Valve Clearance Check/Adjustment - Honda GX240 Technical Manual

Valve Clearance Check/Adjustment

Remove the head cover bolt (1), the head cover (2), and the head cover
packing (3).
Disconnect the spark plug cap from the spark plug.
Set the piston near top dead center of the cylinder compression stroke (both
valves fully closed) by pulling the recoil starter slowly. When the piston is
near top dead center of the compression stroke, the triangle mark (1) on the
starter pulley (2) will align with the top hole (3) on the recoil starter case (4).
If the exhaust valve is open, use the recoil starter to turn the crankshaft one
additional turn and align the triangle mark on the starter pulley with the top
hole on the recoil starter case again.
Insert a thickness gauge (1) between the valve rocker arm (2) and valve
stem (3) to measure the valve clearance.
VALVE CLEARANCE:
IN: 0.15 ± 0.02 mm
EX: 0.20 ± 0.02 mm
If adjustment is necessary, proceed as follows.
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GX240 • GX270 • GX340 • GX390 (UT2/RT2) Technical Manual
Pull slowly.
(4)
(1)
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(3)
(1)
(2)
(2)
(1)
(3)
(2)
(3)