Honda GX240RT2 Service And Repair Manual page 228

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 com-
pression 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 projection (3)
on the fan cover (4).
If the exhaust valve is opened, use the recoil starter to
turn the crankshaft one additional turn and align the tri-
angle mark on the starter pulley with the projection on
the fan cover again.
Insert a thickness gauge (1) between the valve rocker
arm (2) and valve stem (3) to measure the valve clear-
ance.
VALVE CLEARANCE:
IN: 0.15 ± 0.02 mm
EX: 0.20 ± 0.02 mm
If adjustment is necessary, refer to
gx240ut2_gx270ut2_gx340ut2_gx390ut2
page 3-4.
(3)
Pull slowly
(2)
(1)
(2)
(2)
(1)
(3)
(1)
(4)
(3)