Service Air Filter - Briggs & Stratton 90000 Operator's Manual

Add Oil
• Make sure the engine is level.
• Clean the oil fill area of any debris.
See the Specifications section for oil capacity.
•
1. Remove the dipstick (A, Figure 12) and wipe with a clean cloth.
2. Slowly pour oil slowly into the engine oil fill (C, Figure 12). Do not overfill. After
adding oil, wait one minute and then check the oil level.
3. Install and tighten the dipstick (A, Figure 12).
4. Remove the dipstick and check the oil level. Correct oil level is at the top of the full
indicator (B, Figure 12) on the dipstick.
5. Reinstall and tighten the dipstick (A, Figure 12).
6. Connect the spark plug wire (D, Figure 9) to the spark plug (E).

Service Air Filter

See Figure: 13, 14
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
• Never start and 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.
See the Maintenance Schedule for service requirements.
Various models use either a foam or a paper filter. Some models may also have an optional
pre-cleaner that can be washed and reused. Compare the illustrations in this manual with
the type installed on your engine and service as follows.
1. Loosen the fastener(s) (A, Figure 13, 14).
2. Remove the cover (B, Figure 13, 14).
3. Remove the fastener(s) (E, Figure 14), if equipped.
4. To prevent debris from falling into the carburetor, carefully remove the pre-cleaner
(D, Figure 13, 14) and the filter (C) from the air filter base.
5. To loosen debris, gently tap the filter (C, Figure 13, 14) on a hard surface. If the filter
is excessively dirty, replace with a new filter.
6. Remove the pre-cleaner (D, Figure 13, 14) from the filter (C).
7. Wash the pre-cleaner (D, Figure 13, 14) in liquid detergent and water. Allow the pre-
cleaner to throughly air dry. Do not oil the pre-cleaner.
8. Assemble the dry pre-cleaner (D, Figure 13, 14) to the filter (C).
9. Install the filter (C, Figure 13, 14) and the pre-cleaner (D). Make sure the filter fits
securely on the air filter base.
10. Make sure the gasket (F, Figure 14), if equipped, is in correct position under the filter
(C). Secure filter (C) with fastener(s) (E), if equipped.
11. Install the cover (B, Figure 13, 14) and secure with the fastener(s) (A). Make sure
the fastener(s) is tight.
Service Fuel System
See Figure: 15
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
• 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 cleaning or replacing the fuel filter, drain the fuel tank or close the fuel shut-
off valve.
• If fuel spills, wait until it evaporates before starting engine.
• Replacement parts must be the same and installed in the same position as the original
parts.
Fuel Filter, if equipped
1. Before cleaning or replacing the fuel filter (A, Figure 15), 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, Figure 15) on the clamps (C), then slide the clamps
away from the fuel filter (A). Twist and pull the fuel lines (D) off of the fuel filter.
3. Check the fuel lines (D, Figure 15) for cracks or leaks. Replace if necessary.
4. Replace the fuel filter (A, Figure 15) with an original equipment replacement filter.
5. Secure the fuel lines (D, Figure 15) with clamps (C) as shown.
Service Cooling System
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.
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: 16
Store the engine level (normal operating position). Fill fuel tank (A, Figure 16) with fuel.
To allow for expansion of fuel, do not overfill above the fuel tank neck (B).
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.
There is no need to drain gasoline from the engine if a fuel stabilizer is added according
to instructions. Run the engine for two (2) minutes to circulate the stabilizer throughout the
fuel system before storage.
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.
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