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51
Engine Maintenance
When all engine servicing is complete, replace 15 Amp fuse
in control board and reset exercise timer.
WARNING Unintentional sparking could cause fire or electric
shock resulting in death or serious injury.
WHEN ADJUSTING OR MAKING REPAIRS TO YOUR
GENERATOR
• Disconnect the spark plug wire from the spark plug and place
the wire where it cannot contact spark plug.
WHEN TESTING FOR ENGINE SPARK
• Use approved spark plug tester.
• DO NOT check for spark with spark plug removed.
Adjust Valve Lash
The valve lash must be checked every 100 hours of
operation. Measure valve clearance with the engine cold.
To adjust the valve lash, proceed as follows:
1. Press and hold the control board OFF button.
2. Remove 15 Amp fuse from control board.
3. Remove spark plug(s) to ease manual rotation of
engine crankshaft.
4. Turn crankshaft counterclockwise until the piston is
at Top Dead Center on the compression stroke.
5. Insert a narrow screwdriver or rod into spark plug
hole as a gauge, then slowly turn crankshaft
counterclockwise until the piston has moved down
the bore by 1/4”.
6. For the Model 35 Engine:
• Use a feeler gauge (A) to measure the valve
clearance.
• Adjust the clearance by loosening the lock nut
(B) then turn the adjusting screw (C) to obtain
the following measurement:
Intake: 0.005 in. (0.013 mm)
Exhaust: 0.008 in. (0.020 mm)
• Once the clearance is properly set, hold the
adjusting screw while torquing the lock nut to
70 in/lbs. (8 Nm).
7. Repeat for the other valve, if applicable.
When all servicing is complete, replace 15 Amp fuse in
control board and reset exercise timer.
Model 35 Engine
B
C
A
Not for
Reproduction
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