Briggs & Stratton NXT2242, NXT2346, NXT2652, 400000 Professional Series, 440000 Intek Operator's Manual

...

Not for

Reproduction

Operator’s Manual

Manual del Operario

Manuel de l’opérateur

Model 400000

Intekt Extended Life Seriest Professional Seriest

Model 440000

Intekt Extended Life Seriest Professional Seriest

Model 490000

Extended Life Seriest Professional Seriest

English

Form No. 278776TRI

Revision: G

Español Français

es fr

Not for

Reproduction

BRIGGSandSTRATTON.COM

Not for

Reproduction

General Information

Not for

Reproduction

This manual contains safety information to make you aware of the hazards and risks associated with engines and how to avoid them. It also contains instructions for the proper use and care of the engine. Because Briggs & Stratton Corporation does not necessarily know what equipment this engine will power, it is important that you read and understand these instructions and the instructions for the equipment. Save these

original instructions for future reference.

For replacement parts or technical assistance, record below the engine model, type, and code numbers along with the date of purchase. These numbers are located on your engine (see the Features and Controls page).

Date of purchase:

MM/DD/YYYY

Engine model:

Model: Code:Type:

Power Rating

The gross power rating for individual gas engine models is labeled in accordance with SAE (Society of Automotive Engineers) code J1940 (Small Engine Power & Torque Rating Procedure), and rating performance has been obtained and corrected in accordance with SAE J1995 (Revision 2002--05). Torque values are derived at 3060 RPM; horsepower values are derived at 3600 RPM. The gross power curves can be viewed at www.BRIGGSandSTRATTON.COM. Net power values are taken with exhaust and air cleaner installed whereas gross power values are collected without these attachments. Actual gross engine power will be higher than net engine power and is affected by, among other things, ambient operating conditions and engine--to--engine variability. Given the wide array of products on which engines are placed, the gas engine may not develop the rated gross power when used in a given piece of power equipment. This difference is due to a variety of factors including, but not limited to, the variety of engine components (air cleaner, exhaust, charging, cooling, carburetor, fuel pump, etc.), application limitations, ambient operating conditions (temperature, humidity, altitude), and engine--to--engine variability. Due to manufacturing and capacity limitations, Briggs & Stratton may substitute an engine of higher rated power for this Series engine.

Operator Safety

SAFETY AND CONTROL SYMBOLS

Fire

Fast

Choke

Hazardous

Chemical

The safety alert symbol is used to identify safety information about hazards that can result in personal injury. A signal word (DANGER, WARNING, or CAUTION) is used with the alert symbol to indicate the likelihood and the potential severity of injury. In addition, a hazard symbol may be used to represent the type of hazard.

Moving Parts

Stop

On Off

Read Manual

Oil

Explosion

Fuel Shutoff

Hot Surface

DANGER indicates a hazard which, if not avoided, will result in death or

serious injury.

WARNING indicates a hazard which, if not avoided, could result in death or

serious injury.

Toxic Fumes

Shock

Kickback

Frostbite

Slow

Fuel

Wear Eye

Protection

WARNING

The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

WARNING

Briggs & Stratton Engines are not designed for and are not to be used to power: fun-karts; go-karts; children’s, recreational, or sport all-terrain vehicles (ATVs); motorbikes; hovercraft; aircraft products; or vehicles used in competitive events not sanctioned by Briggs & Stratton. For information about competitive racing products, see www.briggsracing.com. For use with utility and side-by-side ATVs, please contact Briggs & Stratton Engine Application Center, 1-866-927-3349. Improper engine application may result in serious injury or death.

NOTICE: This engine was shipped from Briggs & Stratton without oil. Before you start the engine, make sure you add oil according to the instructions in this manual. If you start the engine without oil, it will be damaged beyond repair and will not be covered under warranty.

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

When Adding Fuel

 Turn engine off and let engine cool at least 2 minutes before removing the fuel

cap.

 Fill fuel tank outdoors or in well-ventilated area.  Do not o verfill fuel tank. To allow for expansion of the fuel, do not fill above the

bottom of the fuel tank neck.

 Keep fuel away from sparks, open flames, pilot lights, heat, and other ignition

sources.

 Check fuel lines, tank, cap, and fittings frequently for cracks or leaks.

Replace if necessary

 If fuel spills, wait until it evaporates before starting engine.

When Starting Engine

 Ensure that spark plug, muffler, fuel cap and air cleaner (if equipped) are in

place and secured.

 Do not crank engine with spark plug removed.  If engine floods, set choke (if equipped) to OPEN/RUN position, move throttle

(if equipped) to FAST position and crank until engine starts.

When Operating Equipment

 Do not tip engine or equipment at angle which causes fuel to spill.  Do not choke the carburetor to stop engine.  Never start or run the engine with the air cleaner assembly (if equipped) or the

air filter (if equipped) removed.

When Changing Oil

 When you drain the oil from the top oil fill tube, the fuel tank must be empty or

fuel can leak out and result in a fire or explosion.

When Tipping Unit for Maintenance

 When performing maintenance that requires the unit to be tipped, the fuel tank

must be empty or fuel can leak out and result in a fire or explosion.

When Transporting Equipment

 Transport with fuel tank EMPTY or with fuel shut-off valve OFF.

When Storing Fuel Or Equipment With Fuel In Tank

 Store away from furnaces, stoves, water heaters or other appliances that have

pilot lights or other ignition sources because they can ignite fuel vapors.

CAUTION indicates a hazard which, if not avoided, could result in minor or

moderate injury.

WARNING

NOTICE indicates a situation that could result in damage to the product.

WARNING

Certain components in this product and its related accessories contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands after handling.

Starting engine creates sparking. Sparking can ignite nearby flammable gases. Explosion and fire could result.

 If there is natural or LP gas leakage in area, do not start engine.  Do not use pressurized starting fluids because vapors are flammable.

4 BRIGGSandSTRATTON.COM

WARNING

Not for

Reproduction

Engines give off carbon monoxide, an odorless, colorless, poison gas. Breathing carbon monoxide can cause nausea, fainting or death.

 Start and run engine outdoors.  Do not start or run engine in enclosed area, even if doors or windows are open.

WARNING

Unintentional sparking can result in fire or electric shock. Unintentional start-up can result in entanglement, traumatic

amputation, or laceration. Fire hazard

WARNING

Rapid retraction of starter cord (kickback) will pull hand and arm toward engine faster than you can let go.

Broken bones, fractures, bruises or sprains could result.

 When starting engine, pull the starter cord slowly until resistance is felt and then

pull rapidly to avoid kickback.

 Remove all external equipment/engine loads before starting engine.  Direct-coupled equipment components such as, but not limited to, blades,

impellers, pulleys, sprockets, etc., must be securely attached.

WARNING

Rotating parts can contact or entangle hands, feet, hair, clothing, or accessories.

Traumatic amputation or severe laceration can result.

 Operate equipment with guards in place.  Keep hands and feet away from rotating parts.  Tie up long hair and remove jewelry.  Do not wear loose-fitting clothing, dangling drawstrings or items that could

become caught.

WARNING

Running engines produce heat. Engine parts, especially muffler, become extremely hot.

Severe thermal burns can occur on contact. Combustible debris, such as leaves, grass, brush, etc. can catch fire.

 Allow muffler, engine cylinder and fins to cool before touching.  Remove accumulated debris from muffler area and cylinder area.  It is a violation of California Public Resource Code, Section 4442, to use or

operate the engine on any forest-covered, brush-covered, or grass-covered land unless the exhaust system is equipped with a spark arrester, as defined in Section 4442, maintained in effective working order. Other states or federal jurisdictions may have similar laws. Contact the original equipment manufacturer, retailer, or dealer to obtain a spark arrester designed for the exhaust system installed on this engine.

Before performing adjustments or repairs:

 Disconnect the spark plug wire and keep it away from the spark plug.  Disconnect battery at negative terminal (only engines with electric start.)  Use only correct tools.  Do not tamper with governor spring, links or other parts to increase engine

speed.

 Replacement parts must be of the same design and installed in the same

position as the original parts. Other parts may not perform as well, may damage the unit, and may result in injury.

 Do not strike the flywheel with a hammer or hard object because the flywheel

may later shatter during operation.

When testing for spark:

 Use approved spark plug tester.  Do not check for spark with spark plug removed.

Features and Controls

Not for

Reproduction

Compare the illustration various features and controls.

A. Engine Identification

Model Type Code

B. Spark Plug C. Air Cleaner D. Dipstick E. Oil Drain Plug F. Rotating Screen G. Oil Filter H. Electric Starter I. Carburetor J. Fuel Filter (optional) K. Fuel Pump (optional) L. Quick Oil Drain (optional) M. Oil Cooler (optional) N. Electronic Control Unit (optional)

with your engine to familiarize yourself with the location of

Operation

Oil capacity (see the Specifications section)

Oil Recommendations

We recommend the use of Briggs & Stratton Warranty Certified oils for best performance. Other high-quality detergent oils are acceptable if classified for service SF, SG, SH, SJ or higher. Do not use special additives.

Outdoor temperatures determine the proper oil viscosity for the engine. Use the chart to select the best viscosity for the outdoor temperature range expected.

°F °C

SAE 30

10W-30

Synthetic 5W-30

5W-30

Fuel Recommendations

Fuel must meet these requirements:

 Clean, fresh, unleaded gasoline.  A minimum of 87 octane/87 AKI (91 RON). High altitude use, see below.  Gasoline with up to 10% ethanol (gasohol) is acceptable.

CAUTION: Do not use unapproved gasolines, such as E15 and E85. Do not mix oil in gasoline or modify the engine to run on alternate fuels. Use of unapproved fuels will damage the engine components and void the engine warranty.

To protect the fuel system from gum formation, mix a fuel stabilizer into the fuel. See Storage. All fuel is not the same. If starting or performance problems occur, change fuel providers or change brands. This engine is certified to operate on gasoline. The emissions control system for this engine is EM (Engine Modifications).

High Altitude

At altitudes over 5,000 feet (1524 meters), a minimum 85 octane/85 AKI (89 RON) gasoline is acceptable. To remain emissions compliant, high altitude adjustment is required. Operation without this adjustment will cause decreased performance, increased fuel consumption, and increased emissions. See an authorized Briggs & Stratton Dealer for high altitude adjustment information.

Operation of the engine at altitudes below 2,500 feet (762 meters) with the high altitude kit is not recommended.

How To Add Fuel - Figure

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

When Adding Fuel

 Turn engine off and let engine cool at least 2 minutes before removing the fuel

cap.

 Fill fuel tank outdoors or in well-ventilated area.  Do not o verfill fuel tank. To allow for expansion of the fuel, do not fill above the

bottom of the fuel tank neck.

 Keep fuel away from sparks, open flames, pilot lights, heat, and other ignition

sources.

 Check fuel lines, tank, cap, and fittings frequently for cracks or leaks.

Replace if necessary

 If fuel spills, wait until it evaporates before starting engine.

1. Clean the fuel cap area of dirt and debris. Remove the fuel cap (A, Figure 3).

2. Fill the fuel tank (B) with fuel. To allow for expansion of the fuel, do not fill above the bottom of the fuel tank neck (C).

3. Reinstall the fuel cap.

* Below 40°F(4°C) the use of SAE 30 will result in hard starting. ** Above 80°F(27°C) the use of 10W-30 may cause increased oil consumption. Check

oil level more frequently.

How To Check/Add Oil - Figure

Before adding or checking the oil

 Place engine level.  Clean the oil fill area of any debris.

1. Remove the dipstick (A) and wipe with a clean cloth (Figure 2).

2. Insert and tighten the dipstick.

3. Remove the dipstick and check the oil level. It should be at the FULL mark (B)onthe dipstick.

4. If low, add oil slowly into the engine oil fill (C). Do not overfill. After adding oil, wait one minute and then recheck the oil level.

Note: Do not add oil at the quick oil drain (L, Figure 1) (if equipped).

5. Replace and tighten the dipstick.

Oil Pressure

If the oil pressure is too low, a pressure switch (if equipped) will either stop the engine or activate a warning device on the equipment. If this occurs, stop the engine and check the oil level with the dipstick.

If the oil level is below the ADD mark, add oil until it reaches the FULL mark. Start the engine and check for proper pressure before continuing to operate.

If the oil level is between the ADD and FULL marks, do not start the engine. Contact an Authorized Briggs & Stratton Dealer to have the oil pressure problem corrected.

How To Start The Engine - Figure

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

When Starting Engine

 Ensure that spark plug, muffler, fuel cap and air cleaner (if equipped) are in

place and secured.

 Do not crank engine with spark plug removed.  If engine floods, set choke (if equipped) to OPEN/RUN position, move throttle

(if equipped) to FAST position and crank until engine starts.

WARNING

Engines give off carbon monoxide, an odorless, colorless, poison gas. Breathing carbon monoxide can cause nausea, fainting or death.

 Start and run engine outdoors.  Do not start or run engine in enclosed area, even if doors or windows are open.

6 BRIGGSandSTRATTON.COM

Determine The Starting System

Not for

Reproduction

Before starting the engine, you must determine the type of starting system that is on your engine. Your engine will have one of the following types.

 Electronic Fuel Management System: This features an Electronic Control Unit that

monitors engine and temperature conditions. It does not have a manual choke or a primer.

 Choke System: This features a choke to be used for starting in cool temperatures.

Some models will have a separate choke control while others will have a combination choke/throttle control. This type does not have a primer.

To start your engine, follow the instructions for your type of starting system. Note: Some engines and equipment have remote controls. See the equipment manual

for location and operation of remote controls.

Electronic Fuel Management System - Figure

1. Check the oil level. See the How To Check/Add Oil section.

2. Make sure equipment drive controls, if equipped, are disengaged.

3. Turn the fuel shut-off valve (A), if equipped, to the on position (Figure 4).

4. Move the throttle control (B)tothefast

position.

5. Turn the electric start switch (D) to the on/start position (Figure 4). NOTE: If the engine does not start after repeated attempts, go to

BRIGGSandSTRATTON.COM or call 1-800-233-3723 (in USA). NOTICE: To extend the life of the starter, use short starting cycles (five seconds

maximum). Wait one minute between starting cycles.

Choke System - Figure

1. Check the oil level. See the How To Check/Add Oil section.

2. Make sure equipment drive controls, if equipped, are disengaged.

position. Operate the engine in the fast

3. Turn the fuel shut-off valve (A), if equipped, to the on position (Figure 4).

4. Move the throttle control (B)tothefast position.

5. Move the choke control (C), or the combination choke/throttle lever, to the choke

position.

Note: Choke is usually unnecessary when restarting a warm engine.

6. Turn the electric start switch (D) to the on/start position (Figure 4).

NOTE: If the engine does not start after repeated attempts, go to

BRIGGSandSTRATTON.COM or call 1-800-233-3723 (in USA). NOTICE: To extend the life of the starter, use short starting cycles (five seconds

maximum). Wait one minute between starting cycles.

7. As the engine warms up, move the choke control (C)totherun

How To Stop The Engine - Figure

position. Operate the engine in the fast

position.

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

 Do not choke the carburetor to stop engine.

1. Move the throttle control to the slow position. Turn the key switch (D) to the off

position (Figure 4). Remove the key and keep in a safe place out of the reach of children.

2. After the engine stops, turn the fuel shut-off valve (A), if equipped, to the closed

position.

Maintenance

We recommend that you see any Briggs & Stratton Authorized Dealer for all maintenance and service of the engine and engine parts. NOTICE: All the components used to build this engine must remain in place for proper operation.

WARNING: When performing maintenance that requires the unit to be

tipped, the fuel tank must be empty or fuel can leak out and result in a fire or explosion.

Emissions Control

Maintenance, replacement, or repair of the emissions control devices and systems may be performed by any non-road engine repair establishment or individual.

However, to obtain “no charge” emissions control service, the work must be performed by a factory authorized dealer. See the Emissions Warranty.

WARNING

Unintentional sparking can result in fire or electric shock. Unintentional start-up can result in entanglement, traumatic

amputation, or laceration. Fire hazard

Before performing adjustments or repairs:

speed.

 Replacement parts must be of the same design and installed in the same

position as the original parts. Other parts may not perform as well, may damage the unit, and may result in injury.

 Do not strike the flywheel with a hammer or hard object because the flywheel

may later shatter during operation.

When testing for spark:

 Use approved spark plug tester.  Do not check for spark with spark plug removed.

Maintenance Chart

First 5 Hours

 Change oil

Every8HoursorDaily

 Check engine oil level  Clean area around muffler and controls  Clean finger guard/rotating screen

Every 25 Hours or Annually

 Clean air filter  Clean pre-cleaner

Every 50 Hours or Annually

 Change engine oil  Replace oil filter (if equipped)  Check muffler and spark arrester

Every 100 Hours or Annually

 Change engine oil  Replace oil filter

Annually

 Replace air filter  Replace pre-cleaner  Replace spark plugs  Clean air cooling system  Replace fuel filter  Check valve clearance

In dusty conditions or when airborne debris is present, clean more often.

Not required unless engine performance problems are noted.

Only engines without oil filter.

Engines without oil filter or with standard black oil filter (see Specifications page for part number).

Engines with high-efficiency yellow or orange oil filter (see Specifications page for part number).

Electronic Fuel Management System

Not for

Reproduction

The Electronic Fuel Management System monitors engine temperature, engine speed, and battery voltage to adjust the choke during engine starting and warm up. There are no adjustments on the system. If starting or operation problems occur, contact an Authorized Briggs & Stratton Dealer.

NOTICE: Make sure to follow the steps below or the Electronic Fuel Management System could be damaged.

 Never start the engine if the battery cables are loose.  Turn the key to the off position before disconnecting, removing and/or installing the

battery.

 Never use a battery charger to start the engine.  Never disconnect the battery cables while the engine is running.  When connecting the battery cables, first connect the positive (+) cable and then

connect the negative (--) cable to the battery.

 When charging the battery, turn the ignition switch to the off position and disconnect

the negative (--) battery cable from the battery.

 Do not spray water directly on the Electronic Control Unit.

Carburetor Adjustment

Never make adjustments to the carburetor. The carburetor was set at the factory to operate efficiently under most conditions. However, if adjustments are required, see a Briggs & Stratton Authorized Dealer for service.

NOTICE: The manufacturer of the equipment on which this engine is installed specifies the top speed at which the engine will be operated. Do not exceed this speed.

How To Replace The Spark Plug - Figure

Check the gap (A, Figure 5) with a wire gauge (B). If necessary, reset the gap. Install and tighten the spark plug to the recommended torque. For gap setting or torque, see the Specifications section.

Note: In some areas, local law requires using a resistor spark plug to suppress ignition signals. If this engine was originally equipped with a resistor spark plug, use the same type for replacement.

Inspect Muffler And Spark Arrester

WARNING

Running engines produce heat. Engine parts, especially muffler, become extremely hot.

Severe thermal burns can occur on contact. Combustible debris, such as leaves, grass, brush, etc. can catch fire.

Exhaust system parts are installed by the equipment manufacturer. For specific maintenance and replacement information, contact the equipment manufacturer.

Remove accumulated debris from muffler area and cylinder area. Inspect the muffler for cracks, corrosion, or other damage. Remove the spark arrester, if equipped, and inspect for damage or carbon blockage. If damage is found, install replacement parts before operating.

WARNING: Replacement parts must be of the same design and installed

in the same position as the original parts. Other parts may not perform as well, may damage the unit, and may result in injury.

How To Change The Oil - Figure

Used oil is a hazardous waste product and must be disposed of properly. Do not discard with household waste. Check with your local authorities, service center, or dealer for safe disposal/recycling facilities.

6 7

Remove Oil

1. With engine off but still warm, disconnect the spark plug wire (A) and keep it away from the spark plug (Figure 6).

2. Remove the dipstick (D).

Standard Oil Drain Plug

1. Remove the oil drain plug (B). Drain the oil into an approved container.

Note: Any of the oil drain plugs shown below may be installed in the engine.

2. After the oil has drained, install and tighten the oil drain plug.

Optional Quick Oil Drain

1. Disconnect the oil drain hose ( G, Figure 6) from the side of the engine.

2. Turn and remove the oil drain cap (H). Carefully lower the quick oil drain (I)intoan approved container (J).

3. After the oil has drained, install the oil drain cap. Attach the oil drain hose to the side of the engine.

Change The Oil Filter (if equipped)

For replacement intervals, see the Maintenance chart.

1. Drain the oil from the engine. See Remove Oil section.

2. Remove the oil filter (C) and dispose of properly. See Figure 7.

3. Before you install the new oil filter, lightly lubricate the oil filter gasket with fresh, clean oil.

4. Install t he oil filter by hand until the gasket contacts the oil filter adapter, then tighten theoilfilter1/2to3/4turns.

5. Add oil. See Add Oil section.

6. Start and run the engine. As the engine warms up, check for oil leaks.

7. Stop the engine and check t he oil level. It should be at the FULL mark on the dipstick.

Add Oil

 Place engine level.  Clean the oil fill area of any debris.  See the Specifications section for oil capacity.

1. Remove the dipstick (D) and wipe with a clean cloth (Figure 6).

2. Pour the oil slowly into the engine oil fill (E). Do not overfill. After adding oil, wait one minute and then check the oil level.

3. Install and tighten the dipstick.

4. Remove the dipstick and check the oil level. It should be at the FULL mark (F)onthe dipstick.

5. Install and tighten the dipstick.

How To Service The Air Filter - Figure

8 9

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

 Never start or run the engine with the air cleaner assembly (if equipped) or the

air filter (if equipped) removed.

NOTICE: Do not use pressurized air or solvents to clean the filter. Pressurized air can damage the filter and solvents will dissolve the filter.

The air filter system uses either a flat or oval cartridge. Some models are also equipped with a pre-cleaner that can be washed and reused.

Flat Air Filter

1. Remove the cover (A, Figure 8).

2. Remove the filter (C) and the pre-cleaner (B).

3. To loosen debris, gently tap the filter on a hard surface. If the filter is excessively dirty, replace with a new filter.

4. Wash the pre-cleaner in liquid detergent and water. Then allow it to thoroughly air dry. Do not oil the pre-cleaner.

5. Assemble the dry pre-cleaner and the filter into the engine base (D).

6. Install the cover.

Oval Air Filter

1. Remove the cover (A, Figure 9).

2. To remove the filter (B), lift the end of the filter.

3. Remove the pre-cleaner (C), if equipped, from the filter.

4. To loosen debris, gently tap the filter on a hard surface. If the filter is excessively dirty, replace with a new filter.

5. Wash the pre-cleaner in liquid detergent and water. Then allow it to thoroughly air dry. Do not oil the pre-cleaner.

6. Assemble the dry pre-cleaner to the filter.

7. Install the filter into the engine base (D) and push down until the filter snaps in place.

8. Install the cover.

BRIGGSandSTRATTON.COM

How To Replace The Fuel Filter - Figure

Not for

Reproduction

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

Troubleshooting

Need Assistance? Go to BRIGGSandSTRATTON.COM or call 1-800-233-3723.

 Keep fuel away from sparks, open flames, pilot lights, heat, and other ignition

sources.

 Check fuel lines, tank, cap, and fittings frequently for cracks or leaks.

Replace if necessary.

 Before replacing the fuel filter, drain the fuel tank or close the fuel shut-off valve.  Replacement parts must be the same and installed in the same position as the

original parts.

 If fuel spills, wait until it evaporates before starting engine.

1. Before replacing the fuel filter (A, Figure 10), if equipped, drain the fuel tank or close the fuel shut-off valve. Otherwise, fuel can leak out and cause a fire or explosion.

2. Use pliers to squeeze tabs (B) on the clamps (C), then slide the clamps away from the fuel filter. Twist and pull the fuel lines (D) off of the fuel filter.

3. Check the fuel lines for cracks or leaks. Replace if necessary.

4. Replace the fuel filter with an original equipment replacement filter.

5. Secure the fuel lines with the clamps as shown.

How To Clean The Air Cooling System - Figure

WARNING

Running engines produce heat. Engine parts, especially muffler, become extremely hot.

Severe thermal burns can occur on contact. Combustible debris, such as leaves, grass, brush, etc. can catch fire.

 Allow muffler, engine cylinder and fins to cool before touching.  Remove accumulated debris from muffler area and cylinder area.

NOTICE: Do not use water to clean the engine. Water could contaminate the fuel system. Use a brush or dry cloth to clean the engine.

This is an air cooled engine. Dirt or debris can restrict air flow and cause the engine to overheat, resulting in poor performance and reduced engine life.

Use a brush or dry cloth to remove debris from the finger guard/rotating screen (A). Keep linkage, springs and controls (B) clean. Keep the area around and behind the muffler free of any combustible debris (Figure 11). Make sure the oil cooler fins ( C)are free of dirt and debris.

Storage

Specifications

Engine Specifications

Model 400000 Displacement 40.03 ci (656 cc) Bore 2.970 in (75.43 mm) Stroke 2.890 in (73.41 mm) Oil Capacity 62 -- 64 oz (1.8 -- 1.9 L)

Engine Specifications

Model 440000 Displacement 44.18 ci (724 cc) Bore 3.120 in (79.24 mm) Stroke 2.890 in (73.41 mm) Oil Capacity 62 -- 64 oz (1.8 -- 1.9 L)

Engine Specifications

Model 490000 Displacement 49.42 ci (810 cc) Bore 3.300 in (83.81 mm) Stroke 2.890 in (73.41 mm) Oil Capacity 66 -- 68 oz (1.9 -- 2.0 L)

Tune-up Specifications *

Model 400000, 440000, 490000 Spark Plug Gap 0.030 in (0.76 mm) Spark Plug Torque 180 lb-in (20 Nm) Armature Air Gap 0.008 - 0.012 in (0.20 - 0.30 mm) Intake Valve Clearance 0.004 - 0.006 in (0.10 - 0.15 mm) Exhaust Valve Clearance 0.004 - 0.006 in (0.10 - 0.15 mm)

* Engine power will decrease 3.5% for each 1,000 feet (300 meters) above sea level and 1% for each 10 F(5.6 C) above 77 F(25 C). The engine will operate satisfactorily at an angle up to 15. Refer to the equipment operator’s manual for safe allowable operating limits on slopes.

WARNING

Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death.

When Storing Fuel Or Equipment With Fuel In Tank

 Store away from furnaces, stoves, water heaters or other appliances that have

pilot lights or other ignition sources because they can ignite fuel vapors.

Fuel System

Fuel can become stale when stored over 30 days. Stale fuel causes acid and gum deposits to form in the fuel system or on essential carburetor parts. To keep fuel fresh, use Briggs & Stratton Advanced Formula Fuel Treatment & Stabilizer, available wherever Briggs & Stratton genuine service parts are sold.

For engines equipped with a FRESH START

available in a drip concentrate cartridge.

START

There is no need to drain gasoline from the engine if a fuel stabilizer is added according to instructions. Run the engine for 2 minutes to circulate the stabilizer throughout the fuel system before storage.

If gasoline in the engine has not been treated with a f uel stabilizer, it must be drained into an approved container. Run the engine until it stops from lack of fuel. The use of a fuel stabilizer in the storage container is recommended to maintain freshness.

Engine Oil

While the engine is still warm, change the engine oil. See the How To Change The Oil section.

fuel cap, use Briggs & Stratton FRESH

Common Service Parts n

Service Part Part Number

Air Filter, Flat 499486 Air Filter Pre-cleaner, Flat 273638 Air Filter, Oval 792105 Air Filter Pre-cleaner, Oval 792303 Oil -- SAE 30 100028 Oil Filter, Standard -- Black 492932 Oil Filter, High Efficiency -- Yellow 795890 Oil Filter, High Efficiency -- Orange 798576 Fuel Filter 691035 Fuel Additive 5041, 5058 Resistor Spark Plug 491055 Long Life Platinum Spark Plug 5066 Spark Plug Wrench 19374 Spark Tester 19368

n We recommend that you see any Briggs & Stratton Authorized Dealer for all maintenance and service of the engine and engine parts.

+ 19 hidden pages

Briggs & Stratton NXT2242, NXT2346, NXT2652, 400000 Professional Series, 440000 Intek Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual