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ENGINE MAINTENANCE - 11
ENGINE ALIGNMENT
CAUTION
Engine must be properly aligned, or vibration, noise
and damage to the transmission output shaft, oil seal,
and bearings may result.
IMPORTANT: For PCM Power-Plus V-Drive
applications, adjust the engine and V-Drive mounts
to achieve alignment. The Transmission mounts are
for support only and, are not used to achieve proper
alignment.
Oil Fill/Drain
Plug
Raw Water
Drain Plug
Figure 11-23 PCM V-Drive
V-DRIVE ALIGNMENT
The Transmission support mounts must be removed
before performing the engine alignment. Alignment is
achieved using the Engine front mounts and the PCM
V-Drive rear mounts.
• Alignment with a PCM V-Drive: loosen the
trunnion bolts on the TRANSMISSION mounts,
then remove the bolts used to attach the mount to
the Transmission. Slide the mount away from the
transmission.
Perform the Engine Alignment as outline in the following
steps. When you have completed the alignment you
will need to re-install the mounts onto the Transmission.
The Transmission mounts may need to be adjusted so
there is no tension on the mounting bolts as they are
re-installed. Re-tighten all trunnion bolts to complete the
V-Drive alignment.
NOTE: Some PCM V-Drive configurations use
only engine and transmission mounts. Alignment is
accomplished using those mounts.
38
R041091
OR
FULL
LOW
Oil Fill/Drain
Plug
ENGINE ALIGNMENT
IMPORTANT: Engine alignment MUST BE
RECHECKED with the boat in the water, fuel tanks full
and with a normal load on the boat. Engine must be
aligned so that the transmission and the propeller shaft
coupling center lines are aligned, and coupling faces
are parallel within 0.003 in. (0.07 mm). This applies
to installations with solid couplings, as well as flexible
couplings.
1. Check the mating surfaces on the transmission
and the propeller shaft couplings. Make sure
they are clean and flat (Figure 11-24).
Figure 11-24 Shaft Mating Surface Check
2. Center the propeller shaft in the shaft log as
follows: (Figure 11-25)
•
Push down and then lift the propeller shaft as
far as it will move, then place the shaft in the
middle of the movement.
•
Move the shaft to the port and then to the
starboard as far as the shaft will move,
then place the shaft in the middle of the
movement.
•
With the propeller shaft in the middle of the
shaft log, align the engine to the shaft.
L510010D-17
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