WEN 56405 Power Pro 4050 Watt User Manual

Page 27

Spark Plug Maintenance

The spark plug is important for proper engine operation. A good spark plug should be intact, free

of deposits, and properly gapped. To inspect the spark plug:

1. Pull on the spark plug cap to remove it.

2. Unscrew the spark plug from the generator using the spark plug wrench included with this

product (see figure 19).

3. Visually inspect the spark plug. If it is cracked or chipped, discard and replace with a new

spark plug.

4. Measure the plug gap with a gauge (see figure 20). The gap should be 0.7-0.8mm (0.028-

0.031in).

5. If you are re-using the spark plug, use a wire brush to clean any dirt from around the spark

plug base and then re-gap the spark plug.

6. Screw the spark plug back into its place on the generator using the spark plug wrench. Do

not over-tighten spark plug. Recommended tightening of spark plug is ½ to ¾ of a turn

after spark plug gasket contacts spark plug hole. Reinstall the spark plug cap.

PLUG WRENCH

PLUG CAP

0.7-0.8 mm

(0.028-0.031 in)

Figure 19- Removing the spark plug Figure 20- Measuring the spark plug gap

Spark Plug: NGK BPR6ES

Draining the Fuel Tank

Clean fuel tank each year or before storing the generator for extended periods of time. To drain the

fuel tank and carburetor:

1. Turn the fuel valve to the “OFF” position.

2. Remove the fuel line between the fuel valve and carburetor. Caution: a small amount of

fuel may leak from the hose during removal.

3. Attach a fuel line (not included with the generator) to exposed end of the fuel valve.

4. Position fuel line into an appropriate container and open the fuel valve allowing fuel to

flow into the container.

5. Once fuel is drained, shut off the fuel valve.

6. Start and run the engine until fuel runs out.

7. Remove the fuel filter cup (see “Fuel Filter Cup Cleaning” earlier in this section).

8. Empty the fuel filter cup of any fuel and clean

9. Reinstall the fuel filter cup.

10. Store the emptied gasoline in a suitable place.

CAUTION: Do not store fuel for more than 3 months.

PLUG WRENCH

PLUG CAP