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Service Spark Plug
See Figure: 11
Check the gap (A, Figure 11) 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.
Service Exhaust 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.
•
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.
Remove accumulated debris from muffler and cylinder area. Inspect the muffler for cracks,
corrosion, or other damage. Remove the deflector or 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.
Change Engine Oil
See Figure: 12, 13, 14
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(s) (D, Figure 12) and
keep it away from the spark plug(s) (E).
2.
Remove the dipstick (A, Figure 13).
3.
Remove the oil drain plug (F, Figure 14). Drain the oil into an approved container.
4.
After the oil has drained, install and tighten the oil drain plug (F, Figure 14).
Change Oil Filter, if equipped
Some models are equipped with an oil filter. For replacement intervals, see the
Maintenance Schedule.
1.
Drain the oil from the engine. See Remove Oil section.
2.
Remove the oil filter (G, Figure 14) and dispose of properly.
3.
Before you install the new oil filter, lightly lubricate the oil filter gasket wil fresh, clean
oil.
4.
Install the oil filter by hand until the gasket contacts the oil filter adapter, then tighten
the oil filter 1/2 to 3/4 turns.
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 the oil level. Correct oil level is at the top of the full indicator
(B, Figure 13) on the dipstick.
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 13) and wipe with a clean cloth.
2.
Slowly pour oil into the engine oil fill (C, Figure 13). Do not overfill. After adding oil,
wait one minute and then check the oil level.
3.
Install and tighten the dipstick (A, Figure 13).
4.
Remove the dipstick and check the oil level. Correct oil level is at the top of the full
indicator (B, Figure 13) on the dipstick.
5.
Reinstall and tighten the dipstick (A, Figure 13).
6.
Connect the spark plug wire(s) (D, Figure 12) to the spark plug(s) (E).
Service Air Filter
See Figure: 15, 16
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.
1.
Models without Fuel Tank: Open the fastener(s) (A, Figure 15) and remove the
cover (B).
2.
Models with Fuel Tank: Remove the fastener(s) (C, Figure 16) and the cover (B).
3.
Remove the nut (D, Figure 15, 16) and retainer (E).
4.
Remove the air filter (F, Figure 15, 16).
5.
Remove the pre-cleaner (G, Figure 15, 16), if equipped, from the air filter (F).
6.
To loosen debris, gently tap the air filter (F, Figure 15, 16) on a hard surface. If the
air filter is excessively dirty, replace with a new air filter.
7.
Wash the pre-cleaner (G, Figure 15, 16) in liquid detergent and water. Allow the
pre-cleaner to air dry. Do not oil the pre-cleaner.
8.
Assemble the dry pre-cleaner (G, Figure 15, 16), if equipped, to the air filter (F).
9.
Install the air filter (F, Figure 15, 16) and secure with retainer (E) and nut (D).
10.
Install and secure the cover (B, Figure 15, 16).
Service Fuel System
See Figure: 17, 18
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 17), 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 17) 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.
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