Service Manual

5. Pull the cam followers out of the engine.
New parts are identical and may be placed
in either opening. Used parts should be
installed in the original holes to maintain
wear patterns.
Figure 4-29
Figure 4-27
6. If necessary, the governor shaft may be
removed by unseating the retaining ring
and pulling the shaft out of the block. See
Fig. 4-28. There are no seals or
“0” rings in
the block or on the shaft.
Figure 4-28
Compression Release
1. The compression release assembly is de-
signed to hold the exhaust valve off its seat
during start up. This is accomplished by an
additional lobe on the back side of the
exhaust cam that is activated by a flyweight
assembly. The compression release is
shown in Fig. 4-29 as it would be during
cranking or starting.
2. When the engine speed increases, the
flyweight will move in the direction of the
arrow in Fig. 4-30. This will cause the lobe to
rotate exposing its flat edge to the exhaust
cam. This will allow the exhaust valve to
fully close at operating speed. See Fig. 4-30.
3. The flyweight spring is the only replaceable
part. Refer to Fig. 4-30.
I’
FLYWEIGHT
FLYWEIGHT MOVEMENT
Figure 4-30
Piston and Connecting Rod
1.
To remove the connecting rod, straighten
the tabs on the locking plate and remove the
rod cap nuts. See Fig. 4-31.
Figure 4-31
27