MAINTENANCE
3-8
Clean the carbon deposits from the spark arrester
screen (1) with a wire brush.
Check the spark arrester screen for damage. If the
screen is damaged, replace the spark arrester.
Reinstall the spark arrester to the muffler.
Install the muffler protector (side mount type only).
IDLE SPEED CHECK/ADJUSTMENT
Start the engine and allow it to warm up to normal
operating temperature.
Turn the pan screw (1) of the control to obtain the
specified idle speed.
VALVE CLEARANCE CHECK/
ADJUSTMENT
Remove the four flange bolts (1) and the each valve
cover (2).
Remove the fan cover protector or screen grid (page 5-
2).
Disconnect the spark plug caps (3) from the spark
plugs.
Set the piston of the No.1 cylinder at the top dead
center of the cylinder compression stroke (both valves
fully closed) by rotating the flywheel (1) clockwise
slowly. When the No.1 piston is at the top dead center
of the compression stroke, the “T” mark (2) on the
cooling fan will align with the right side alignment mark
(3) on the fan cover.
If the exhaust valve is opened, rotate the flywheel and
align the “T” mark on the cooling fan with the alignment
mark on the fan cover again.
(1)
IDLE SPEED: 1,400 ± 150 min
-1
(rpm)
(1)
(2)
(1)
(3)
(2)
(1)
(3)
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Summary of Contents for GX 630RH QZB2
Page 17: ...MEMO ...
