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MAINTENANCE
CHANGING THE OIL
Change the oil while the engine is still warm. The oil will
flow freely and carry away more impurities.
1. Clean the area around the oil fill plug (Fig. 9) to
prevent debris from entering the oil fill hole.
2. Unscrew the oil fill plug.
3. Tip the unit vertically to pour the oil out of the oil fill
hole and into a container (Fig. 11). Allow ample time
for complete drainage.
Note: Dispose of the old oil according to federal, state
and local regulations.
4. Wipe up any oil that may have spilled.
5. Pour 2.03 fl.oz. (60 ml) of SAE 30 oil into the oil fill
hole.
Note: DO NOT overfill. Refer to Checking the Oil Level.
6. Wipe up any oil that may have spilled.
7. Reinstall the oil fill plug.
Note: Make sure the O-ring is in place on the oil fill
plug(Fig. 9).
MAINTAINING THE AIR FILTER
Failure to maintain the air filter can result in poor
performance or can cause permanent damage to
the engine. Engine failure due to improper air filter
maintenance is not covered by the product warranty.
Cleaning the Air Filter
1. Open the air filter cover: press in the lock tab and
swing the air filter cover to the right (Fig. 12).
2. Remove the air filter (Fig. 12).
3. Wash the air filter in detergent and water. Rinse the
air filter thoroughly and allow it to dry.
4. Lightly coat the air filter with clean SAE 30 oil.
5. Squeeze the air filter to spread and remove excess
oil.
6. Reinstall the air filter (Fig. 12).
Note: Operating the unit without the air filter and air
filtercover will VOID the warranty.
7. Close the air filter cover: insert the tabs on the air
filter cover into the slots on the backplate. Swing the
air filter cover to the left and press it closed until the
lock tab snaps into place
12
Fig. 11
Lock Tab
Backplate
Air Filter
ADJUSTING THE IDLE SPEED
If the engine will not idle properly:
1. Start the engine. Refer to Starting and Stopping.
2. Let the engine idle. If the engine stops, increase the
idle speed. Use a small Phillips screwdriver to turn
the idle speed screw clockwise, 1/8 of a turn at a
time, until the engine idles smoothly (Fig. 13).
MAINTAINING THE SPARK PLUG
If the engine will not idle properly:
1. Stop the engine and allow it to cool.
2. Grasp the spark plug boot firmly and pull it from the
spark plug (Fig. 14).
3. Clean around the spark plug. Remove the spark plug
from the cylinder head with a 5/8-inch socket, turning
counterclockwise.
WARNING
Do not sand blast, scrape or clean spark plug
electrodes. Grit in the engine could damage the
cylinder.
4. Inspect the spark plug. If the spark plug is
cracked,fouled or dirty, replace it with replacement
part Newstar AM5C, or a NGK CMR5H, or an
equivalent spark plug.
Air Filter Cover
Tabs/Slots
Fig. 12
Idle Speed Screw
Fig. 13
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