Finically found it, so simple, plug on the harness was bad, making bad connection. Crimped on new ends and put a new plug on. All fixed
thanks everyone for the help and suggestions
Right now im working on finding the plug that goes on the end of the engine harness where the fuel pump plugs in. Fuel pump is brand new, so im guessing the boat harness plug is prob the culprit since its 22 years old
Put a fuel pressure gauge on the fuel rail, turn the key on and it builds pressure to 43ish. When it’s sitting at idle it’s at 38psi.
it almost stalled once, pressure dropped down into the low 30’s and then it bounced back up to 38 without stalling.
This was a thought also. I recently saw another post somewhere with a photo of this merc/seirra replacement relay socket. Any idea on the part number for it?
I’ll give that a try next. Just had it running on muffs for about 15min and it died out. Turn key off and back on and pump cycled. Started right back up. This is driving me nuts
Just put new pump in as I thought the old one was dying because of intermittent behavior.
cycling key now and the pump is kicking on every single time. Hard to troubleshoot when its working correctly at the moment!
problem likely to act up again when I put the boat back in and try to use it...
well before even trying to crank the boat, the fuel pump isn’t kicking on.
I’m in the engine bay now poking around and pump is working consistently at the moment.
2001 Sundancer 260 7.4MPI
Installed new fuel pump, old one seem to be failing, intermittently working. New one installed, boat fired right up, ran it on and off a couple times while sitting on trailer with muffs. Towed to boat to ramp and dropped in, started at dock and sputtered out after a...
yea clearly. What hurts more is that this is going into my boat that I'm currently selling. I'd like not to dump a lot of money into it, but I also want it fixed correctly so the next person buys something reliable!