GOVERNOR CUP
*33«a.
ROLL PIN
ROTATE
GOVERNOR CUP
SO THAT ROLL PIN
FITS INTO THE
METAL LINED
HOLE IN THE CUP
GOVERNOR ARM
GOVERNOR SHAFT
GOVERNOR
SHAFT YOKE
(Smooth Side
Towa
rd
Cu p)
OIL SEAL
'GOVERNOR
SHAFT
IF FEELER WILL
ENTER HOLE 1/2'
BALL HAS
FALLEN OUT
FIGURE 20. GEAR COVER ASSEMBLY
GEAR
COVER
After removing the mounting screws, tap the gear
cover gently with a soft faced hammer to loosen it.
When installing the gear cover, makesure thatthepin
in the gear cover engages the metal lined (smooth)
hole in the governor cup. Turn the governor cup so
that the metal lined hole is at the three o'clock
position.
The smooth side of the governor yoke must
ride against the governor cup. Turn the governor arm
and shaft clockwise as far as possible and hold in this
position until the gear cover is installed flush against
the crankcase. Be careful not to damage the gear
cover oil
seal.
Adjust the roll (stop) pin to protrude to a
point 3/4" from the cover's mounting surface.
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 21).
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; 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 (equally
spaced) and install the cup and snap ring on the
center pin.
The camshaft center pin extends out 3/4" from the
end of the camshaft. This distance provides an in and
out travel distance of 7/32" for the governor cup, as
illustrated.
Hold the cup against the flyballs when
measuring. If the distance is less (the engine will race
especially at no load) remove the center pin and press
in a new pin or grind off the hub of the cup as required.
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.
GOVERNOR CUP
TO CENTER OF
SNAP RING
DIMENSION SHOULD
BE 7/32"
7/32"
CENTER PIN
SNAP RING
GOVERNOR CUP
GOVERNOR
FLYBALL
FIGURE 21. GOVERNOR CUP DETAIL
27
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