Westinghouse WGen9500, User Manual

Westinghouse Outdoor Power Equipment, LLC | 19

MAINTENANCE

Accidental start-up. Disconnect the spark plug boot from 

the spark plug and disconnect the battery quick-connect 

plugs when performing maintenance on the generator. 

MAINTENANCE SCHEDULE

Regular maintenance will improve performance and 

extend the service life of the generator. Follow the hourly 

or calendar intervals, whichever occurs first. More frequent 

service is required when operating in adverse conditions 

as noted below. 

Before Each Use

Check engine oil

After First 25 Hours or First Month

Change engine oil

After 50 Hours or Every 6 Months

Change engine oil

1

Clean air filter

2

After 100 Hours or Every 6 Months

Inspect/clean spark arrestor 

Inspect/clean spark plug 

Inspect/adjust valve clearance

3

After 300 Hours or Every Year

Replace spark plug 

Replace air filter

1

Change oil every month when operating under heavy 

load or in high temperatures. 

2

Clean more often under dirty or dusty conditions. 

Replace air filter if it cannot be adequately cleaned.

3

Recommend service to be performed by authorized 

Westinghouse service dealer.

MAINTENANCE REPLACEMENT PARTS

Description

Part Number

Air filter

5692

Oil drain plug crush washer

94004

Spark arrestor

6866

Battery, 14 AH

511012

Spark plug

97108

AIR FILTER MAINTENANCE

Fire  hazard.  Never  use  gasoline  or  other  flammable 

solvents  to  clean  the  air  filter.  Use  only  household 

detergent soap to clean the air filter.

The air filter must be cleaned after every 50 hours of use or 

six months (frequency should be increased if the generator  

is operated in a dusty environment).

1. 

Place the generator on a level surface and allow the 

engine to cool for several minutes.

2. 

Release the top and bottom clips then remove the air 

filter cover. 

3. 

Remove the air filters. Use compressed air to clean the 

coarse air filter. 

Note: 

The  foam  air  filter  element  is  oil  soaked.  Use  an 

appropriate cleaning container. 

NOTICE

Avoid skin contact with engine oil. Wear protective 

clothing and equipment. Wash all exposed skin with 

soap and water.

4. 

Remove the foam air filter and wash it by submerging 

the element in a solution of household detergent soap 

and warm water. Slowly squeeze the foam to thoroughly 

clean.

NOTICE

DO NOT twist or tear the foam air filter element during 

cleaning or drying. Only apply slow but firm squeezing 

action.

5. 

Rinse  the  air  filter  element  by  submerging  it  in  fresh 

water and applying a slow squeezing action. Allow the 

filter to dry thoroughly.

NOTICE

Do not pollute. Follow the guidelines of the EPA or other 

governmental agencies for proper disposal of hazardous 

materials. Consult local authorities or reclamation facility.