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Briggs & Stratton 400000 Manuel D'utilisation page 20

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• 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.
1.
Use a brush or dry cloth to remove debris from the air intake grille.
2.
Keep linkage, springs and controls clean.
3.
Keep the area around and behind the muffler, if equipped, free of any combustible
debris.
4.
Make sure the oil cooler fins, if equipped, are free of dirt and debris.
After a period of time, debris can accumulate in the cylinder cooling fins and cause the
engine to overheat. This debris cannot be removed without partial disassembly of the
engine. Have a Briggs & Stratton Authorized Service Dealer inspect and clean the air
cooling system as recommended in the Maintenance Schedule.
Storage
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
See Figure: 15 
Store the engine level (normal operating position). Fill fuel tank (A, Figure 15) with fuel.
To allow for expansion of fuel, do not overfill above the fuel tank neck (B). 
Fuel can become stale when kept in a storage container for more than 30 days. Each
time you fill the container with fuel, add fuel stabilizer to the fuel as specified by the
manufacturer's instructions. This keeps fuel fresh and decreases fuel-related problems
or contamination in the fuel system.
It is not necessary to drain fuel from the engine when fuel stabilizer is added as
instructed. Before storage, turn the engine ON for 2 minutes to move the fuel and
stabilizer through the fuel system.
If gasoline in the engine has not been treated with a fuel 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 Change Engine Oil
section.
Troubleshooting
For assistance, contact your local dealer or go to BRIGGSandSTRATTON.com or call
1-800-233-3723 (in USA).
Specifications
Model: 400000 
Displacement 
Bore 
Stroke 
Oil Capacity 
Spark Plug Gap 
Spark Plug Torque 
Armature Air Gap 
Intake Valve Clearance 
Exhaust Valve Clearance 
Model: 440000 
Displacement 
20
 40.03 ci (656 cc) 
 2.970 in (75,43 mm) 
 2.890 in (73,41 mm) 
 62 - 64 oz (1,8 - 1,9 L) 
 .030 in (,76 mm) 
 180 lb-in (20 Nm) 
 .008 - .012 in (,20 - ,30 mm) 
 .004 - .006 in (,10 - ,15 mm) 
 .004 - .006 in (,10 - ,15 mm) 
 44.18 ci (724 cc) 
Model: 440000 
Bore 
Stroke 
Oil Capacity 
Spark Plug Gap 
Spark Plug Torque 
Armature Air Gap 
Intake Valve Clearance 
Exhaust Valve Clearance 
Model: 490000 
Displacement 
Bore 
Stroke 
Oil Capacity 
Spark Plug Gap 
Spark Plug Torque 
Armature Air Gap 
Intake Valve Clearance 
Exhaust Valve Clearance 
 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. 
Service Parts - Model: 400000, 440000, 490000 
 Service Part 
Air Filter, Paper (Figure 11) 
Air Filter Pre-cleaner (Figure 11) 
Air Filter, Paper (Figure 13) 
Air Filter Pre-cleaner (If equipped) (Figure 13) 
Air Filter, Paper (Figure 12) 
Air Filter Pre-cleaner (Figure 12) 
Oil - SAE 30 
Oil Filter, Standard - Black 
Oil Filter, High Efficiency - Yellow 
Oil Filter, High Efficiency - Orange 
Fuel Filter 
Resistor Spark Plug 
Long Life Platinum Spark Plug 
Spark Plug Wrench 
Spark Tester 
 We recommend that you see any Briggs & Stratton Authorized Dealer for all
maintenance and service of the engine and engine parts. 
 Power Ratings: The gross power rating for individual gasoline engine models is
labeled in accordance with SAE (Society of Automotive Engineers) code J1940 Small
Engine Power & Torque Rating Procedure, and is rated in accordance with SAE J1995.
Torque values are derived at 2600 RPM for those engines with "rpm" called out on the
label and 3060 RPM for all others; 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 gasoline 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 engine. 
 3.120 in (79,24 mm) 
 2.890 in (73,41 mm) 
 62 - 64 oz (1,8 - 1,9 L) 
 .030 in (,76 mm) 
 180 lb-in (20 Nm) 
 .008 - .012 in (,20 - ,30 mm) 
 .004 - .006 in (,10 - ,15 mm) 
 .004 - .006 in (,10 - ,15 mm) 
 49.42 ci (810 cc) 
 3.300 in (83,81 mm) 
 2.890 in (73,41 mm) 
 66 - 68 oz (1,9 - 2,0 L) 
 .030 in (,76 mm) 
 180 lb-in (20 Nm) 
 .008 - .012 in (,20 - ,30 mm) 
 .004 - .006 in (,10 - ,15 mm) 
 .004 - .006 in (,10 - ,15 mm) 
 Part Number 
 499486 
 273638 
 591334 
 797704 
 792105 
 792303 
 100028 
 492932 
 795890 
 798576 
 691035 
 491055 
 5066 
 19374 
 19368 
BRIGGSandSTRATTON.com

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440000490000