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Mercury 15XD - Page 105

Mercury 15XD
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TIMING/SYNCHRONIZING/ADJUSTING
Page 2C-12 90-826883R2 JUNE 1998
5. Turn idle speed screw “In” until the cam follower just makes contact with throttle cam
then turn “In” one additional turn to slightly open throttle plate.
a
b
c
a- Idle Speed Screw
b- Cam Follower
c- Throttle Cam
NOTE: The throttle return spring on cam follower plate should just contact the fuel pump
housing at wide open throttle position. If not, adjust the throttle link rod. (Do not allow the
throttle spring to act as a throttle stop).
52912
a
b
a- Contact Point (spring to just contact fuel pump housing)
b- Throttle Return Spring

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