Spark Plug(S); Valve Clearance Adjustment; Checking Valve Clearance - Generac Power Systems 10 kW Owner's Manual

6.
Install a new air filter element.
7.
Install air cleaner cover and fasten cover
clips.
8.
(14–26 kW units only): Verify air inlet
duct (D) is correctly connected to air
cleaner cover.
9.
Press AUTO button on control panel to
return unit to AUTO.

Spark Plug(s)

WARNING
Electric shock. Do not disconnect spark
plug wires with engine running. Doing so
could result in death or serious injury.
Proceed as follows to inspect spark plug
gap(s) and replace spark plug(s):
1.
With generator OFF and engine cool, lift lid
and remove front panel.
2.
Clean area around base of spark plug(s) to
keep dirt and debris out of engine.
NOTE: Clean and re-gap spark plug(s) in
emergency situations only. Otherwise, replace
spark plug(s).
3.
Remove spark plug(s) and inspect spark
plug gap(s) using a wire feeler gauge.
Replace spark plug(s) if spark plug gap is
out of specification. See Engine.
NOTE: See
Figure
should have spark plug gap checked prior to
installation.
Figure 4-6. Spark Plug Gap Measurement
4.
Install spark plug(s), and tighten to 18.4 ft-
lbs (25 Nm).
5.
Press AUTO button to return unit to AUTO
mode.
Owner's Manual for 60 Hz Air-Cooled Generators
(000140a)
4-6. New spark plug(s)
000211

Valve Clearance Adjustment

IMPORTANT NOTE: Contact an IASD for
service assistance. Correct valve clear-
ance is essential for prolonging the life of
the engine. Excludes units equipped with
hydraulic lifters. See Engine.
IMPORTANT NOTE:
required on 14 or 18 kW units with 816cc
engine. See Engine.
Inspect valve clearance after first 25 hours of
operation, then after 400 hour intervals.
Adjust if necessary.

Checking Valve Clearance

WARNING
Risk of Burn. Allow the engine to cool before
performing the following procedure. Failure
to do so could result in serious injury.
WARNING
Accidental Start-up. Disconnect the negative battery
cable, then the positive battery cable when working
on unit. Failure to do so could result in death
or serious injury.
WARNING
Accidental start-up. Disconnect spark plug wires when
working on unit. Failure to do so could result in death
or serious injury.
NOTE: Engine should be cool before checking
valve clearance. Adjustment is not needed if
valve clearance is within dimensions provided
in Engine.
Proceed as follows to check valve clearance.
1.
Close fuel valve and disconnect battery to
avoid accidental startup.
2.
Remove spark plug wire(s), and position
spark plug wire(s) away from spark
plug(s).
3.
Remove spark plug(s).
4.
Remove the four screws attaching the
valve cover. Remove and discard gasket.
(Repeat for second cylinder, if equipped.)
5.
Verify piston is at top dead center (TDC) of
its compression
closed).
NOTE: To move piston to TDC, remove intake
baffle at front of the engine to access the
flywheel nut. Use a large socket and socket
wrench to rotate flywheel nut clockwise, which
will rotate the crankshaft. Watch piston
through spark plug hole. Piston will move up
and down. Piston is at TDC when at its
highest point of travel.
Maintenance
Valve lash not
(000560)
(000130)
(000141)
stroke (both valves
26