WEN 56405 Power Pro 4050 Watt - Manual (Page 25)

Figure 14- Checking the oil
Changing/ Adding Oil
Change the oil according to the maintenance schedule in figure 13. Change the oil when the
engine is warm. This will allow for complete drainage. Change oil more often if operating under
heavy load or high ambient temperatures. It is also necessary to drain the oil from the crankcase if
it has become contaminated with water or dirt.
The oil capacity of the engine in this generator is 20 fluid oz
. Add oil when the oil level is low.
Drain the oil from the generator according to the following steps:
1. Place a container underneath the engine to catch oil as it drains.
2. Using a 10 mm hex wrench, unscrew the oil drain plug (see figure 15). Allow all the oil to
drain from the engine.
3. Reinstall the oil drain plug and tighten with a 10 mm hex wrench.
To fill the crankcase with oil, follow these steps:
1. Make sure the generator is on a level surface. Tilting the generator to assist in filling will
cause oil to flow into engine areas and will cause damage. Keep generator level!
2. Remove the oil filler/dipstick cap from the engine as shown in figure 14 above.
3. Using a funnel, add the appropriate type and amount of oil into the crankcase. The
crankcase is full when the oil level has reached the second thread from the lip of the
opening (see figure 16).
4. Check for oil leaks. Reinstall oil filler cap before starting engine.
Figure 15- Draining oil Figure 16- Adding oil
NOTE: Never dispose of used motor oil in the trash or down a drain. Please call your local
recycling center or auto garage to arrange oil disposal.
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