Westinghouse WGen7500, User Manual

Westinghouse Portable Power | 27

6.  If an adjustment is required, hold the adjusting nut and 

loosen the jam nut.

7. 

Turn the adjusting nut to obtain the correct valve lash. 
When the valve lash is correct, hold the adjusting nut 
and tighten the jam nut to 106 in-lb (12 N•m).

8.  Recheck the valve lash after tightening the jam nut.

9. 

Perform this procedure for both the intake and 
exhaust valves.

10. 

Install the rocker arm cover, gasket and spark plug.

TESTING GFCI OUTLETS

1.  Start the generator and allow it to warm up.

2. 

Press the test button on the GFCI outlet.

Test Button

Reset Button

3.  The reset button should pop out and there will be 

no power from the outlets. If the reset button does 
not pop out, the GFCI outlet is not working correctly 

and must be repaired before the generator can be 
operated.

4.  Press the reset button to restore power to the outlet.

BATTERY SERVICE

WARNING

Do not charge for over 8 hours. Leaving the 
charger plugged in indefinitely could overcharge 
the battery and lead to battery failure.

To ensure the battery remains charged, the generator 
should be started every 2 to 3 months and run for a 

minimum of 15 minutes or a charger should be plugged 
into the generator and the generator should be charged 

overnight. Make sure the engine control switch is in the 

STOP

 position when charging. Plug the cord from the 

charger into the charging port on the generator control 

panel. Plug the charger into a 110/120-volt AC outlet. 

CHECKING AND ADJUSTING VALVE LASH

CAUTION

Checking and adjusting valve lash

must be done when the engine is cold.

1. 

Remove the rocker arm cover and carefully remove 
the gasket. If the gasket is torn or damaged, it must 

be replaced.

2. 

Remove the spark plug so the engine can be rotated 
more easily.

3. 

Rotate the engine to top dead center (TDC) of the 
compression stroke. Looking through the spark plug 

hole, the piston should be at the top.

4. 

Both the rocker arms should be loose at TDC on the 
compression stroke. If they are not, rotate the engine 
360°.

5. 

Insert a feeler gauge between the rocker arm and the 
push rod and check for clearance (see Figure 24). See 
Table 3 for valve lash specifications.

1

2

3

4

5

Figure 24

(1) Push Rod, (2) Feeler Gauge Area 

(3) Rocker Arm,  (4) Jam Nut, (5) Adjusting Nut

(Table 3) Standard Valve Lash

Intake Valve

Exhaust Valve

Valve Lash

0.0035 ± 0.0043 in 

(0.09 ± 0.11 mm)

0.0043 ± 0.0051 in 

(0.11 ± 0.13 mm)

Bolt Torque

8-12N.m

8-12N.m

MAINTENANCE