Westinghouse WGen9500, User Manual

20 | Westinghouse Outdoor Power Equipment, LLC

MAINTENANCE

6. 

Dip the foam air filter in clean engine oil then squeeze 

out all excess oil. The engine will smoke when started if 

too much oil is left in the filter. 

7. 

Install the foam air filter in the housing, then the coarse 

air filter. Install the air cleaner cover and secure with the 

cover clips. 

ENGINE OIL LEVEL CHECK

Avoid skin contact with engine oil. Wear protective 

clothing and equipment. Wash all exposed skin with 

soap and water.

NOTICE

Always use the specified engine oil. Failure to use the 

specified engine oil can cause accelerated wear and/or 

shorten the life of the engine. 

When using the generator under extreme, dirty, dusty 

conditions or in extremely hot weather, change the oil 

more frequently. 
Ambient air temperature will affect engine oil performance. 

Change the type of engine oil used based on weather 

conditions.

Check the engine oil level before each use or every 8 

hours of operation.

1. 

Place the generator on a level surface and allow the 

engine to cool for several minutes.

2. 

With a damp rag, clean around the oil dipstick.

3. 

Remove the oil dipstick and wipe the dipstick clean. 

4. 

Insert the dipstick into the oil filler neck without screwing 

it in. Remove the dipstick and verify that the oil level 

is within safe operating range between the low (L) and 

high (H) marks on the dipstick. 

5. 

If low, add recommended engine oil incrementally and 

recheck until the level is between the L and H marks on 

the dipstick. DO NOT overfill. If over the full mark on 

the dipstick, drain the oil to reduce the oil level to the 

full mark.

6. 

Replace the oil dipstick and hand-tighten.

ENGINE OIL CHANGE

When using the generator under extreme, dirty, dusty 

conditions or in extremely hot weather, change the oil 

more frequently. Change the oil while the engine is still 

warm from operation. 

1. 

Place the generator on a level surface and allow the 

engine to cool for several minutes.

2. 

With a damp rag, clean around the oil dipstick. Remove 

the dipstick and wipe clean. 

3. 

Place an oil pan (or suitable container) under the oil 

drain bolt.

4. 

Using a 10mm wrench, remove the oil drain bolt and 

allow the oil the to drain. 

5. 

Install the oil drain bolt and tighten securely. 

Note: 

A new oil drain plug crush washer is recommended 

at each oil change.

6. 

Slowly pour oil into the oil filler neck until oil the level 

is between the L and H marks on the dipstick. Stop 

frequently to check the oil level. DO NOT overfill. 

Maximum oil capacity:

 1.16 Quart (1.1 Liter)