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Old 05-23-2020, 03:11 PM
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Surcouf Surcouf is offline
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Shaft too long in coupling ?

Good afternoon,

Trying to install my A4 back in the Catalina where it belongs, removed 6 months ago and partially overhauled.

After a first rough alignement with shaft mid-position, I tried to «*stick*» the coupling to the flange, but they stay around 0.050 of an inch appart.

So 2 things to know:
- I discovered while trying to understand the issue that I install the nut reversed... shame on me, see picture below. But when pushing my fingers inside the coupling, I do not believe that this is actually preventing the coupling to come in proper contact with the flange.
- the coupling is «*frozen*» on the shaft, the square screw that fixed it is completely rounded by the PO and by me when we tried to back the coupling to remove the engine last fall ((We finally pushed the shaft back a little)).

I suspect that the prop shaft is in fact not recessed enough in the coupling and touches the engine threaded shaft before the coupling touches the flange. This would mean that I re-installed the output coupling 0.05 inch deeper... possible?
My plan of Memorial Day sailing are in the drain...
Only solution I see for now is to pull the engine from engine bay (f*%##%)), and either try to pull the coupling a little with heat and an extractor, or worst case, to cut it and install a new one.

Any advice / idea??
Thank you

Nothing will have been easy with that whole work... I like to learn, but I would like things to go my way for once!!
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Last edited by Surcouf; 05-23-2020 at 03:23 PM. Reason: Typo
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