Engine Maintenance; Adjust Valve Lash - Briggs & Stratton 040517 Manual Del Operador

Engine Maintenance

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. Gain access to valves by removing the two
fasteners that secure the valve cover.
2. Remove spark plugs to ease manual rotation of
engine crankshaft.
3. Turn crankshaft counterclockwise until the piston is
at Top Dead Center on the compression stroke.
4. 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".
5. For the Model 38 Engine:
• Use a feeler gauge
clearance.
• Adjust the clearance by loosening the lock nut
B
then turn the adjusting screw
the following measurements:
Intake: 0.005 in. (0.13 mm)
Exhaust: 0.008 in. (0.20 mm)
• Once the clearance is properly set, hold the
adjusting screw while torquing the lock nut to
70 in/lbs. (8 Nm).
6. Reassemble valve cover by carefully aligning cover
and fastener holes. Tighten valve cover fasteners to
35 in/lbs (3.9 Nm).
7. Repeat for the other valve.
A
to measure the valve
C
to obtain
When all engine servicing is complete, replace 15 Amp
fuse in control board and reset exercise timer.
A
Model 38 Engine
B
C
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