Inspect Muffler And Spark Arrester - Figure 8
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.
•Install and maintain in working order a spark arrester before using equipment on
Inspect the muffler (A, Figure 8) for cracks, corrosion, or other damage. Remove the muffler deflector (B), if equipped, and inspect for damage or carbon blockage. If replacement parts are required, make sure to use only original equipment replacement parts.
WARNING: Replacement parts must be the same and installed in the same position as the original parts or fire could result.
Air Filter
This engine is not equipped with an air filter. DO NOT use this engine for anything other than snow removal.
How To Change The Oil - Figure 2 3 9
CAUTION: 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.
Remove Oil
1.With engine off but still warm, disconnect the spark plug wire (A, Figure 9) and keep it away from the spark plug.
2.Remove the oil drain plug (E, Figure 2). Drain the oil into an approved receptacle. Note: Any of the oil drain plugs (F) shown may be installed in the engine.
3.After the oil has drained, install and tighten the oil drain plug.
Add oil
•Place engine level.
•Clean the oil fill area of any debris.
•See the Specifications section for oil capacity.
Models with oil fill cap
1.Remove the oil fill cap (A, Figure 2).
2.Pour the oil slowly into the engine oil fill (B). Fill to point of overflowing.
3.Replace and tighten the oil fill cap.
Models with extended dipstick
1.Remove the dipstick (C, Figure 3) and wipe with a clean cloth.
2.Pour the oil slowly into the engine oil fill (B). Do not overfill. After adding oil, wait one minute and then recheck the oil level.
3.Install and tighten the dipstick.
4.Remove the dipstick and check the oil level. Oil level should be at the FULL mark (D) on the dipstick.
5.Install and tighten the dipstick.
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 from furnaces, stoves, water heaters or other appliances that have pilot lights or other ignition sources 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 for 2 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 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.
Troubleshooting
Need Assistance? Go to BRIGGSandSTRATTON.COM or call
Specifications
Engine Specifications
Model | 90000 |
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Displacement | 9.02 ci (148 cc) |
Bore | 2.562 in (65.08 mm) |
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Stroke | 1.750 in (44.45 mm) |
Oil Capacity | 18 |
Tune-up Specifications *
Model | 90000 |
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Spark Plug Gap | 0.030 in (0.76 mm) |
Spark Plug Torque | 180 |
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Armature Air Gap | 0.006 - 0.010 in (0.15 - 0.25 mm) |
Intake Valve Clearance | 0.005 - 0.007 in (0.13 - 0.18 mm) |
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Exhaust Valve Clearance | 0.007 - 0.009 in (0.18 - 0.23 mm) |
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*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.
Common Service Parts n
Service Part | Part Number |
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Fuel Additive | 5041, 5058 |
Resistor Spark Plug | 802592 |
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Long Life Platinum Spark Plug | 5062 |
Spark Plug Wrench | 89838, 5023 |
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Spark Tester | 19368 |
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nWe 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.
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