Orion4x4
Active Member
I got a new to me bayliner trophy with a low hour 4.3l MerCruiser swapped in for the original 3.0l. It starts perfect, runs awesome, idles great but always running in at the end of fishing it stumbles and tries to die. It will come up to cruising speed and run awesome for 5 minutes but there it cuts out. It never completely dies but almost then it will try to come back but drops off again. If you throttle back it idles fine but when you throttle back up it will run good for 30 seconds then crap out again. Doesn’t seem to matter if I’m cruising at 2000rpm or 3000rpm. I think it happened on the run out in the morning one time too. I’ve changed filters and cleaned the carb screen too. It has an electric fuel pump on it. I checked when it happened last time and the fuel pump wasn’t hot. Any help would be really appreciated guys.