Replacement Part List

GEN4000DF-STW 4000 Surge Watt / 3500 Running Watt Portable Dual Fuel Generator + Welder

Spark Plug Maintenance

The spark plug is essential for proper engine operation. The spark plug should be intact, free of deposits, and properly gapped. A bad or incorrectly

installed spark plug can cause engine damage. To inspect the spark plug:

1. Remove the spark plug by pulling on the spark plug cap.

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

3. Visually inspect the spark plug. If it is cracked and/or chipped, discard and install a new spark plug. A F7RTC spark plug, such as

NGK BPR7ES is recommended.

4. Measure the spark plug electrode gap with a gauge. The gap should be 0.020-0.028 inch. (Figure17.)

5. If 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 place on this generator by using the included spark plug wrench.

7. Replace the spark plug cap.

Figure 16 - Locating the Spark Plug Figure 17 – Spark Plug Gap

Spark Arrester

1. Allow the engine to cool completely before servicing the spark arrester.

2. Remove the screws holding the cover plate which retains the end of the spark arrester to the muffler.

3. Remove the spark arrester screen.

4. Carefully remove the carbon deposits from the spark arrester screen with a wire brush.

5. Replace the spark arrester if it is damaged.

6. Position the spark arrester in the muffler and attach with the screws.

Changing Fuel Line

Fuel line installation instruction ( include the carburetor and fuel tank, etc.)

1. Connect clamp (Ф7.5) to the fuel hose.

2. Slide fuel hose onto connection until it touches the bottom.

3. Then secure with clamp.