I've trawled the net and am struggling to find the info I'm looking for, so I'm hoping some of you knowledgeable folks will able to help, or at least point me in the right direction.
Colvic 26 sailer
Petter twin engine removed, stern tube assembly removed, cutlass bearing renewed, and everything refitted.
Existing shaft size 1"
New engine going in is a new Kubota 602 (16hp which is possibly a bit more power than required but it was cheaper than all the alternatives!)
On fitting the prop shaft it appears to have minimal clearance to the stern tube i.e. about 2mm total, or 1mm at any given point, is this enough and if not what should the minimum amount of clearance be?
My concern being that even small engine movement could make the shaft wear on the stern tube.
Next question (related to the above):
The prop shaft is machined down from to 3/4" od at the gearbox end to take the drive flange
Will the reduced diameter be okay for the engine HP?
Or should I be looking at a new 1" shaft, and dependant on the answer to the first question, a new stern tube as well?
Any and all help much appreciated (I will eventually stop asking questions, and may even be able to answer some in the distant future! )