Stihl BT 45 Instruction Manual

STIHL BT 45

WARNING

Read Instruction Manual thoroughly before use and follow all safety precautions – improper use can cause serious or fatal injury.

ADVERTENCIA

Antes de usar la máquina lea y siga todas las precauciones de seguridad dadas en el manual de instrucciones – el uso incorrecto puede causar lesiones graves o mortales.

Instruction Manual Manual de instrucciones

Instruction Manual 1 - 35

Manual de instrucciones 36 - 75

Contents

English

Guide to Using this Manual 2 Safety Precautions and Working

Techniques 2 Mounting the Handles 13 Using the Unit 14 Fuel 15 Fueling 16 Gearbox 19

Original Instruction ManualPrinted on chlorine-free paper

Fitting the Auger 20 Starting / Stopping the Engine 20 Operating Instructions 22 Releasing a Trapped Auger 23 Cleaning the Air Filter 23 Engine Management 24 Adjusting the Carburetor 24 Spark Plug 25 Engine Running Behavior 26 Storing the Machine 27 Maintenance and Care 28 Main Parts 29 Specifications 30 Maintenance and Repairs 31

Printing inks contain vegetable oils, paper can be recycled.

Disposal 31 Limited Warranty 32 STIHL Incorporated Federal

Emission Control Warranty Statement 32

Trademarks 34

Allow only persons who fully understand this manual to operate your power drill.

To receive maximum performance and satisfaction from your STIHL power drill, it is important that you read, understand and follow the safety precautions and the operating and maintenance instructions in chapter "Safety Precautions and Working Techniques" before using your power drill. For further information you can go to www.stihlusa.com

Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this manual.

WARNING

Because a power drill is a high-torque, gasoline-powered tool, some special safety precautions must be observed to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury.

0458-421-8621-A. VA4.K20.

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Guide to Using this Manual

Pictograms

The meanings of the pictograms attached to or embossed on the machine are explained in this manual.

Depending on the model concerned, the following pictograms may be on your machine.

Fuel tank for gasoline and engine oil mixture

Press to operate manual fuel pump

Auger brake

Symbols in Text

Many operating and safety instructions are supported by illustrations.

The individual steps or procedures described in the manual may be shown in different ways:

N A bullet indicates a step or

procedure.

A description of a step or procedure that refers directly to an illustration may contain item numbers that appear in the illustration. For example:

N Remove the screw (1)

N Pull the spark arresting screen (2)

upwards out of the muffler

In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are indicated with the symbols and signal words described below:

DANGER

Indicates a hazardous situation that, if not avoided, will result in death or serious injury.

WARNING

Indicates a hazardous situation that, if not avoided, could result in death or serious injury.

NOTICE

Indicates a risk of property damage, including damage to the machine or its individual components.

Engineering Improvements

STIHL’s philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time to time. Therefore, some changes, modifications and improvements may not be covered in this manual. If the operating characteristics or the appearance of your machine differs from those described in this manual, please contact your STIHL dealer or the STIHL distributor for your area for assistance.

Safety Precautions and Working Techniques

Because a power drill is a high-torque, gasolinepowered tool, some special safety precautions must be observed to reduce the risk of personal injury.

It is important that you read, fully understand and observe the following safety precautions and warnings. Read the instruction manual and the safety precautions periodically. Careless or improper use may cause serious or fatal injury.

Have your STIHL dealer show you how to operate your power tool. Observe all applicable local safety regulations, standards and ordinances.

DANGER

Drilling into or contact with electrical wires may cause severe shock, burns or death. See "Working Conditions" below.

WARNING

Striking a hard object in the earth with the turning auger and the resulting slowing or stopping of the auger creates reactive forces. The transfer of rotational (reactive) forces can cause the auger powerhead and handles to rotate suddenly in a counterclockwise direction

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and can result in loss of control or cause the handle to hit the operator or throw him to the ground, resulting in serious injury.

WARNING

Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual.

WARNING

The use of this machine may be hazardous. If the drilling tool comes in contact with your body, it could cause impact or cut injuries.

Use your wood boring drill only for drilling wood. Use your planting auger only for mass flower plantings, small decorative posts, sign holes or deep road fertilization. For use in existing flower beds. Use your ice auger only for drilling holes in ice (with ice auger attachments).

WARNING

Do not use it for other purposes, since misuse may result in personal injury or property damage, including damage to the machine.

WARNING

Minors should never be allowed to use this power tool. Bystanders, especially children, and animals should not be allowed in the area where it is in use.

WARNING

To reduce the risk of injury to bystanders and damage to property, never let your power tool run unattended. When it is not in use (e.g. during a work break), shut it off and make sure that unauthorized persons do not use it.

Most of these safety precautions and warnings apply to the use of all STIHL power drills. Different models may have different parts and controls. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of your model.

Safe use of a wood boring drill or a plant auger involves

1. the operator

2. the power tool

3. the use of the power tool.

THE OPERATOR

Physical Condition You must be in good physical condition

and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate this machine when you are fatigued.

WARNING

Be alert – if you get tired, take a break. Tiredness may result in loss of control. Working with any power tool can be strenuous. If you have any condition that

might be aggravated by strenuous work, check with your doctor before operating this power tool.

WARNING

Prolonged use of a power tool (or other machines) exposing the operator to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome.

These conditions reduce the hand's ability to feel and regulate temperature, produce numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis.

All factors which contribute to whitefinger disease are not known, but cold weather, smoking and diseases or physical conditions that affect blood vessels and blood transport, as well as high vibration levels and long periods of exposure to vibration are mentioned as factors in the development of whitefinger disease. In order to reduce the risk of whitefinger disease and carpal tunnel syndrome, please note the following:

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Most STIHL power tools are available with an anti-vibration ("AV") system designed to reduce the transmission of vibrations created by the machine to the operator's hands. An AV system is recommended for those persons using power tools on a regular or sustained basis.

– Wear gloves and keep your hands

warm.

– Keep the AV system well

maintained. A power tool with loose components or with damaged or worn AV elements will tend to have higher vibration levels.

– Maintain a firm grip at all times, but

do not squeeze the handles with constant, excessive pressure. Take frequent breaks.

All the above-mentioned precautions do not guarantee that you will not sustain whitefinger disease or carpal tunnel syndrome. Therefore, continual and regular users should closely monitor the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately.

WARNING

The ignition system of the STIHL unit produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with a pacemaker should consult their physician and the pacemaker manufacturer before operating this tool.

Proper Clothing

WARNING

To reduce the risk of injury, the operator should wear proper protective apparel.

WARNING

To reduce the risk of injury to your eyes never operate your power tool unless wearing goggles or properly fitted protective glasses with adequate top and side protection complying with ANSI Z87 "+" (or your applicable national standard).

Power tool noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly.

Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted.

Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. Wear overalls or long pants made of heavy material to help protect your legs. Do not wear shorts, sandals or go barefoot.

Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on branches, brush or the moving parts of the unit. Secure hair so it is above shoulder level.

Good footing is very important. Wear sturdy boots with nonslip soles. Steel-toed safety boots are recommended.

Wear an approved safety hard hat to reduce the risk of injury to your head when there is a danger of head injuries.

Always wear heavy duty work gloves (e.g. made of leather or other wear resistant material) when handling the machine and the drilling tool. Heavy-duty, nonslip gloves improve your grip and help to protect your hands.

THE POWER TOOL

For illustrations and definitions of the power tool parts see the chapter on "Main Parts."

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WARNING

Never modify this power tool in any way. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments, drills and augers are useable with STIHL power tools, their use may, in fact, be extremely dangerous.

If this tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuing work. Check in particular that the fuel system is tight (no leaks) and that the controls and safety devices are working properly. Do not continue operating this machine if it is damaged. In case of doubt, have it checked by your STIHL servicing dealer.

THE USE OF THE POWER TOOL

Transporting the Power Tool

WARNING

Always stop the engine before putting the power drill down or carrying it. Carrying a power drill with the engine running is dangerous. Accidental acceleration of the engine can cause the drilling tool to rotate.

WARNING

During operation, the powerhead muffler and the material around it reach extremely high temperatures. Avoid

setting down a hot unit onto dry, flammable material, or touching the hot muffler, you could receive serious burns.

Carry the power drill with the drilling tool pointing down or using a carry strap with the drilling tool pointing to the rear – with the hot muffler away from your body.

Remove the drilling tool before transporting the power tool long distances.

When transporting in a vehicle, properly secure your power tool to prevent turnover, fuel spillage and damage.

When the power tool is not in use, shut it off and put it down so it cannot endanger others.

Fuel Your STIHL power tool uses an oil-

gasoline mixture for fuel (see the "Fuel" chapter in this instruction manual).

WARNING

Gasoline is an extremely flammable fuel. If spilled and ignited by a spark or other ignition source, it can cause fire and serious burn injury or property damage. Use extreme caution when handling gasoline or fuel mix. Do not smoke or bring any fire or flame near the fuel or the power tool. Note that combustible fuel vapor may escape from the fuel system.

Fueling Instructions

WARNING

Pick a Safe Location To reduce the risk of fire and explosion,

fuel your power tool in a well-ventillated area, outdoors away from flames, pilot lights, heaters, electric motors, and other sources of ignition. Vapors can be ignited by a spark or flame many feet away. Select bare ground for fueling and move at least 10 feet (3 m) from the fueling spot before starting the engine. Wipe off any spilled fuel before starting your power tool. Take care not to get fuel on your clothing. If this happens, change your clothing immediately.

Allow the Power Tool to Cool Before Removing the Fuel Cap

WARNING

Gasoline vapor pressure may build up inside the fuel tank. The amount of pressure depends on a number of factors such as the fuel used, altitude and temperature. To reduce the risk of burns and other personal injury from escaping gas, vapor and fumes, always shut off the engine and allow it to cool before removing the fuel cap.

The engine is air cooled. When it is shut off, cooling air is no longer drawn across the cylinder and engine temperatures will rise for several minutes before starting to cool. In hot environments,

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cooling will take longer. To reduce the risk of burns and other personal injury from escaping gas, vapor and fumes, allow the power tool to cool. If you need to refuel before completing a job, turn off the machine and allow the engine to cool before opening the fuel tank.

Fuel Spraying or “Geysering”

WARNING

Removing the cap on a pressurized fuel tank can result in gasoline, vapors and fumes being forcefully sprayed out from the fuel tank in all directions. The escaping gasoline, vapors or fumes can cause serious personal injury, including fire and burn injury, or property damage.

Sometimes also referred to as "fuel geysering," fuel spraying is an expulsion of fuel, vapors and fumes which can occur in hot conditions, or when the engine is hot, and the tank is opened without allowing the power tool to cool adequately. It is more likely to occur when the fuel tank is half full or more.

Pressure is caused by fuel and heat and can occur even if the engine has not been running. When gasoline in the fuel tank is heated (by ambient temperatures, heat from the engine, or other sources), vapor pressure will increase inside the fuel tank.

Some blends of gasoline, particularly those designed for use in winter, are more volatile and may cause tanks to pressurize more quickly or create greater pressure. At higher altitudes, fuel tank pressurization is more likely.

How to Avoid Fuel Spraying Removing the fuel cap on a pressurized

tank can result in gasoline, vapors and fumes being forcefully sprayed out from the fuel tank in all directions. To reduce the risk of burns, serious injuries or property damage from fuel spraying:

– Follow the fueling instructions in this

chapter.

– Always assume your fuel tank is

pressurized.

– Allow the power tool to cool before

removing the fuel cap.

– In hot environments, cooling will

take longer.

– The engine is air cooled. When it is

shut off, cooling air is no longer drawn across the cylinder and the engine temperature will rise for several minutes before starting to cool.

After the power tool has cooled appropriately, follow the safety instructions in this chapter for removing the cap. Never remove the cap by turning it directly to the open position. First check for residual pressure by turning the cap slowly to the vent position, approximately 1/8 turn counterclockwise. Use only good quality fuel that is appropriate for the season (summer v. winter blends). Some blends of gasoline, particularly winter blends, are more volatile and can contribute to fuel spraying.

Removing the Toolless Fuel Cap: Turn Slowly and Stop in the Vent Position

WARNING

123

After allowing the power tool to cool, remove the fuel filler cap slowly and carefully to allow any remaining pressure build-up in the tank to release:

– Flip up the grip and press the cap

down firmly (1).

– While maintaining steady,

downward pressure, turn the cap slowly counter-clockwise to the vent position (2), approximately a 1/8 turn of the cap.

– If any significant venting occurs,

immediately re-seal the tank by turning the cap clockwise to the closed position. Allow the power tool to cool further before attempting to open the tank.

– Turn the cap to the open position (3)

only after the contents of the tank are no longer under pressure. In the open position, the exterior positioning mark (4) on the cap will line up with the "unlocked" symbol (5) on the fuel tank housing.

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– Never remove the cap by turning it

directly to the open position. First allow the power tool to cool adequately and then release any residual pressure at the vent position (2).

– Never attempt to remove the cap

while the engine is still hot or running.

Installing the Toolless Fuel Cap

WARNING

An improperly tightened fuel filler cap can loosen or come off and spill quantities of fuel. To reduce the risk of fuel spillage and fire from an improperly installed fuel cap, correctly position and tighten the cap in the fuel tank opening:

– Raise the grip on the top of the cap

until it is upright at a 90° angle. Insert the cap in the fuel tank opening with the exterior positioning mark (1) lined up with the "unlocked" symbol (2) on the fuel tank housing.

– Using the grip, press the cap down

firmly while turning it clockwise to the closed position (approximately 1/4 turn). In the closed position, the interior (4) and exterior (1) positioning marks will align with the "locked" symbol (3) on the fuel tank housing.

– Fold the grip flush with the top of the

cap and check for tightness.

Misaligned, Damaged or Broken Cap

WARNING

ABC

0000-GXX-6420-A0

If the cap does not drop fully into the fuel tank opening when the positioning marks (1, 2) line up, or if it does not tighten properly when turned, the base of the cap may be prematurely rotated in relation to the top. Such misalignment can result from handling, cleaning or an improper attempt at tightening.

– Illustrations A and B: The base of

the cap is prematurely rotated to the closed position and is not in the correct starting position for installation. The tank will not seal in this configuration. Note: in Illustrations A and B, the interior positioning marks (1) are in line with the exterior position marks (2).

– Illustration C: The bottom of the cap

is in the correct starting position for installation. Note: In Illustration C, the interior positioning mark (1) is under the grip and not in line with the outer position mark (2).

To return the base of the cap to the proper starting position for installation:

0000-GXX-6421-A0

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N Drop the cap into the fuel tank

opening (A).

N Next, turn the cap counter-

clockwise with slight pressure until it drops fully into the fuel tank opening (approximately 1/4 turn) (B). This will rotate the base of the cap into the correct starting position for installation (C). The exterior positioning mark (1) on the cap will line up with the "unlocked" symbol (2) on the fuel tank housing. The interior positioning mark should be under the grip and not in line with the outer positioning mark (1).

N Then, turn the cap clockwise,

closing it normally.

If your fuel cap still does not tighten properly, it may be damaged or broken. Stop using the power tool and take it to your authorized STIHL dealer for repair.

Vapor Lock

WARNING

Vapor lock occurs when fuel in the fuel line or carburetor vaporizes, causing bubbles to block the free flow of liquid fuel into the carburetor. Vapor lock cannot be relieved or affected by opening the fuel tank. Removing the fuel filler cap without first allowing the power tool to cool adequately can result in fuel

spraying. Always follow the instructions in this section when removing the fuel cap.

To relieve vapor lock: – Press the manual fuel pump bulb at

least 20 to 30 times – even if the

0000-GXX-6422-A1

bulb is already filled with fuel – to clear the vapor and send liquid fuel into the carburetor. Then start the power tool. For specific starting instructions, see the appropriate section of your instruction manual.

– If the manual fuel pump bulb will not

be filled, place the Choke Lever to the cold start position l and pull the starter cord until the engine runs or fires.

– If your power tool will not restart, or

if vapor lock occurs again, the power tool is being used in conditions too extreme for the fuel being used. Discontinue use and let the engine cool completely before attempting to start the power tool.

Before Operation

WARNING

Always check your power tool for proper condition and operation before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and drilling tool or auger. The throttle trigger must move freely and always spring back to the idle position. Never attempt to modify the controls or safety devices. Regular maintenance is important in this respect. Make sure the drilling tool is in good condition and properly connected.

WARNING

Check fuel system for leaks, especially the visible parts, e.g., filler cap, hose connections, manual fuel pump (only for power tools equipped with a manual fuel pump). Do not start the engine if there are leaks or damage – risk of fire. Have the power tool repaired by a STIHL servicing dealer before using it.

WARNING

Never operate your power tool if it is damaged, improperly adjusted or maintained, or not completely and securely assembled.

WARNING

Check that the spark plug boot is securely mounted on the spark plug – a loose boot may cause arcing that could ignite combustible fumes and cause a fire.

Keep the handles clean and dry at all times; it is particularly important to keep them free of moisture, pitch, oil, fuel mix, grease or resin in order for you to maintain a firm grip and properly control your power tool.

For specific starting instructions, see the appropriate section of your instruction manual.

Starting Start the engine at least 10 feet (3 m)

from the fueling spot, outdoors only.

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421BA001 KN

For specific starting instructions, see the appropriate section of your manual. Place the power tool on firm ground or other solid surface in an open area. Maintain good balance and secure footing.

WARNING

Your power drill should be started only when it is held steady by the operator.

WARNING

To reduce the risk of loss of control, be sure that the power drill gear is set in the neutral position N. When the engine starts at starting throttle, engine speed will be fast enough for the clutch to engage and, if the gear is not set in the neutral position, turn the drilling tool.

Once the engine has started, immediately blip the throttle trigger, which should release the starting throttle and allow the engine to slow down to idle.

WARNING

Your power tool is a one-person machine. Do not allow other persons in the general work area, even when starting.

WARNING

To reduce the risk of injury from loss of control, do not attempt to "drop start" your power tool.

WARNING

When you pull the starter grip, do not wrap the starter rope around your hand. Do not let the grip snap back, but guide the starter rope to rewind it properly. Failure to follow this procedure may result in injury to your hand or fingers and may damage the starter mechanism.

Important Adjustments

WARNING

To reduce the risk of personal injury from loss of control or contact with the turning drilling tool, do not use your unit with incorrect idle adjustment. At correct idle speed, the drilling tool should not move. For directions on how to adjust idle speed, see the appropriate section of your instruction manual.

If you cannot set the correct idle speed, have your STIHL dealer check your power tool and make proper adjustments and repairs.

During Operation Holding and Controlling the Power Tool Always hold the unit firmly with both

hands on the handles while you are working. Wrap your fingers and thumbs around the handles.

Keep your hands in this position to have your power drill under control at all times.

Drilling Planting Holes

Drilling Holes in Wood

WARNING

Do not overreach. Keep proper footing and balance at all times. Special care must be taken in slippery conditions (wet ground, snow, ice) and in difficult, overgrown terrain. Watch for hidden

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obstacles such as tree stumps, roots and ditches to avoid stumbling. For better footing, clear away fallen branches, scrub and cuttings. Be extremely cautious when working on slopes or uneven ground or when working with an ice auger attachment on ice.

WARNING

To reduce the risk of injury from loss of control, never work on a ladder, in a tree or any other insecure support. Never hold the machine above shoulder height.

WARNING

Never work in a tree unless you have received specific, professional training for such work, are properly secured (such as tackle and harness system or a lift bucket), have both hands free for operating the power tool in a cramped environment.

Working Conditions Operate and start your power tool only

outdoors in a well ventilated area. Operate it under good visibility and daylight conditions only. Work carefully.

WARNING

As soon as the engine is running, this product generates toxic exhaust fumes containing chemicals, such as unburned hydrocarbons (including benzene) and carbon monoxide, that are known to cause respiratory problems, cancer, birth defects, or other reproductive harm. Some of the gases (e.g. carbon monoxide) may be colorless and odorless. To reduce the risk of serious or fatal injury / illness from inhaling toxic fumes, never run the machine indoors or in poorly ventilated locations.

WARNING

Inhalation of certain dusts, especially organic dusts such as mold or pollen, can cause susceptible persons to have an allergic or asthmatic reaction. Substantial or repeated inhalation of dust and other airborne contaminants, in particular those with a smaller particle size, may cause respiratory or other illnesses. Control dust at the source where possible. Use good work practices, such as operating the unit so that the wind or operating process directs any dust raised by the power tool away from the operator. Follow the recommendations of EPA / OSHA / NIOSH and occupational and trade associations with respect to dust ("particulate matter"). When the

inhalation of dust cannot be substantially controlled, i.e., kept at or near the ambient (background) level, the operator and any bystanders should wear a respirator approved by NIOSH / MSHA for the type of dust encountered.

Striking something hard in the earth (or a hard object in wood), such as a rock or gravel, may cause the drilling tool to slow down suddenly or stop. In such a situation, some or all of the rotational force (reactive force) is transferred to the powerhead of the power drill, which can cause the control handle powerhead and assist-handle to rotate suddenly in a counterclockwise direction.

WARNING

Work carefully in rocky ground or where other solid objects may be present. Keep throttle feed pressure to a minimum. If you feel or hear the drilling tool strike a solid object, release the throttle trigger immediately and remove the object before drilling is continued. When drilling in heavy clay soil, bore about 1/3 way and remove the auger from the hole. Clean off auger then continue in slow steps frequently clearing drill.

WARNING

You should hold your power drill firmly to control sudden jolts and reactive forces. Be prepared to release the throttle

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completely if the forces become too great. If reactive forces are not controlled, rotation of the handles may result in severe jerking and loss of control and may cause the powerhead or assist handle to strike you or throw you to the ground.

If the auger becomes trapped in the drillhole, turn off the engine immediately and remove as descripted in the chapter entitled "Releasing a Trapped Auger."

DANGER

Contact with electrical cables or wires can cause serious injury or death as a result of electrical shock. This unit is not insulated.

WARNING

To reduce the risk of electrocution and damage to property, always be alert for underground pipes and cables and for overhead wires. Before drilling, obtain the necessary plans and permits. Contact your local utility company or your locator service, such as "Miss Utility" or "One Call", for information as to cable and pipe locations. Where necessary, confirm actual location by use of devices such as cable detectors and / or by carefully dug trenches. Stay clear of overhead electrical wires when backing the drilling tool out of the hole. If any portion of the machine strikes a wire, it will cause electrical shock or death.

WARNING

Before working with an ice auger attachment on frozen ponds, lakes or streams, check with local authorities and take all necessary precautions to ensure safe ice thickness.

WARNING

Thrown objects may ricochet and strike the operator.

Operating Instructions

WARNING

Do not operate your power tool using the starting throttle lock, as you do not have control of the engine speed.

In the event of an emergency, switch off the engine immediately – move the stop switch to 0 or STOP.

WARNING

When taking the drilling tool out of the hole, lift the machine vertically so that the tool comes out straight without canting. To minimize splashing when drilling ice holes, back off the throttle when the drilling tool breaks through the ice. Raise the unit slowly. Cover and clearly mark boreholes to prevent anyone from stepping in a hole.

WARNING

To reduce the risk of injury from contact with the drilling tool, always switch off the engine and put the gear in the neutral position N before changing a

drilling tool. For specific instructions to change the drilling tool see the chapter "Fitting the Drilling Tool."

WARNING

To reduce the risk of injury, never touch a drilling tool or drilling spindle with your hand or any part of your body. It continues to rotate for a short period after the throttle lever is released. Always shut off the engine before putting the machine down.

WARNING

Drilling tool blades and point are sharp. To reduce the risk of cut injuries, use caution when operating and handling.

MAINTENANCE, REPAIR AND STORING

Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However, if you make a warranty claim for a component which has not been serviced or maintained properly, STIHL may deny coverage.

WARNING

Use only identical STIHL replacement parts for maintenance and repair. Use of non-STIHL parts may cause serious or fatal injury.

Strictly follow the maintenance and repair instructions in the appropriate section of your instruction manual. Please refer to the maintenance chart in this manual.

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WARNING

Always stop the engine and turn the gear into the neutral position N before doing any maintenance or repair work or cleaning the power tool.

WARNING

Do not attempt any maintenance or repair work not described in your instruction manual. Have such work performed by your STIHL servicing dealer only.

WARNING

Never test the ignition system with the spark plug boot removed from the spark plug or with a removed spark plug, since uncontained sparking may cause a fire.

WARNING

Use the specified spark plug and make sure it and the ignition lead are always clean and in good condition. Always press spark plug boot snugly onto spark plug terminal of the proper size. (Note: If terminal has detachable SAE adapter nut, it must be securely attached.) A loose connection between spark plug terminal and the ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire.

WARNING

Check condition of drilling tool at regular short intervals. If behavior of tool changes, check immediately for tightness or any signs of cracks in particular.

WARNING

Wear gloves when handling or performing maintenance on used drilling tools or augers.

WARNING

Replace damaged drilling tools immediately, even if the have only superficial cracks. Never attempt to repair damaged drilling tools.

WARNING

Do not operate your power tool if the muffler is damaged, missing or modified. An improperly maintained muffler will increase the risk of fire and hearing loss. Your muffler is equipped with a sparkarresting screen to reduce the risk of fire; never operate your power tool if the screen is missing, damaged or clogged. Remember that the risk of a brush or forest fire is greater in hot or dry weather.

In California, it is a violation of § 4442 or

§ 4443 of the Public Resources Code to use or operate gasoline-powered tools on forest-covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a complying spark arrester that is maintained in effective working order. The owner/operator of this product is responsible for properly maintaining the spark arrester. Other states or governmental entities/agencies, such as the U.S. Forest Service, may have similar requirements. Contact your local fire agency or forest service for the laws or regulations relating to fire protection requirements.

Tighten all nuts, bolts and screws except the carburetor adjustment screws after each use.

For any maintenance of the emission control system please refer to the maintenance chart and to the limited warranty statement near the end of the instruction manual.

Do not clean your machine with a pressure washer. The solid jet of water may damage parts of the machine.

Store your power tool in a dry and locked location out of reach of children. Before storing for longer than a few days, always empty the fuel tank (see chapter "Storing the Machine" in the instruction manual).

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421BA003 KN

421BA036 KN

421BA005 KN

421BA037 KN

421BA007 KN

Mounting the Handles

Assist handle for wood drill

Before mounting a new assist handle for the first time:

N Hold the handle (1) by the clamp

and turn it clockwise until the gap (2) is completely closed.

This breaks the small plastic retainer in the clamp and allows the clamp to be opened up.

Normal mounting procedure N Hold the clamp firmly and unscrew

the handle counterclockwise.

N Open up the clamp slightly. N Push the handle over the chuck until

it butts against the machine – the clamp must engage the groove on the gearbox housing.

N Screw the handle into clamp

clockwise.

N Move the handle to the required

position and tighten it down firmly.

Assist handle for planting auger

N Loosen the two wing screws (3) on

the flange (4).

N Make sure the polymer bushing is

properly seated (see arrow).

N Push the flange onto the machine

as far as stop and line it up.

N Insert the handle tube (5) in the

flange.

N Move the handle to the required

position and tighten down the two wing screws firmly.

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421BA002 KN

421BA009 KN

Using the Unit

Your power drill can be used for a range of applications, e.g. fence-building and carpentry (kit for wood drill) and in landscaping and gardening (kit for planting hole auger).

General

WARNING

To change the drilling tool, always shut off the engine and set the rotary knob to N.

Always fit the assist handle specified for the drilling tool you intend to use. See "Mounting the Handles".

WARNING

During operation, always hold the machine firmly with both hands to control unexpected reactive forces caused by the drilling tool jamming in or passing through the material.

Working with the planting hole auger

N Make sure you have a safe and

secure footing.

WARNING

During operation, always hold the machine firmly with both hands to control unexpected reactive forces that may occur if the drilling tool jams, e.g. in rocky ground. Release the throttle trigger if the drilling tool jams.

The planting hole auger should be operated only with the gearbox set to position 1. The tool speed is too high for drilling planting holes when the gearbox is set to poistion 2.

Working with a wood drill or twist drill

N Make sure you have a safe and

secure footing.

WARNING

During operation, always hold the machine firmly with both hands to control unexpected reactive forces caused by the drilling tool jamming in or passing through the wood. Release the throttle trigger if the drilling tool jams.

Drilling tool jammed

See "Releasing a Trapped Auger".

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Fuel

This engine is certified to operate on unleaded gasoline and the STIHL twostroke engine oil at a mix ratio of 50:1.

Your engine requires a mixture of highquality gasoline and two-stroke air cooled engine oil.

Use mid-grade unleaded gasoline with a minimum octane rating of 89 ((R+M)/2) and no more than 10% ethanol content.

NOTICE

Fuel with an octane rating below 89 may increase engine temperatures. This, in turn, increases the risk of piston seizure and damage to the engine.

The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as well. This could cause running problems or damage the engine. For this reason STIHL recommends that you use only quality unleaded gasoline!

NOTICE

Gasoline with an ethanol content of more than 10% can cause running problems and major damage in engines and should not be used.

For further details, see www.STIHLusa.com/ethanol

The ethanol content in gasoline affects engine speed – it may be necessary to readjust the carburetor if you use fuels with various ethanol contents.

WARNING

To reduce the risk of personal injury from loss of control and/or contact with the running cutting tool, do not use your unit with an incorrect idle adjustment. At correct idle speed, the cutting tool should not move.

If your machine’s idle speed is incorrectly adjusted, have your authorized STIHL servicing dealer check your machine and make the proper adjustments and repairs.

The idle speed and maximum speed of the engine change if you switch from a fuel with a certain ethanol content to a fuel with a much higher or lower ethanol content.

This problem can be avoided by always using fuel with the same ethanol content.

To ensure the maximum performance of your STIHL engine, use a high quality 2cycle engine oil. To help your engine run cleaner and reduce harmful carbon deposits, STIHL recommends using STIHL HP Ultra 2-cycle engine oil or ask your dealer for an equivalent fully synthetic 2-cycle engine oil.

To meet the requirements of EPA and CARB we recommend to use STIHL HP Ultra oil.

STIHL MotoMix

STIHL recommends the use of STIHL MotoMix. STIHL MotoMix has a high octane rating and ensures that you always use the right gasoline/oil mix ratio.

STIHL MotoMix uses STIHL HP Ultra two-stroke engine oil suited for high performance engines.

For further details, see www.STIHLusa.com/ethanol

If not using MotoMix, use only STIHL two-stroke engine oil or equivalent highquality two-stroke engine oils that are designed for use in air cooled two-cycle engines.

The use of non-seasonal gasoline blends may increase the potential for pressure to build in the fuel tank during operation. For example, using a winter blend during the summer will increase pressure in the fuel tank. Always use gasoline blends appropriate to the season, altitude and other environmental factors.

Do not use NMMA or TCW rated (twostroke water cooled) mix oils or other mix oils that state they are for use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, etc.).

WARNING

Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor. When filling at the pump, first remove the container from your vehicle and place the container on the ground before filling. To reduce the risk of sparks from static discharge and resulting fire and/or explosion, do not fill fuel containers that are sitting in or on a vehicle or trailer.

The container should be kept tightly closed in order to limit the amount of moisture that gets into the mixture.

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The machine's fuel tank should be cleaned as necessary.

Fuel mix ages

If not using MotoMix, only mix sufficient fuel for a few days of work, not to exceed 30 days of storage. Store in approved fuel-containers only. When mixing, pour oil into the container first, and then add gasoline. Close the container and shake it by hand to ensure proper mix of oil and gasoline.

WARNING

Shaking fuel can cause pressure to build in the fuel container. To reduce the risk of fire and severe personal injury or property damage from fuel spraying, allow the fuel container to sit for several minutes before opening. Open the container slowly to release any residual pressures. Never open the fuel container in the vicinity of any ignition source. Read and follow all warnings and instructions that accompany your fuel container.

Gasoline

US gal. US fl.oz.

12.6 2 1/2 6.4

512.8 Dispose of empty mixing-oil containers

only at authorized disposal locations.

Oil (STIHL 50:1 or equivalent high-quality oils)

Fueling

WARNING

Removing the cap on a pressurized fuel tank can result in gasoline, vapors and fumes being forcefully sprayed out from the tank in all directions. The escaping gasoline, vapors or fumes, sometimes referred to as fuel spraying or "geysering," can cause serious personal injury, including fire and burn injury, or property damage.

Fuel spraying can occur when the engine is hot and the tank is opened while under pressure. It can occur in hot environments even if the engine has not been running. Spraying is more likely to occur when the fuel tank is half full or more.

Avoid Injuries from Fuel Spraying. Always follow the fueling instructions in

this manual: – Treat every fuel tank as if it is

pressurized, particularly if it is half full or more.

– Always allow the power tool to cool

adequately before attempting to open the fuel tank or refueling; this will take longer in hot conditions.

– Never remove the cap by turning it

directly to the open position. Turn it first approximately 1/8 of a turn counter-clockwise to the vent position to relieve any residual pressure.

– Never open the fuel tank while the

engine is still hot or running.

– Never open the fuel tank or re-fuel

the power tool near any sparks, flames or other ignition sources.

– Pick the right fuel: use only good

quality (89 octane or higher), fresh fuel blended for the season.

– Vapor lock: do not remove the fuel

cap in an effort to relieve vapor lock. Removing the cap has no effect on vapor lock.

– Be aware that fuel spraying is more

likely at higher altitudes.

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547BA009 KN

0000-GXX-6425-A0

Preparations

N Before fueling, clean the filler cap

and the area around it to ensure that no dirt falls into the tank.

N Position the machine so that the

filler cap is facing up.

Opening

WARNING

After allowing the power tool to cool, remove the fuel filler cap slowly and carefully to allow any remaining pressure build-up in the tank to release:

N Flip up the grip and press the cap

down firmly (1).

N Turn the cap to the open position (3)

0000-GXX-6423-A0

N Remove the fuel filler cap.

WARNING

Never remove the cap by turning it directly to the open position. First allow the power tool to cool adequately and then release any residual pressure at the vent position (2). Never attempt to remove the cap while the engine is still hot or running.

WARNING

In order to reduce the risk of fire and personal injury from escaping gas vapor and fumes, remove the fuel filler cap slowly and carefully so as to allow any pressure build-up in the tank to release slowly.

N While maintaining steady,

downward pressure, turn the cap slowly counter-clockwise to the vent position (2), approximately a 1/8 turn of the cap.

N If any significant venting occurs,

0000-GXX-6424-A0

Refueling

Take care not to spill fuel while fueling and do not overfill the tank – leave approximately 1/2" (13 mm) air space.

Closing

immediately re-seal the tank by turning the cap clockwise to the closed position. Allow the power tool to cool further before attempting to open the tank.

WARNING

An improperly tightened fuel filler cap can loosen or come off and spill quantities of fuel. To reduce the risk of

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0000-GXX-6426-A0

0000-GXX-6427-A0

ABC

0000-GXX-6421-A0

fuel spillage and fire from an improperly installed fuel cap, correctly position and tighten the cap in the fuel tank opening:

N Raise the grip on the top of the cap

until it is upright at a 90° angle. Insert the cap in the fuel tank opening with the exterior positioning mark (1) lined up with the "unlocked" symbol (2) on the fuel tank housing.

N Using the grip, press the cap down

N Fold the grip flush with the top of the

cap and check for tightness.

WARNING

If the grip does not lie completely flush with the cap or the detent on the grip does not fit in the corresponding recess in the tank opening, or if the cap is loose, the cap is not properly seated and you must repeat the above steps. Also refer to the procedure below for returning the base of the cap to the proper starting position for installation.

If the filler cap will not engage into the fuel tank housing

– Illustrations A and B: The base of

– Illustration C: The bottom of the cap

is in the correct starting position for installation. Note: In Illustration C, the interior positioning mark (1) is under the grip and not in line with the outer position mark (2).

To return the base of the cap to the proper starting position for installation:

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421BA017 KN

N Drop the cap into the fuel tank

opening (A).

N Next, turn the cap counter-

N Then, turn the cap clockwise,

closing it normally.

If your fuel cap still does not tighten properly, it may be damaged or broken. Stop using the power tool and take it to your authorized STIHL dealer for repair.

Gearbox

0000-GXX-6422-A1

The power drill is equipped with a change-speed gearbox. Depending on the application and the drilling tool used, the speed can be adjusted to suit requirements.

Knob positions

NOTICE

The position of the rotary knob may be changed only when the engine is running at idle speed – the drilling spindle must be stationary. It may be necessary to turn the drilling spindle slightly before the rotary knob can be moved to the required position.

WARNING

Do not change the position of the rotary knob while the engine is running above idle speed – the drilling tool rotates.

N Neutral: Gearbox in neutral for

starting, adjusting the carburetor and changing the drilling tool.

1 Low-speed clockwise rotation, see

"Specifications"

2 High-speed clockwise rotation, see

"Specifications"

R Counterclockwise rotation, e.g. for

releasing a trapped drilling tool

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421BA018 KN

421BA039 KN

421BA020 KN

Fitting the Auger

N With the engine stopped (knob in N

position), place the machine on the ground and make sure it is secure.

Chuck for wood drills or twist drills

N Insert the drilling tool (1) in the

chuck (2) and tighten it firmly.

WARNING

When using the geared rim drill chuck (special accessory), make sure you remove the chuck key before starting up.

Adapter for planting hole auger

N Screw the adapter (3) onto the

drilling spindle (4).

N Use a 13mm open-end wrench to

hold the spindle steady and tighten the adapter firmly with a 19mm open-end wrench.

N Secure the drilling tool (5) in the

adapter.

N Use a 17mm open-end wrench to

secure and release the planting hole auger.

Starting / Stopping the Engine

N Set rotary knob to N (gearbox in

neutral).

WARNING

The machine may only be started with the gearbox in neutral. If left in positions 1, 2 and R, the drilling tool may begin to rotate when the clutch engagement speed is reached. This could result in accidents or personal injury due to loss of control.

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421BA021 KN

421BA022 KN

421BA001 KN

421BA023 KN

Starting the Engine

Do not let the starter grip snap back. Guide it slowly back into the housing so that the starter rope can rewind properly.

When engine begins to fire

N Press the manual fuel pump

bulb (5) at least five times.

N Depress the choke lever (1) and set

it to

Cranking

l if the engine is cold j for warm start – also use this posi-

tion if the engine has been running but is still cold.

N Move the stop switch (2) to F and N squeeze the throttle trigger (3) and

hold it there.

N Press in the starting throttle lock (4)

and hold it there.

N Let go of the throttle trigger and

starting throttle lock. This is the starting throttle position.

N Place the unit on the ground so that

it is secure.

N Press the machine against the

ground with your left hand on the engine housing.

N Pull the starter grip slowly with your

N Set choke lever to j and N continue cranking.

As soon as the engine runs N Blip the throttle trigger – the starting

throttle lock moves to the normal run position and the engine returns to idling speed.

Stopping the Engine

N Move the stop switch to 0.

right hand until you feel it engage and then give it a brisk strong pull. Do not pull out the starter rope to full length – it might otherwise break.

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At very low outside temperatures

N As soon as the engine runs: Blip the

throttle trigger to disengage the starting throttle lock – it mov es to the normal run position and the engine returns to idle speed.

N Open throttle slightly – warm up the

engine for a short period.

If engine does not start

If you did not move the choke lever quickly enough to j (warm start) after the engine began to fire, the engine is flooded.

N Set choke lever to j and N Set the throttle trigger to the starting

throttle position.

N Start the engine by pulling the

starter rope briskly – 10 to 20 pulls may be necessary.

If the engine still does not start N Remove the spark plug – see

"Spark Plug".

N Dry the spark plug. N Open the throttle wide. N Crank the engine several times with

the starter to clear the combustion chamber.

N Install the spark plug – see "Spark

Plug".

N Move the stop switch to F and N set choke lever to j – (warm start

position) even if the engine is cold.

N Now start the engine.

If fuel tank has been run completely dry and then refueled

N Press the fuel pump bulb at least

five times.

N Now start the engine.

Operating Instructions

During break-in period

A factory-new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings.

During Operation

After a long period of full throttle operation, allow the engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air. This protects enginemounted components (ignition, carburetor) from thermal overload.

After Finishing Work

Storing for a short period: Wait for the engine to cool down. Empty the fuel tank and keep the machine in a dry place, well away from sources of ignition, until you need it again. For longer out-ofservice periods – see "Storing the Machine".

BT 45

+ 56 hidden pages

Stihl BT 45 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual