Adjust Valve Clearance - Generac Power Systems 0K2502SPFR Owner's Manual

A
Figure 4-9. Remove AVR Fan Connector
B
Figure 4-10. Remove AVR Fan Screws
5. Remove spark plug cables from spark plug
terminals.
NOTE: When disconnecting spark plug cable from
spark plug terminal, always grasp and pull on the
boot at the terminal end of the cable. Pulling on cable
portion can result in parts damage.
6. Thoroughly clean area around spark plugs.
7. Remove spark plugs from cylinder head using a 5/8
inch spark plug socket.
8. Remove four screws to release valve cover.
9. Move piston to Top Dead Center (TDC) of
compression stroke (both valves closed). Proceed
as follows:
a. Remove intake screen at front of engine to gain
access to flywheel nut.
b. Place large socket and socket wrench on fly-
wheel nut and rotate engine in a clockwise
direction while watching piston through spark
plug hole.
NOTE: Piston is at TDC when it is at the highest point
of travel.
Owner's Manual for 60 Hz Synergy Generator™
10. Insert a 0.002 - 0.004 inch (0.05 - 0.1mm) feeler
gauge between rocker arm and valve stem.
Clearance is correct when a slight drag is felt while
sliding feeler gauge back and forth. Verify that
clearances are within the following specification:
• Intake and Exhaust: 0.002 - 0.004 inch (0.05 -
0.1mm)
11. Proceed as follows:
a. If valve clearance adjustment is required, see
Adjust Valve
b. If valve clearance is within specification, see
001404
steps 5-12 under

Adjust Valve Clearance

1. Loosen rocker arm jam nut. Use an Allen wrench to
turn the pivot ball stud, while also checking clear-
ance between rocker arm and valve stem with the
feeler gauge.
NOTE: Hold the rocker arm jam nut in place as the
pivot ball stud is turned.
2. When the correct valve clearance is obtained, hold
the pivot ball stud in place with the Allen wrench
and tighten rocker arm jam nut until snug.
3. Using a torque wrench, tighten jam nut to 174 in-
lbs (20 N-m).
001414
4. Recheck valve clearance to verify that it did not
change during tightening of the jam nut.
5. Install new valve cover gasket.
6. Start four screws to install valve cover.
7. Verify that valve
positioned, and then alternately tighten screws to
6-9 ft-lbs (8-12 Nm) using a crosswise pattern
8. Finger tighten spark plugs into cylinder head, and
then using a spark plug socket, tighten to 15-18 ft-
lbs (20-25 Nm).
9. Install spark plug cables onto spark plug terminals.
Maintenance
Clearance.
Adjust Valve Clearance.
cover gasket is properly
27