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FUEL TANK
REARHOUSE PANEL
Fig. 22
Fig. 23
The cylinder head must be removed if it is necessary to
regrind valves, or to do work on the piston rings or
connecting rod. All of the cylinder head screws are plainly
in view and can be easily removed. Screws of different
lengths are used but these can be properly reassembled
according to the various lengths of cylinder head bosses.
Before reassembling the cylinder head, all carbon and lead
deposits should be removed. It is recommended that a new
cylinder head gasket be used in reassembly, as the old
gasket will be compressed and hard so that it may not seal
properly. Use a mixture of graphite and oil on the cylinder
head screws, the prevent them from rusting tight against
the cylinder block. Tighten cylinder head screws, 28 - 32
footpounds torque. After complete assembly and engine
is run-in, re-torque head screws.
GEAR COVER
Disconnect the governor linkage and remove the governor
assembly. Remove gear cover screws and drive out the two
dowel pins as shown in Fig. 25. The gear cover can then be
taken off, exposing the timing gears as shown in Fig. 26.
In reassembly, tighten gear cover capscrews, 16 - 18foot
pounds torque.
Fig. 24
In reassembly, tighten the nuts for mounting the manifolds
to 32-35 foot pounds torque. Tightening beyond specifi-
cation may cause the flanges to break.
Fig. 25
CAMSHAFT GEAR
Remove the three capscrews and lockwashers which
hold the gear to the end of the camshaft. Note that
the mounting holes in the camshaft gear are staggered
in such a manner that the gear can be assembled to
the shaft only one way which will automatically time
the gear to the shaft. Pry the gear off the camshaft
using a screwdriver or similar wedge tool.
IDLER GEAR AND SHAFT
Remove the Allen head set screw on the magneto
2O
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Troubleshooting
