For the past 3 months my engine has been running at high RPMs (7000) when wide open and trimmed up. I have a Ranger RT198 aluminum boat. Normal is around 5800. I had the boat in the shop and they can’t find anything wrong. It started surging on me yesterday. Everything is still set at factory settings. No jackplate and it came with a 24p 3 blade prop. Any suggestions or thoughts is appreciated. I’m not sure what to do from the point. We are going to drain the tank to see if I may have gotten water in it, but still can’t explain the high RPMs. Running non-ethanol fuel too.
