ringmaster
Petty Officer 2nd Class
- Joined
- Aug 23, 2007
- Messages
- 125
i have a 1977 sea ray with a 233 mercruiser and pre alpha outdrive. yesterday i took the boat for one last ride. it was a 3 our ride total on the way back i was cruising at 3200 rpms roughly 30mph. all of a sudden my rpm's jumped to 4000. i quickly idled down and trimmed the outdrive all the way down. my boat never stoped moving so i took it slow at taking off agian. the boat got right up out of the water and ran great but as soon as i would try to trim it out agian the rpm's would rise but as long as i kept the outdrive trimmed all the way down it would run fine. could the coupler or the prop be slipping?