I'm not sure of how you deal with the dissimilar metals in an aluminum hull,
however all the standard cutlass bearings I have dealt with had a bronze
outer shell. Seems like a problem waiting to happen.

I would think you would want to fit a none metallic insulator between the
two.

For a boat this size, you should be looking for a shaft size of at least
1.125" so that only leaves you 0.3875 clearance for the bearing shell and
rubber material.

I would recommend you look through some standard cutlass bearing specs and
see if there is anything close, if you have the existing tube line bored
in-place, to the closest fit.

Otherwise you might consider welding in a new stern tube that will fit your
shaft and cutlass needs.

My opinion and (limited) experience. FWIW.

Steve
s/v Good Intentions


"Paul Baker" wrote in message
om...
Hello all.
I have a 34' aluminum sailboat hull that was built some time in the
late 1970's but never finished until now. The stern tube is sch.80
aluminum pipe and was welded by the builder, my question is two fold,
first does any one know of a cutlass bearing to fit pipe approx 1.9".
And second the stern tube seems too be a bit oval, maybe (3/64"-1/32")
probably from welding. Any suggestions?
Thanks Paul