rookyboatman
Recruit
- Joined
- May 28, 2018
- Messages
- 1
My F90LA (new 2013) Yamaha 4 cy on my 24 ft pontoon boat runs good at rmp's below 4000. At 4000 and above, it runs ok for a few minutes then reduces rmp's to 3000 - to 3500. After a minute or so, the rpm's go back to the original level. It does this over and over. It has 75 hours run time. I've put in extra gas additive but it hasn't made any difference. Do I have a filter issue or something more serious in the computer?