User Manual

GENERATOR PREPARATION

Using the Generator for the First Time

The following section describes steps necessary to prepare the generator for use. If after

reading this section, you are unsure about how to perform any of the steps please call (800)

232-1195 M-F 8-5 CST

for customer service. Failure to perform these steps properly can

damage the generator or shorten its life.

WEN 4050 generator was completely assembled at the factory. If anything is damaged, contact

WEN customer service at 1 800 232 1195 M-F 8-5 CST.

Step 1 - Fill Oil

The generator is shipped without oil. User must add

the proper amount of oil before operating the

generator for the first time. The oil capacity of the

engine crankcase is 20 fluid oz.

Select good quality detergent oil bearing the

American Petroleum Institute (API) service

classifications SJ, SL, or SM. (Synthetic oils may be

used.) Use the SAE viscosity grade of oil from the

following chart that matches the starting temperature

anticipated before the next oil changes.

To fill oil to the crankcase, 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 1.

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 2).

4. Check for oil leaks. Reinstall oil filler cap before starting engine.

Figure 1- Unscrewing the oil cap Figure 2- filling oil