Spark Plug(S); Valve Clearance Adjustment; Check Valve Clearance - Generac Power Systems G0065510 Owner's Manual

Spark Plug(s)

Proceed as follows to inspect spark plug gap(s) and
replace spark plug(s) as necessary:
1. With the generator OFF and the engine cool, lift the
lid and remove the front panel.
2. Clean the area around the base of the spark
plug(s) to keep dirt and debris out of the engine.
3. Remove spark plug(s) and inspect the condition.
Install new plug(s) if existing plug(s) is worn or if
reuse is questionable.
4. Clean plug(s) by scraping or washing with a wire
brush and commercial solvent. Do not blast plug(s)
to clean.
NOTE: Clean spark plug in emergency situations only.
Otherwise, replace spark plug.
5. Inspect spark plug gap using a wire feeler gauge.
See Figure 4-5. Replace spark plug if gap is out of
specification. See General
NOTE: New spark plugs should have the gap checked
prior to installation.
6. Install the spark plug(s), and torque to 18.4 ft-lbs
(25 Nm).
7. Press the control panel AUTO button to return the
unit to AUTO mode.
Figure 4-5. Spark Plug Gap Measurement
Owner's Manual for 60 Hz Air-Cooled Generators
Information.
000211

Valve Clearance Adjustment

IMPORTANT NOTE: Contact an IASD for service
assistance. Proper valve clearance is essential for
prolonging the life of the engine.
Check valve clearance after the first 25 hours of
operation, then after 400 hour intervals. Adjust if
necessary.

Check Valve Clearance

NOTE: The engine should be cool before checking valve
clearance. Adjustment is not needed if valve clearance is
within the dimensions provided in Engine.
1. Close fuel valve and disconnect battery to avoid
accidental start-up.
2. Remove spark plug wire(s), and position wire(s)
away from plug(s).
3. Remove spark plug(s).
4. Remove the four screws attaching the valve cover.
Remove and discard the gasket. (Repeat for
second cylinder, if equipped.)
5. Verify piston is at top dead center (TDC) of its
compression stroke (both valves closed). To move
the piston to TDC, remove the intake baffle at the
front of the engine to access the flywheel nut. Use
a large socket and socket wrench to rotate the
flywheel nut clockwise, which will rotate the
crankshaft. Watch the piston through the spark
plug hole. The piston should move up and down.
The piston is at TDC when it is at its highest point
of travel.
6. See Figure 4-6 or
clearance between each rocker arm (E) and valve
stem (F) with a feeler gauge.
.
E
Figure 4-6. Valve Clearance Adjustment (9 kW)
Maintenance
Figure 4-7. Check the valve
001812
F
D
C
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