Engine alignment assist

bdubey69

Recruit
Joined
Aug 18, 2010
Messages
2
1993 Four Winns Ford 351 OMC Cobra

Need some hints on aligning and shimming? Thanks....
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,802
Re: Engine alignment assist

Inspect the splines on the shaft for visible wear, generally if the splines
are worn then the coupler is also worn. If wear is evident replace the parts
as needed.


NEVER Force the alignment tool in, you can damage the tool and the coupler.

NOTE: If you find the tool will not slide into the gimbal simply remove the
black coating on the largest step with fine sand paper.


1) Once you have the engine height close enough to
fully insert the tool without force, then you can start
working on setting the proper alignment.

Take your time, getting it close enough to insert the
tool the first time can sometimes be the hardest (most
frustrating) part.

2) Coat the end section of the tool (the smallest diameter
area) with a light coat of grease and then insert it fully
into the coupler.

3) Without turning the tool, pull it straight out and look at
the depth of the teeth marks in the grease.

If the teeth marks in the grease are deep on the
top side and shallow on the bottom side of the tool then
your motor is too high.

If the marks in the grease are deeper on the bottom than
on the top then your motor is too low.

4) Adjust the engine height accordingly.

5) Keep checking the depth of the marks in the grease until
they are equal in depth on top and bottom.

Sometimes as little as 1/8th of a turn on the adjusting nut can be the
difference between being properly aligned, and just having it "close"

Lightly Grease the splines on the shaft (and on the coupler if you can) with
Spline grease prior to assembly.
 

bdubey69

Recruit
Joined
Aug 18, 2010
Messages
2
Re: Engine alignment assist

bruceb58
Thanks for the quick response.

Yolk and coupler splines are in good condition.

Tried some of your tips. Got the tool to start in the coupler, but it stops at the taper of the splines. Many attempts of raising and lowering engine, only with the same result.

Is the alignment tool I have to big?
Tool is Mallory Part# 9-79800
Tool diameter for coupler is 1.005
Yolk diameter is 1.125
Didn't have alignment tool when I installed engine, coupler diameter unknown.

Thanks bdubey69
 
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