INBOARD (MIE) MODELS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 2B-11
Engine Final Alignment
CAUTION
To avoid vibration, noise and damage to transmission output shaft oil seal and
bearings, engine must be properly aligned.
IMPORTANT: Engine alignment MUST BE RECHECKED with boat in the water, fuel
tanks filled and with a normal load on board.
Engine must be aligned so that transmission output flange and propeller shaft coupler cent-
erlines are aligned and coupling faces are parallel within 0.07 mm (0.003 in.). This applies
to installations with solid couplings, as well as flexible couplings.
1. Ensure that mating surfaces on transmission output flange and propeller shaft coupler
faces are clean and flat.
2. Center propeller shaft in shaft log as follows:
a. Push down and then lift shaft as far as it will move. Then place shaft in the middle
of the movement.
b. Move shaft to port and then to starboard as far as shaft will move. Then place shaft
in the middle of the movement.
c. With shaft in center of shaft log, as determined by above procedures a. and b. align
engine to shaft.
72595
a
b
c
d
a-Propeller Shaft
b-Propeller Shaft Coupler
c-Transmission Output Flange
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