n
WHEN GOVERNOR
IS
PROPERLY
ASSEMBLED
THE
DIMENSION SHOWN
ON DRAWING WILL
BE AS INDICATED
CENTER PIN-
CAMS
HAFT
SNAP RING
GOVERNOR
CUP
GOVERhOR FLYBAL
5
BALL GOVERNOR
io
BALL
GOVERNOR
68
FLYBALL LOCATIONS
CS-1238
FIGURE
10.
GOVERNOR
CUP
DETAILS
GOVERNOR
CUP
With the gear cover removed, the governor cup can be
taken
off
after removing the snap ring from the camshaft
center pin. Catch the flyballs while sliding the cup
off
(Figure
10).
Replace with a new part any flyball which is grooved
or
has a flat spot; the ball spacer if its arms are worn
or
otherwise damaged; the gearlspacer assembly if loose
on gear hub, and the governor cup if the race surface is
grooved or rough. The governor cup must be
a
free-
spinning fit on the camshaft center pin, but without any
excessive play.
When installing the governor cup, tilt the engine
so
the
gear is up, put the flyballs in place (Figure
lo),
and
install the cup and snap ring on the center pin.
The camshaft center pin extends out
3/4
inch
(1
9
mm)
from the end
of
the camshaft. This distance provides an
in-and-out travel distance of
7/32
inch
(5.6
mm)
for
the
governor cup, as illustrated. Hold the cup against the
flyballs when measuring. The camshaft center pin
cannot be pulled outward or removed without damage.
If
the center pin extends out too far, the cup will not hold
the flyballs properly.
If
the distance is less than
7/32“
(5.6 mm), the engine will race, especially at no load.
Remove the center pin and press in a new pin.
TIMING
GEARS
If replacement of either the crankshaft gear
or
the
camshaft gear becomes necessary, always install both
gears new.
Thecamshaft and gear must be replaced asan assembly.
Before removing the camshaft and gear assembly,
remove the cylinder head and valve assemblies.
To remove the crankshaft gear, first remove the snap
ring and retainer washer, then attach the gear pulling
ring using two No.
10-32
screws (Figure
11).
Tighten
the screws alternately until both are tight. Attach a gear
puller to the puller ring and proceed to remove the gear.
Each timing gear is stamped with
“0”
near theedge.The
gear teeth must mesh
so
that these marks exactly
coincide when the gears are installed in the engine.
When installing the camshaft gear and shaft assembly,
be sure the thrust washer
is
properly
in
place behind the
camshaft gear. Then install the crankshaft retaining
washer and lock ring.
10-7
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