OC60-E2, OC95-E2, WSM
ENGINE
S-13
Top Clearance
1. Remove the cylinder head. (Do not attempt to remove the
cylinder head gasket.).
2. Move the piston up, and stick a strip of fuse [1.5 mm dia.
(0.059 in. dia.), 5 to 7 mm long (0.197 to 0.276 in. long)] on the
piston head at three positions with grease so as to avoid the
intake and exhaust valves and the combustion chamber ports.
3. Lower the piston, and install the cylinder head and tighten the
cylinder head screws to the specified torque.
4. Turn the flywheel until the piston exceeds its top dead center.
5. Remove the cylinder head, and measure the thickness of the
squeezed fuses.
6. If the measurement is not within the factory specifications,
check the oil clearance between the crankpin and crankpin
bearing and between the piston pin and small end bushing.
A
After checking the top clearance, be sure to assemble the
cylinder head with a new cylinder head gasket.
Top
clearance
Factory spec.
OC60-E2
0.60 to 0.75 mm
0.0236 to 0.0295 in.
OC95-E2
0.65 to 0.80 mm
0.0256 to 0.0315 in.
Tightening
torque
Cylinder head
mounting bolts
OC60-E2
51.9 to 56.8
5.3 to 5.8
38.3 to 42 ft-lbs
OC60-E2
OC95-E2
68.6 to 73.6
7.0 to 7.5
50.6 to 54.2 ft-lbs
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