Engine Final Alignment
3. Check that coupling centerlines align, by butting
propeller shaft coupler against transmission out-
put flange. Shoulder on propeller shaft coupler
should engage recess on transmission output
flange face with no resistance.
!
CAUTION
To avoid vibration, noise and damage to trans-
mission output shaft oil seal and bearings, en-
gine must be properly aligned.
NOTE: Some propeller shaft couplers may not have
a shoulder on mating face. On these installations,
use a straight edge to check centerline alignment.
IMPORTANT: Engine alignment MUST BE RE-
CHECKED 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 centerlines are
aligned and coupling faces are parallel within .003 in.
WRONG
(0.07mm).
This applies to installations with solid cou-
plings, as well as flexible couplings.
RIGHT
1.
2.
Check mating surfaces on transmission output
flange and propeller shaft coupler faces to make
sure they are clean and flat.
WRONG
Follow instructions “a” or “b”:
72597
a. On V-Drive Transmission Models: Proceed
to Step 3.
4. Check for angular misalignment, by hand holding
coupling faces tightly together; check for a gap
between faces with a .003 in. (0.07 mm) feeler
gauge at 90° intervals.
b. On Down Angle Transmission Models:
Center propeller shaft in shaft log as follows:
(1)
(2)
(3)
Push down and then lift shaft as far as it
will move. Then place shaft in the middle
of the movement.
Move shaft to port and then to starboard
as far as shaft will move. Then place shaft
in the middle of the movement.
a
With shaft in center of shaft log, as deter-
mined by above procedures (1) and (2),
align engine to shaft.
b
a
d
c
50609
V-Drive Shown - Down Angle Similar
c
a - Feeler Gauge (Check At (90 Degree Intervals)
b - Transmission Output Flange
c - Propeller Shaft Coupler
b
72595
a - Up
b - Down
c - Port
d - Starboard
Index
90-823224--2 796
MIE MODELS - HURTH TRANSMISSIONS - 2D-5
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you