1.Turn the access door knob left 1/4 turn, open the access door. Then remove the two side covers
and the rear cover.
2. Unsnap the clips, remove the air cleaner cover.
3. Remove the sponge element from the air cleaner cover.
Wash the sponge element in a solution of household detergent and warm water, then rinse
thoroughly, or wash in nonflammable or high flash point solvent. Allow the sponge element to
dry thoroughly. Soak the sponge element in clean engine oil and squeeze out the excess oil.
The engine will smoke during initial startup if too much oil is left in the sponge element.
Reinstall the sponge element to the air cleaner cover.
4. Reinstall the air cleaner cover.
5. Reinstall the rear cover, two side covers and the access door in order.
7.4 Spark plug service
Recommended spark plug: WR7DC
To ensure proper engine operation, the spark plug must be properly gapped and free of deposits.
1. Open the access door.
2. Remove the spark plug cap.
3. Use the wrench to remove the spark plug.
4. Clean any dirt from around the spark plug base.
Fig.16
Fig.17
Sponge element
Air cleaner cover
Spark plug wrench
Air cleaner base
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5. Visually inspect the spark plug.Discard it if the insulator is cracked or chipped.Clean the spark
plug with a wire brush if it is to be reused.
6. Measure the plug gap with a feeler gauge.
The gap should be 0.02-0.03in. Correct as necessary by carefully bending the side electrode.
Fig.18
7. Install the spark plug carefully by hand to avoid cross-threading.
8. After a new spark plug has been seated by hand,it should be tightened 1/2 turn with a wrench
to compress its washer. If a used plug is being reinstalled, it should only required 1/8 to 1/4 turn
after being seated.
9. Reinstall the spark plug inspection cover and tighten the cover screw.
10. Close the access door.
Plug gap
The spark plug must be securely tightened. An improperly tightened spark plug can become
very hot and possibly damage the generator.
Never use a spark plug with an improper heat range.
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7.5 Spark arrester maintenance
If the generator has been running, the muffler will be very hot. Allow it to cool
before proceeding.
Fig.19
The spark arrester must be serviced every 500 hours to maintain its efficiency.
1. Turn the access door knob left 1/4 turn, open the access door. Remove the
two side covers and the rear cover.
2. Remove the spark arrester.
3. Use a brush to remove carbon deposits from the spark arrester screen.
Inspect the spark arrester screen for holes or tears. Replace if necessary.
4. Reinstall the spark arrester.
5. Reinstall the rear cover, two side covers and the access door in order.
Spark arrester
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8.TRANSPORTING/STORAGE
8.1 When transporting the generator, turn the fuel valve lever OFF and keep the generator level
to prevent fuel spillage.
8.2 Before storing the unit for an extended period:
1. Be sure the storage area is free of excessive humidity and dust.
2. Drain the fuel----
a. Open the access door.
b. Turn fuel valve to ON and then loosen the carburetor drain screw. Drain the gasoline from the
carburetor and fuel tank into a suitable container.
c. Tighten the carburetor screw, close the fuel valve lever and access door.
3. Change the engine oil.
4. Remove the spark plug and pour about a tablespoon of clean engine oil into the cylinder.
Crank the engine several revolutions to distribute the oil, then reinstall the spark plug.
5. Slowly pull the starter grip until resistance is felt. At this point, the piston is coming up on its
compression stroke and both the intake and exhaust valves are closed.
Storing the engine in this position will help to protect it from internal corrosion.
Fig.20
Drain plug
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