Yamaha C-50, Rigging Manual

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2-27
Outboard Rigging Guide - 2001
Jet Drive Eng. Mtg., Maintenance,
Shift Cable Instruction, Service Info.
Adjustments
Shift Cam Assembly
with Neutral Adjustment
A shift mechanism has been incorporated that
includes an adjustable shift cam. When properly
adjusted and in the neutral position, the forward
thrust of the jet outboard will be negligible
Neutral Adjustment - All Models
a. Loosen the inner pivot bolt for the shift cam.
b. Using light finger pressure on the gate, move
the gate toward reverse until the cam roller is
nested in the neutral notch of the cam.
Holding the gate in this position, rotate the
eccentric until the gate clears the underside of
the nozzle hood by the width of the clearance
gage. Keep the high lift side of the eccentric
facing in the upper side of the circle during
this adjustment. Tighten the bolt to lock the
hex cam eccentric in this position. Torque to
8 ~ 9 ft-lbs. Recheck the setting.
c. Adjust the shift cable ends and the cable
anchor bracket on the jet drive so the roller is
in the neutral nest when the shift handle is in
neutral. Tighten both cable and nuts.
d. Shift to forward. The roller should be at the
end of the slot in the cam so the gate cannot
be forcibly rotated toward reverse. Pull on the
gate by hand to verify this.
If the forward lock condition is not met, read-
just the cable positions, giving less impor-
tance to the roller position in neutral.
e. If the neutral position is too far out of adjust-
ment, the tendency of the gate to move
toward reverse, under water pressure, will put
tension on the cable while in neutral. In some
remote control boxes, this makes it difficult
to reengage the shift mode with the motor
running in the high-speed idle, cold-start set-
ting. It is then necessary to stop the motor,
operate the shift handle to engage the shifting
pin, and then restart the motor.
CLEARANCE GAUGES-FULL SIZE
CUT OUT AND USE TO SET ECCENTRIC
FOR NEUTRAL POSITION.
If not properly adjusted, the reverse gate can
be engaged by forward motion of the boat.
This will cause the engine to kick up and out of
the water, a situation similar to hitting a sub-
merged object in a propeller-driven craft.
Do not be concerned if, after proper linkage and
cable adjustments, the reverse gate does not fully
close when the shifter is operated; water pressure
will close it all the way during normal operation.
#1173 LARGE SERIES
2-1/2” EXHAUST PIPE
15/32”
WARNING
#11763 MEDIUM SERIES
2” EXHAUST PIPE
9/16”