3.41
ENGINE
5. Lubricate the washers and the threads of the cylinder
head bolts and install the bolts with washers.
6. Torque the cylinder head following the procedure and
pattern below.
• Tighten M10 bolts to 18.5 ft. lbs. (25 Nm)
• Loosen 180 degrees
• Tighten to 11 ft. lbs. (15 Nm)
• Tighten 90 degrees
• Tighten 60 degrees
• Tighten 6mm head & base bolts to 8 ft.lbs.(11 Nm)
CAMSHAFT INSTALLATION & TIMING
IMPORTANT CAMSHAFT TIMING NOTE: In order to
time the camshaft to the crankshaft, the piston must be
precisely located at Top Dead Center (TDC). If flywheel
key and flywheel are not installed, install them at this
time. The recoil housing must also be temporarily
installed to use the timing inspection hole.
1. Rotate the crankshaft until the “T” (Top Dead Center)
timing mark on the flywheel is aligned with the mark
in the timing inspection window of the recoil housing.
Be sure to use the correct mark when installing the
cam. Do not use any advance timing marks.
2. Apply engine oil or starter drive grease (molybdenum
disulfide paste) to the camshaft main journals and
cam lobes. Lubricate automatic compression release
mechanism with clean engine oil.
3. Orient the camshaft with the lobes facing downward,
and install the cam into the cylinder head.
4. Disconnect the wire or tie strap securing the cam
chain (if used).
5. Be sure the pin on the camshaft is pointing DOWN.
CAUTION
Serious engine damage will result if the camshaft is
not properly timed to the crankshaft.
2
4
5
6
1
6 mm
Cylinder Head / Cylinder Base
3
Forward
Starter Drive Grease:
(PN 2871460)
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