"Seahag" wrote in message
news:0Mbsi.8328$xi.2815@trndny03...
Our 4107 croaked and I have a 4108 rebuilt long block sitting in the
saloon awaiting installation. We have a Thames tranny and the consensus
is to get a new transmission. The mechanic mentioned putting in a drive
saver to extend the shaft to fit the new set-up rather than buying a new
shaft at this time. From photos it looks like the shaft is around 10'
long...heh We could use a bottom job this year so hauling isn't a huge
problem but it would be kinda nice to have a working engine now.

So what do you all think about drive savers? Strike me I should just put
the money into the new shaft...

Seahag

I agree. The existing shaft probably has some wear around the stern gland
and outer bearing anyway and unless the drivesaver leaves the shaft in
_exactly_ the same position (which is unlikely) the wear step will have
moved a bit and then the lip of the worn portions can cause leakage or
bearing problems. Also, you have a long shaft which will in itself
introduce a litle more flexibility than a very short one if you do hit
something very hard and therefore any shock loading on the transmission will
be somewhat reduced. A new shaft and new outer bearing will give you a good
setup to go with your new motor.