I have a universal 5411 diesel engine in my sailboat and I recently had my top speed drop from 6 to 2 knots. The transmission still works in fwd & rev. it just has lost its push? I wonder if the transmission can be fixed or will this call for a new or rebuilt tranny? The fluid level seems ok and the engine runs fine. It is tough to find much info on this kind of problem, got any suggestions?
Thanks, Phil