Generac Power Systems 00802-3 - Manual (Page 14)

3. With pliers, lightly compress the spring clip on the carbu­
retor lever arm. This allows the linkage rod to slide freely
through the clip. While the clip is compressed, rotate the
throttle lever in the appropriate direction to increase or
decrease the gap until there is 0.003 inch (0.08-0.5mm)
clearance (Figure 10).
Figure 10 — Adjusting Throttle Linkage
4. Release spring clip so you can secure adjustment. This
allows the carburetor and the electronic governor to be
synchronized.
ADJUSTING THE CARBURETOR
The carburetor of your generator is preset at the fac­
tory. The carburetor should not be tampered with, as
this will void the emission control system warranty. If
your generator is used at altitudes in excess of 5,000
feet, consult your Generac Authorized Service Facility
regarding high altitude jetting changes.
ADJUSTING VALVE CLEARANCE
After the first 50 hours of operation, you should adjust
the valve clearance in the engine.
When adjusting valve clearance, the engine should
be at room temperature and the piston should be at
Top Dead Center (TDC) of its compression stroke
(both valves closed). Correct clearance is 0.001-
0.003 inch (0.03-0.07mm). Adjust valve clearance as
follows:
1. Loosen the rocker arm jam nut. Use an alien wrench to
turn the pivot ball stud while checking clearance between
the rocker arm and the valve stem with a feeler gauge
(Figure 11).
Figure 11 — Adjusting Valve Clearance
2. When valve clearance is correct, hold the pivot ball stud
with the alien wrench and tighten the rocker arm jam nut
with a crows foot. Tighten the jam nut to 65-85 inch-
pounds torque. After tightening the jam nut, recheck valve
clearance to make sure it did not change (Figure 12).
Figure 12 — Tightening Jam Nut
Tighten Jam Nut to
65-85 inch-pounds
(7-10 N-m)
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12
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