I seem to be having an upper cone clutch
problem with the SD40 Yanmar saildrive
, but I am not entirely sure.. The symptoms are the drive engages and works fine when cold, but after warm up the propulsion
decreases, but only in reverse. The gear oil
looks fine, no metal dust, no clouding, no burnt or smelly residue.
I went through the process of changing oil
to a high quality synthetic with an oil stabalizer, then shifted the transmition a number of times from forward to reverse and again the transmission
always engages. But after getting slightly warm propulsion
again decresses in reverse.
If anyone is familiar with these drive symptoms, please let me know.
And, if anyone has changed out this upper cone clutch
on the SD40
I would really appreciate a heads up on the procedure. I do have a service
manual and parts
catalog on order.