9
en
How To Clean The Air Cooling System - Figure
11
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.
WARNING
• 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
WARNING
Gasoline and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
When Storing Gasoline Or Equipment With Fuel In Tank
• Store away f rom furnaces, stoves, water heaters or other appliances that have
pilot light or other ignition source because they can ignite gasoline 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 FRESH START
®
fuel stabilizer, available as a liquid additive or a
drip concentrate cartridge.
There is no need to drain gasoline from the engine if a fuel stabilizer is added according
to instructions. Run the engine for2 minutes to circulate the stabilizer throughout the fuel
system. The engine and fuel can then be stored up to 24 months.
If gasoline in the engine has notbeen 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 How To Change The Oil
section.
Troubleshooting
Need Assistance? Go to BRI GGSandSTRATTON.COM or call 1-800-233-3723.
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 leveland
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.
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 492932
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. Use only genuine Briggs &
Stratton parts.
