Logo

Unable to achieve topend performance

dave_laurie

New member
"I have a 15hp Yamaha FMHS out

"I have a 15hp Yamaha FMHS outboard which until recently performed perfectly. However, on opening the throttle anywhere past about a third open,it has suddenly started vibrating badly and not giving any additional drive. It is as if there was a clutch in the drive train which is slipping. It starts and drives at low revs without problem. I refuelled the tank shortly before the problem manifested itself but the fuel mixture was correct and the supplier was a major distributor.
Help, please!!
Regards,
Dave Laurie"
 
Back
Top