Cub Cadet CC4175, CC4125 User Manual
In an effort to reduce the impact on the forests,
and reduce carbon and greenhouse gas
emissions, MTD is using less paper by reducing
the text size of this manual.
Operator’s Manual
4-Cycle Gas Trimmers
CC4125/ CC4175
TABLE OF CONTENTS
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Oil and Fuel Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Starting/Stopping Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Maintenance & Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . .5
Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
All information, illustrations, and specifications in this manual are based
on the latest product information available at the time of printing. We
reserve the right to make changes at any time without notice.
Copyright© 2007 MTD SOUTHWEST INC, All Rights Reserved.
SAVE THESE INSTRUCTIONS
For service call 1-877-282-8684, or 1-800-668-1238 in Canada to
obtain a list of authorized service dealers near you. For more details
about your unit, visit our website at www.cubcadet.com.
If you have difficulty assembling this product or have any questions
regarding the controls, operation or maintenance of this unit, please
call the Customer Support Department.
DO NOT RETURN THE UNIT TO THE RETAILER. PROOF OF
PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.
THIS PRODUCT IS COVERED BY ONE OR MORE U.S. PATENTS.
OTHER PATENTS PENDING.
Service on this unit both within and after the warranty period should
be performed only by an authorized and approved service dealer.
Copy the serial number here:
Copy the model and parent part number here:
Before beginning, locate the unit’s model plate. It lists the model and
serial numbers of your unit. Refer to the sample plate below and
copy the information for future reference.
SPARK ARRESTOR NOTE
NOTE: For users on U.S. Forest Land and in the states of California,
Maine, Oregon and Washington. All U.S. Forest Land and the state of
California (Public Resources Codes 4442 and 4443), Oregon and
Washington require, by law that certain internal combustion engines
operated on forest brush and/or grass-covered areas be equipped with a
spark arrestor, maintained in effective working order, or the engine be
constructed, equipped and maintained for the prevention of fire. Check
with your state or local authorities for regulations pertaining to these
requirements. Failure to follow these requirements could subject you to
liability or a fine. This unit is factory equipped with a spark arrestor. If
it requires replacement, ask your LOCAL SERVICE DEALER to install the
Accessory Part #753-05297 Spark Arrestor Kit.
CALIFORNIA PROPOSITION 65 WARNING
WARNING
THE ENGINE EXHAUST FROM THIS PRODUCT CONTAINS
CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE
CANCER, BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM.
PART NO. 769-03534A (12/07)
RULES FOR SAFE OPERATION
Read the Operator’s Manual and follow all warnings and safety
instructions. Failure to do so can result in serious injury to the operator
and/or bystanders.
FOR QUESTIONS, CALL 1-877-282-8684 IN U.S. OR 1-800-668-1238 in
CANADA
SYMBOL MEANING
WARNING:
Failure to obey a safety warning can result
in injury to yourself and others. Always follow the safety
precautions to reduce the risk of fire, electric shock and
personal injury.
CAUTION:
Failure to obey a safety warning may result in
property damage or personal injury to yourself or to others.
Always follow the safety precautions to reduce the risk of
fire, electric shock and personal injury.
READ ALL INSTRUCTIONS BEFORE OPERATING
• Read the instructions carefully. Be familiar with the controls and
proper use of the unit.
• Do not operate this unit when tired, ill, or under the influence of
alcohol, drugs, or medication.
• Children and teens under the age of 15 must not use the unit,
except for teens guided by an adult.
• All guards and safety attachments must be installed properly
before operating the unit.
•
Inspect the unit before use. Replace damaged parts. Check for fuel
leaks. Make sure all fasteners are in place and secure. Replace parts
that are cracked, chipped, or damaged in any way. Do not operate the
unit with loose or damaged parts.
• Carefully inspect the area before starting the unit. Remove all
debris and hard or sharp objects such as glass, wire, etc.
• Be aware of the risk of injury to the head, hands and feet.
•
Clear the area of children, bystanders, and pets. At a minimum, keep all
children, bystanders, and pets outside a 50 feet (15 m.) radius; there still
may be a risk to bystanders from thrown objects. Bystanders should be
encouraged to wear eye protection. If you are approached, stop the unit
immediately.
• Use only 0.105 inch, 2.67 mm diameter original equipment
manufacturer replacement line. Never use metal-reinforced line, wire
or rope. These can break off and become dangerous projectiles.
• Squeeze the throttle control and check that it returns automatically to
the idle position. Make all adjustments or repairs before using unit.
WARNING:
When using the unit, you must follow the safety
rules. Please read these instructions before operating the unit in
order to ensure the safety of the operator and any bystanders.
Please keep these instructions for later use.
• IMPORTANT SAFETY INSTRUCTIONS •
SAFETY WARNINGS FOR GAS UNITS
• Store fuel only in containers specifically designed and approved
for the storage of such materials.
• Avoid creating a source of ignition for spilled fuel. Do not start
the engine until fuel vapors dissipate.
• Always stop the engine and allow it to cool before filling the fuel
tank. Never remove the fuel tank cap or add fuel when the engine is
hot. Never operate the unit without the fuel cap securely in place.
Loosen the fuel tank cap slowly to relieve any pressure in the tank.
• Add fuel in a clean, well-ventilated outdoor area where there are
no sparks or flames. Remove the fuel cap slowly, and only after
the engine stops. Do not smoke while fueling. Wipe up any
spilled fuel from the unit immediately.
• Avoid creating a source of ignition for spilled fuel. Do not start
the engine until fuel vapors dissipate.
• Move the unit at least 30 feet (9.1 m) from the fueling source and site
before starting the engine. Do not smoke. Keep sparks and open
flames away from the area while adding fuel or operating the unit.
WHILE OPERATING
• Never start or run the unit inside a closed room or building.
Breathing exhaust fumes can be fatal. Operate this unit only in a
well-ventilated outdoor area.
• Wear safety glasses or goggles that meet ANSI Z87.1 standards and
are marked as such. Wear ear/hearing protection when operating
this unit. Wear a face or dust mask if the operation is dusty.
• Wear heavy long pants, boots, gloves and a long sleeve shirt. Do
not wear loose clothing, jewelry, short pants, sandals or go
barefoot. Secure hair above shoulder level.
•
The cutting attachment shield must always be in place while operating
the unit as a trimmer. Do not operate unit without both trimming lines
extended, and the proper line installed. Do not extend the trimming line
beyond the length of the shield.
• This unit has a clutch. The cutting attachment remains stationary
when the engine is idling. If it does not, have the unit adjusted by
an authorized service technician.
• Adjust the handle to your size in order to provide the best grip.
• Be sure the cutting attachment is not in contact with anything
before starting the unit.
• Use the unit only in daylight or good artificial light.
• Avoid accidental starting. Be in the starting position whenever
pulling the starter rope. The operator and unit must be in a stable
position while starting. Refer to Starting/Stopping Instructions.
• Use the right tool. Only use this tool for its intended purpose.
• Do not overreach. Always keep proper footing and balance.
• Always hold the unit with both hands when operating. Keep a
firm grip on both handles or grips.
• Keep hands, face, and feet at a distance from all moving parts. Do
not touch or try to stop the cutting attachment when it rotates.
• Do not touch the engine, gear housing or muffler. These parts get
extremely hot from operation, even after the unit is turned off.
• Do not operate the engine faster than the speed needed to cut, trim
or edge. Do not run the engine at high speed when not cutting.
• Always stop the engine when cutting is delayed or when walking
from one cutting location to another.
•
If you strike or become entangled with a foreign object, stop the engine
immediately and check for damage. Do not operate before repairing
damage. Do not operate the unit with loose or damaged parts.
• Stop the unit, switch the engine to off, and disconnect the spark
plug for maintenance or repair.
•
Use only original equipment manufacturer replacement parts and
accessories for this unit. These are available from your authorized service
dealer. Use of any unauthorized parts or accessories could lead to
serious injury to the user, or damage to the unit, and void your warranty.
WARNING:
Gasoline is highly flammable, and its vapors
can explode if ignited. Take the following precautions:
2
The purpose of safety symbols is to attract your attention to possible
dangers. The safety symbols, and their explanations, deserve your
careful attention and understanding. The safety warnings do not by
themselves eliminate any danger. The instructions or warnings they
give are not substitutes for proper accident prevention measures.
SAFETY ALERT:
Indicates danger, warning or caution.
Attention is required in order to avoid serious personal
injury. May be used in conjunction with other symbols or
pictographs.
NOTE: Advises you of information or instructions vital to the
operation or maintenance of the equipment.
DANGER:
Failure to obey a safety warning will result in
serious injury to yourself or to others. Always follow the
safety precautions to reduce the risk of fire, electric shock
and personal injury.
RULES FOR SAFE OPERATION
This operator's manual describes safety and international symbols and pictographs that may appear on this product. Read the operator's
manual for complete safety, assembly, operating and maintenance and repair information.
• SAFETY ALERT SYMBOL
Indicates danger, warning or caution. May be used in
conjunction with other symbols or pictographs.
• HOT SURFACE WARNING
Do not touch a hot muffler or cylinder. You may get
burned. These parts get extremely hot from
operation. When turned off they remain hot for a short
time.
• WARNING - READ OPERATOR'S MANUAL
Read the operator’s manual(s) and follow all warnings
and safety instructions. Failure to do so can result in
serious injury to the operator and/or bystanders.
• WEAR EYE AND HEARING PROTECTION
WARNING:
Thrown objects and loud noise can cause
severe eye injury and hearing loss. Wear eye protection
meeting ANSI Z87.1-1989 standards and ear protection when
operating this unit. Use a full face shield when needed.
• KEEP BYSTANDERS AWAY
WARNING: Keep all bystanders, especially children
and pets, at least 50 feet (15 m.) from the operating area.
• THROWN OBJECTS AND ROTATING CUTTER CAN
CAUSE SEVERE INJURY
WARNING: Small objects can be propelled at high
speed, causing injury. Keep away from the rotating rotor.
SYMBOL MEANING
SYMBOL MEANING
• PRIMER BULB
Push primer bulb, fully and slowly, 10 times.
• UNLEADED FUEL
Always use clean, fresh unleaded fuel
• OIL
Refer to operator’s manual for the proper type of oil.
• ON/OFF STOP CONTROL
ON / START / RUN
• ON/OFF STOP CONTROL
OFF or STOP
3
• SHARP BLADE
WARNING: Sharp blade on cutting attachment
shield. To prevent serious injury, do not touch the line
cutting blade.
• Keep unit clean of vegetation and other materials. They may
become lodged between the cutting attachment and shield.
• To reduce fire hazard, replace a faulty muffler and spark arrestor.
Keep the engine and muffler free from grass, leaves, excessive
grease or carbon build up.
OTHER SAFETY WARNINGS
• Never store a fueled unit inside a building where fumes may
reach an open flame or spark.
• Allow the engine to cool before storing or transporting. Be sure to
secure the unit while transporting.
• Store the unit in a dry area, locked up or up high to prevent
unauthorized use or damage, out of the reach of children.
• Never douse or squirt the unit with water or any other liquid.
Keep handles dry, clean and free from debris. Clean after each
use, see Cleaning and Storage instructions.
•
Keep these instructions. Refer to them often and use them to instruct other
users. If you loan someone this unit, also loan them these instructions.
SAVE THESE INSTRUCTIONS
RECOMMENDED OIL TYPE
Using the proper type and weight of oil in the
crankcase is extremely important. Check the oil before
each use and change the oil regularly. Failure to use the correct
oil, or using dirty oil, can cause premature engine wear and
failure. Use a high-quality SAE 30 weight oil of API (American
Petroleum Institute) service class SF, SG, SH.
Adding Oil to Crankcase: Initial Use
NOTE: This unit is shipped without oil. In order to avoid
damage to the unit, put oil in the crankcase before
you attempt to start the unit.
Your unit is supplied with one 3.04 fluid oz. (90 ml.) bottle of SAE
30 SF, SG, SH oil (Fig. 6).
NOTE: Save the bottle of oil. It can be used to measure the
correct amount during future oil changes. See
Changing the Oil.
1. Unscrew the top of the bottle of oil and remove the paper
seal covering the opening. Replace the top. Next, cut the
tip off the funnel spout (Fig. 6).
2. Place the unit on a flat level surface (Fig. 7).
3. Remove the oil plug / dipstick from the crankcase (Fig. 8).
4. Pour the entire bottle of oil into the oil fill hole (Fig. 7).
NOTE: Never add oil to the fuel or fuel tank.
5. Wipe up any oil that may have spilled and reinstall the oil
fill plug / dipstick.
Check oil before each use and change as needed. Refer to
Changing the Oil.
RECOMMENDED FUEL TYPE
Old fuel is the primary reason for improper unit performance. Be
sure to use fresh, clean, unleaded gasoline.
NOTE: This is a four cycle engine. In order to avoid damage
to the unit, do not mix oil with gasoline.
Definition of Blended Fuels
Today's fuels are often a blend of gasoline and oxygenates such as ethanol, methanol or MTBE (ether).
Alcohol-blended fuel absorbs water. As little as 1% water in the fuel can make fuel and oil separate or
form acids when stored. Use fresh fuel (less than 60 days old), when using alcohol-blended fuel.
Using Blended Fuels
If you choose to use a blended fuel, or its use is unavoidable, follow recommended precautions:
• Always use fresh unleaded gasoline
• Use the fuel additive STA-BIL® or an equivalent
• Drain tank and run the engine dry before storing unit
Using Fuel Additives
The use of fuel additives, such as STA-BIL® Gas Stabilizer or an equivalent, will inhibit corrosion and
minimize the formation of gum deposits. Using a fuel additive can keep fuel from forming harmful
deposits in the carburetor for up to six (6) months. Add 0.8 oz. (23 ml.) of fuel additive per gallon of fuel
according to the instructions on the container. NEVER add fuel additives directly to the unit's gas tank.
FUELING THE UNIT
1. Remove the fuel cap (Fig. 9).
2. Place the gas container’s spout into the fill hole on the fuel
tank (Fig. 9) and fill the tank.
NOTE: Do not overfill the tank.
3. Wipe up any gasoline that may have spilled.
4. Reinstall the fuel cap.
5. Move the unit at least 30 ft. (9.1 m) from the fueling source and site before starting the engine.
NOTE: Dispose of the old gasoline in accordance to Federal, State and Local regulations.
ASSEMBLY INSTRUCTIONS
OIL AND FUEL INFORMATION
4
INSTALL CUTTING ATTACHMENT SHIELD
Use the following instructions if the cutting attachment shield on
your unit is not installed. Use only the instructions that apply to
the type of shaft and shield that your unit is equipped with.
CC4125
1. Place the cutting attachment shield onto the shaft housing.
Be sure the guard mounting bracket slides into the slot on
the edge of the cutting shield. Rotate the shield into place,
counterclockwise. The holes in the guard mounting bracket
and cutting attachment shield will line up (Fig. 1).
2. From inside the cutting attachment shield, push the square
bolt through the hole until the threaded end protrudes
through the guard mounting bracket (Fig. 2).
3. Put the washer on the bolt, then screw the wing nut onto
the bolt and tighten. Figure 3 shows the installation
process from underneath the unit.
CC4175
1. Slide the cutting attachment shield into the shield mount
on the cutting attachment. Align the screw holes in the
shield with the holes in the cutting attachment (Fig. 3).
2. Place a hex lock nut into one of the three recessed holes
on the top of the cutting attachment shield (Fig 4).
3. Install a screw into the hole from the bottom of the cutting
attachment shield and screw it into the nut installed in step
2 (Fig. 4). Do not tighten.
4. Repeat steps 2 and 3 until all three screws have been
started, then tighten securely.
ADJUST THE J-HANDLE
1. Loosen the screws.
2. Slide the J-handle in or out until the arrow/white line on the decal touches the clamp assembly
(Fig. 5). You must first loosen the screws if the handle is pre-installed.
3. While holding the unit in the operating position (Fig. 16), position the J-handle to the location that
provides you the best grip.
4. Tighten the clamp screws evenly, until the J-handle is secure.
STARTING AND STOPPING INSTRUCTIONS
STARTING INSTRUCTIONS
1. Check the oil level in the crankcase. Refer to Checking the Oil Level.
2. Fill the fuel tank with fresh, clean unleaded gasoline. Refer to Fueling the Unit.
NOTE: There is no need to turn the unit on. The On/Off Stop Control is in the ON (I) position
at all times (Fig. 10).
IF
COLD... For cold weather conditions (below 40°F), flip the Cold Weather Start Lever (Fig. 11)
down to the start/closed position and continue to step 3. DO NOT flip this lever down if
the temperature is above 40°F.
KNOW YOUR UNIT
Applications:
• Cutting grass and light weeds.
• Edging
• Decorative trimming around trees,
fences, etc.
Other optional accessories may be used
with your unit. Refer to Operating the
Rapid-Line™ System for a list of add-ons.
NOTE: The below illustration may
differ slightly from your
unit. For example, the
picture shows a straight
shaft. Your unit may have a
curved shaft.
CC4125
Primer
Bulb
Oil Fill Plug
Spark Plug
Air Filter Cover
Cutting Attachment
Shield
Fuel Cap
Throttle
Control
J-Handle
Cutting Attachment
Shaft Grip
On/Off Stop
Control
Shaft Housing
Starter Rope
Grip
Line Cutting
Blade
Muffler
Spark Arrestor
Muffler Guard
Rapid-Link™
CC4175
KNOW YOUR UNIT
Screws (4)
J-Handle
Fig. 5
Decal
Shaft Housing
Shield Mount
Cutting
Attachment
Shield
Cutting Attachment
Fig. 3
Nuts (3)
Recessed Holes
Hex Lock
Nut
Screws (3)
Fig. 4
Cutting
Attachment
Shield
Fig. 1
Washer
Fig. 2
WARNING:
To prevent serious personal injury,
never operate the trimmer without the cutting
attachment shield in place.
WARNING:
OVERFILLING THE CRANKCASE WITH OIL MAY CAUSE SERIOUS PERSONAL
INJURY. Check and maintain the proper oil level in the crank case; it is important and cannot be
overemphasized. Check the oil before each use and change it as needed. See Changing the Oil.
WARNING:
Add fuel in a clean, well ventilated outdoor area. Wipe up any spilled fuel
immediately. Avoid creating a source of ignition for spilt fuel. Do not start the engine until
fuel vapors dissipate.
WARNING:
Gasoline is extremely flammable. Ignited vapors may explode. Always stop
the engine and allow it to cool before filling the fuel tank. Do not smoke while filling the
tank. Keep sparks and open flames at a distance from the area.
WARNING:
Remove fuel cap slowly to avoid
injury from fuel spray. Never operate the unit
without the fuel cap securely in place.
Shaft
Housing
Guard
Mounting
Bracket
Fig. 7
Funnel
Spout
Fig. 6
Oil Fill Plug
Fig. 8
O-Ring
Oil Fill Hole
Gas Can Spout
Fig. 9
Fuel Cap
Fuel Tank
WARNING:
Operate this unit only in a well-ventilated outdoor area. Carbon monoxide
exhaust fumes can be lethal in a confined area.
WARNING:
Avoid accidental starting. Make sure you are in the starting position when
pulling the starter rope (Fig. 13). To avoid serious injury, the operator and unit must be
in a stable position while starting. Make sure that any Add-On item is installed correctly
and secure before starting the unit.
Top
Clamp
Bottom
Clamp
Middle
Clamp
Wing Nut
Guard Mounting
Bracket
Square
Bolt
Fill Level
5
STARTING AND STOPPING INSTRUCTIONS
3. Fully press and release the primer bulb 10 times,
slowly. Some amount of fuel should be visible in the
primer bulb and fuel lines (Fig. 11). If you can’t see
fuel in the bulb, press and release the bulb as many
times as it takes before you can see fuel in it.
4. With the unit in the starting position, do not squeeze
the throttle control (Fig. 12). Pull the starter rope out
a short distance, until you feel some resistance. This
is usually around 2-4 inches. Then pull the rope
smoothly and briskly. Repeat this 5 times. The
engine should start.
IF
COLD... For cold weather conditions (below 40°F), flip
the Cold Weather Start Lever back up to the
run/open position after the unit has started and
before squeezing the throttle control.
5. Squeeze the throttle control to warm up the engine
for 15 to 30 seconds. In cold weather, let the engine
warm up for 30 to 60 seconds.
IF... The engine does not start, go back to step 3.
IF...
The engine stops while you are squeezing the
throttle, go back to step 4.
STOPPING INSTRUCTIONS
1. Release your hand from the throttle control. Allow
the engine to cool down by idling.
2. Put the On/Off Stop Control in the OFF (O) position.
Fig. 11
Throttle
Control
Fig. 10
Starter
Rope
Fig. 12
Throttle
Control
Start/ On (I)
Stop/ Off (O)
Primer Bulb
Cold Weather
Start Lever
OPERATING INSTRUCTIONS
OPERATING THE RAPID-LINK™SYSTEM
The Rapid-Link™ system enables the use of these optional Add-Ons:
Mach IV
®
Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AF720
Hedge Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AH720
Brushcutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BC720*
Blower/ Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BT720
Blower Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BV720
Cultivator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GC720
Edger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LE720
Pole Saw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PS720
Straight Shaft Trimmer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SS725
Snow Thrower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST720
Turbo Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB720
*Do NOT use this attachment with an electric powered unit.
REMOVING THE CUTTING ATTACHMENT OR ADD-ON
1. Turn the knob counterclockwise to loosen (Fig. 13).
2. Press and hold the release button (Fig. 13).
3. While firmly holding the upper shaft housing, pull the cutting
attachment or add-on straight out of the Rapid-Link™
coupler (Fig. 14).
Installing the Cutting Attachment or Add-On
NOTE: Place the unit on the ground or on a work bench to
make add-on installation or removal easier.
1. Turn knob counterclockwise to loosen (Fig. 13).
2. While firmly holding the add-on, push it straight into the
Rapid-Link™ coupler (Fig. 14).
NOTE: Aligning the release button with the guide recess will
help installation (Fig. 13).
3. Turn the knob clockwise to tighten (Fig. 15).
For edging (when using the line head cutting attachment with
Rapid-Link™ models), lock the release button of the cutting
attachment into the 90° edging hole (Fig. 15).
HOLDING THE TRIMMER
Before operating the unit, stand in the operating position (Fig. 16).
Check for the following:
• The operator is wearing eye protection and proper clothing
• With a slightly-bent right arm, the operator’s right hand is holding the shaft grip
• The operator’s left arm is straight, the left hand holding the handle
OPERATING INSTRUCTIONS
WARNING:
Before you begin using any
attachment, read and understand the manual
that came with the attachment. Follow all safety
information contained within.
WARNING:
To avoid serious personal injury
and damage to the unit, shut the unit off before
removing or installing add-ons.
CAUTION:
Lock the release button in the
primary hole and securely tighten the knob
before operating this unit.
CAUTION:
Add-ons are to be used in the
primary hole only. Using the wrong hole could
lead to personal injury or damage to the unit.
WARNING:
Always wear eye, hearing, foot
and body protection to reduce the risk of injury
when operating this unit.
• The unit is at waist level
•
The cutting attachment is parallel to the ground and easily contacts the grass without the need to bend over
Some line breakage will occur from:
• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick, stalky weeds
• Forcing the line into objects such as walls or fence posts
TIPS FOR BEST TRIMMING RESULTS
• For best trimming results, operate unit at full throttle.
• Keep the cutting attachment parallel to the ground.
• Do not force the cutting attachment. Allow the tip of the line to do the cutting, especially along walls.
Cutting with more than the tip will reduce cutting
efficiency and may overload the engine.
• Cut grass over 8 inches (200 mm) by working from top to bottom in small increments to avoid
premature line wear or engine drag.
• Slowly move the trimmer into and out of the cutting area at the desired height. Move either in a
forward-backward or side-to-side motion. Cutting shorter lengths produces the best results.
• Trim only when grass and weeds are dry.
• The life of your cutting line is dependent upon:
• Proper adherence of explained trimming techniques
• What vegetation is cut
• Where vegetation is cut
For example, the line will wear faster when trimming against a
foundation wall as opposed to trimming around a tree.
DECORATIVE TRIMMING
Decorative trimming is accomplished by removing all vegetation
around trees, posts, fences and more.
Rotate the whole unit so that the cutting attachment is at a 30°
angle to the ground (Fig. 17).
Guide Recess
Fig. 13
Release
Button
Rapid-Link™Coupler
Upper Shaft
Housing
Fig. 14
Lower Shaft
Housing
Primary Hole
Knob
Fig. 15
90˚ Edging Hole
(Trimmer Only)
Fig. 16
Fig. 17
MAINTENANCE AND REPAIR INSTRUCTIONS
MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the frequency stated in the table. These procedures
should also be a part of any seasonal tune-up.
NOTE: Some maintenance procedures may require special tools or skills. If you are unsure about
these procedures take your unit to any non-road engine repair establishment, individual or
authorized service dealer.
NOTE: Maintenance, replacement, or repair of the emission control devices and system may be
performed by any non-road engine repair establishment, individual or authorized service dealer.
WARNING:
To prevent serious injury, never perform maintenance or repairs with unit
running. Always service and repair a cool unit. Disconnect the spark plug wire to ensure
that the unit cannot start.
FREQUENCY MAINTENANCE REQUIRED SEE
Before starting engine Fill fuel tank with fresh fuel
Check oil
p. 4
p. 6
Every 10 hours Clean and re-oil air filter p. 6
1st change at 10 hours
2nd change at 25 hours
Every 25 hours after
Change oil
Change oil
Clean spark arrestor
p. 6
p. 6
p. 7
10 hours on new engine
Every 25 hours
Every 25 hours
Check rocker arm to valve clearance and adjust
Check rocker arm to valve clearance and adjust
Check spark plug condition and gap
p. 6
p. 6
p. 6
FIXED LINE INSTALLATION
Always use original equipment manufacturer 0.105 inch (2.67 mm)
replacement line. Lines other than those specified may make the
engine overheat or fail.
To install the trimming line:
1. Insert each end of the replacement line into the holes on
either side of retention hook (Fig. 18).
2. Push the ends through until they stick out of the sides of
the head (Fig. 19).
3. Pull the ends through making sure that the ends are of
equal length and the middle of the line is centered between
the insertion holes (Fig. 20).
4. If the ends are not of equal length, push the longer end
back through the head part way and pull the shorter end to
compensate. Repeat until both ends are the same length.
5. Push the trimmer line until it lies flat against the cutting
head (Fig. 21). Make sure the two lengths of cutting line
are of equal length. If they are not, adjust until they are.
WARNING:
Never use metal-reinforced line,
wire, chain, or rope. These can break off and
become dangerous projectiles.
Fig. 18
Fig. 19
Fig. 20
Fig. 21
WARNING:
Always use the correct line length when installing trimming line on the unit.
If the two lengths of cutting line are not of equal length, the unit may develop a vibration.
Run/ Open
Close/ Start
6
CHECKING THE OIL LEVEL
The importance of checking and maintaining the proper oil level in
the crankcase cannot be overemphasized. Check oil before each
use:
1. Stop the engine and allow oil to drain into the crankcase.
2. Place the unit on a flat, level surface to get a proper oil
level reading.
3. Keep dirt, grass clippings and other debris out of the
engine. Clean the area around the oil fill plug/dipstick
before removing it.
4. Remove the oil fill plug/dipstick and wipe off oil. Reinsert it
all the way back in.
5. Remove the oil fill plug/dipstick and check the oil level. Oil
should be up to the top of the dipstick (Fig. 22).
6. If the level is low, add a small amount of oil to the oil fill
hole and recheck (Fig. 23). Repeat this procedure until the
oil level reaches the top of the dipstick.
NOTE: Do not overfill the unit.
NOTE: Make sure the O-ring is in place on the oil fill
plug/dipstick when checking and changing the oil
(Fig. 22).
CHANGING THE OIL
For a new engine, change the oil after the first 10 hours of
operation. Change the oil while the engine is still warm. The oil will
flow freely and carry away more impurities.
1. Unplug spark plug boot to prevent accidental starting.
2. Remove the oil fill plug/dipstick.
3. Pour the oil out of the oil fill hole and into a container by
tipping the unit to a vertical position (Fig. 24). Allow ample
time for complete drainage.
4. Wipe up any oil residue on the unit and clean up any oil
that may have spilled. Dispose of the oil according to
Federal, State and local regulations.
5. Refill the crankcase with 3.04 fluid ounce (90 ml) of SAE 30
SF, SG, SH oil.
NOTE: Use the bottle and spout saved from initial use to
measure the correct amount of oil. The top of the
label on the bottle measures approximately 3.4
ounces (100 ml) (Fig. 25). Check the level with the
dipstick. If the level is low, add a small amount of oil
and recheck. Do not overfill (Fig. 25).
6. Replace the oil fill plug/dipstick.
7. Reconnect the spark plug boot.
AIR FILTER MAINTENANCE
Cleaning the Air Filter
Clean and re-oil the air filter every 10 hours of operation. It is an
important item to maintain. Failure to maintain your air filter
properly can result in poor performance or can cause permanent
damage to your engine.
1. Open the air filter cover. Push the tab on the left side of the
cover inward. Then pull the air filter cover out and to the
right (Fig. 26).
NOTE: It may be necessary to remove the fuel cap to
completely remove the air filter cover.
2. Remove the air filter (Fig. 26).
3. Wash the filter in detergent and water (Fig. 27). Rinse the
filter thoroughly and allow it to dry.
4. Apply enough clean SAE 30 motor oil to lightly coat the
filter (Fig. 28).
5. Squeeze the filter to spread and remove excess oil (Fig. 29).
6. Replace the filter (Fig. 30).
NOTE: If the unit is operated without the air filter, you will
VOID the warranty.
7. Reinstall the air filter cover. Position the hooks on the right
side of the air filter cover into the slots at the right side of
the back plate (Fig. 31, no.1).
8. Swing the cover to the left until the tab on the air filter cover
snaps into place in the slot on the back plate (Fig. 31, no. 2).
CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable. An idle adjustment screw
is reached though a hole in the top of the engine cover (Fig. 32).
NOTE: Careless adjustments can seriously damage your
unit. An authorized service dealer should make
carburetor adjustments.
Check Fuel
Old fuel is usually the reason for improper unit performance. Drain
and refill the tank with fresh fuel prior to making any adjustments.
Refer to Oil and Fuel Information.
MAINTENANCE AND REPAIR INSTRUCTIONS
Clean Air Filter
The condition of the air filter is important to the operation of the
unit. A dirty air filter will restrict air flow. This is often mistaken for
an out of adjustment carburetor. Check the condition of the air
filter before adjusting the idle speed screw. Refer to Air Filter
Maintenance.
Adjust Idle Speed Screw
If, after checking the fuel and cleaning the air filter, the engine still will not idle, adjust the idle speed
screw as follows:
1. Start the engine and let it run at a high idle for a minute to warm up. Refer to Starting/Stopping
Instructions.
2. Release the throttle trigger and let the engine idle. If the engine stops, insert a small phillips or flat
blade screwdriver into the hole in the air filter/muffler cover (Fig. 32). Turn the idle speed screw in,
clockwise, 1/8 of a turn at a time (as needed) until the engine idles smoothly.
NOTE: The cutting attachment should not rotate when the engine idles.
3. If the cutting attachment rotates when the engine idles,
turn the idle speed screw counterclockwise 1/8 of a turn
at a time (as needed), to reduce idle speed.
Checking the fuel, cleaning the air filter, and adjusting the idle
speed should solve most engine problems. If not and all of the
following are true:
• the engine will not idle
• the engine hesitates or stalls on acceleration
• there is a loss of engine power
Have the carburetor adjusted by an authorized service dealer.
ROCKER ARM CLEARANCE
This requires disassembly of the engine. If you feel unsure or
unqualified to perform this, take the unit to an authorized service
center.
NOTE: Inspect the valve to rocker arm clearance with a
feeler gauge after the first 10 hours of operation and
then every 25 hours of operation thereafter.
• The engine must be cold when checking or adjusting the valve
clearance.
• This task should be performed inside in a clean, dust free
area.
1. Remove the five (5) screws on back of the engine cover
with a Flat-head or T-20 Torx screwdriver (Fig. 33).
2. Remove the screw behind the engine cover with a Flathead or T-25 Torx screwdriver (Fig. 34).
3. Disconnect the spark plug wire.
4. Clean dirt from around the spark plug. Remove the spark
plug from the cylinder head by turning a 5/8 in. socket
counterclockwise.
5. Remove the engine cover (Fig. 33 & 34).
6. Clean dirt from around the rocker arm cover. Remove the
screw holding the rocker arm cover with a large flat blade
screwdriver or Torx T-25 bit (Fig. 35). Remove the rocker
arm cover and gasket.
7. Pull the starter rope slowly to bring the piston to the top of
its travel, (known as top dead center). Check that:
• The piston is at the top of its travel while looking in the
spark plug hole (Fig. 36)
• Both rocker arms move freely, and both valves are closed
If these statements are not true, repeat this step.
8. Slide the feeler gauge between the rocker arm and the
valve return spring. Measure the clearance between the
valve stem and rocker arm (Fig. 37). Measure both the
intake and exhaust valves.
The recommended clearance for both intake and exhaust is .003
– .006 in. (.076 – 0.152 mm). Use a standard automotive .005 in.
(0.127 mm) feeler gauge. The feeler gauge should slide between
the rocker arm and valve stem with a slight amount of resistance,
without binding. Figure 38 and 39 show how to measure the
clearance.
9. If the clearance is not within specification:
a. Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut
driver (Fig. 37).
• To increase clearance, turn the adjusting nut
counterclockwise.
• To decrease clearance, turn the adjusting nut clockwise.
b. Recheck both clearances, and adjust as necessary.
10. Reinstall the rocker arm cover using a new gasket. Torque
the screw to 20–30 in•lb (2.2–3.4 N•m).
11. Reinstall the engine cover. Check alignment of the cover
before tightening the screws. Tighten screws.
12. Check the spark plug and reinstall. See Replacing the Spark Plug.
13. Replace the spark plug wire.
REPLACING THE SPARK PLUG
Use a replacement part number 791-180852B spark plug. The correct air gap is 0.025 in. (0.635 mm.).
Remove the plug after every 25 hours of operation and check its condition.
1. Stop the engine and allow it to cool. Grasp the plug wire firmly and pull the cap from the spark
plug.
2. Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning a
5/8 in. socket counterclockwise.
Full
Fig. 22
O-Ring Oil Fill Plug/Dipstick
Oil Fill Hole
Fig. 23
Top of
Dipstick
Add 1.4-1.5 Oz.
(41-44 ml)
Fig. 24
Fill Level
Fig. 25
Oil Fill
Plug/Dipstick
WARNING:
To prevent extensive engine wear
and damage to the unit, always maintain the
proper oil level in the crankcase. Never operate
the unit with the oil level below the bottom of
the dipstick.
CAUTION:
Wear gloves to prevent injury
when handling the unit.
WARNING:
To avoid serious personal injury,
always turn the unit off and allow it to cool
before you clean or service it.
Tab
Fig. 26
Air Filter Air Filter Cover
Fig. 27
Fig. 28
Fig. 29
Air Filter Cover
Fig. 31
Cover Hinge
WARNING:
To avoid serious personal injury,
always turn the unit off and allow it to cool
before you clean or service it.
Slots
Fig. 30
Back Plate
Idle Ajustment Screw
Fig. 32
Remove
Screws
Fig. 33
Muffler
Fig. 34
Screw
Rocker Arm Cover
Fig. 35
Spark Plug Hole
Adjusting Nuts
Fig. 36
INTAKE
Exhaust Valve
Stem
Fig. 37
Exhaust
Adjusting Nut
WARNING:
To avoid serious personal injury,
always turn the unit off and allow it to cool
before you clean or service it.
WARNING:
To avoid serious personal injury, always turn the unit off and allow it to
cool before you clean or service it.
Feeler
Gauge
Exhaust
Rocker Arm
0.003–0.006 in.
(0.076–0.152 mm)
Intake Valve
Stem
Feeler
Gauge
Rocker Arms
EXHAUST
Engine
Cover
Remove Screws
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