altrocker1
Seaman Apprentice
- Joined
- Aug 27, 2011
- Messages
- 40
my 62 fd started surging yesterday at wot...stayed running but would run up and down every few seconds. i don't have any way to measure rpms, but i also don't think the high rpms it hit still didn't feel like it was running full out. primer bulb felt firm the whole time. did it on the way out to my spot, but on the way back it was fine. it ran right back up and got the boat right on plane. today, on 3 passes across the lake it was fine but on the last pass back towards the ramp it started surging again. it seems to be idling smooth. new coils were put in a few days ago, but this feels like fuel issue to me. the fuel pump is original...someone told me you can replace them with a newer 9.9 pump? is this true? what else should i check. motor has good compression...my only other concern is that i know there might be some ethanol in the tank. its nearly impossible to find non ethanol fuel in iowa