Just wanted to thank everyone for the help. It turns out that it was the main harness. There were a few wires in there that needed to be re-spliced. Hope this helps a fellow boater one day.
So I went through the thunderbolt troubleshooting and everything checks out. Took the boat out again today. Ran great for 10 minutes, then started stalling out. Would run for a few minutes and stall, run for a few minutes and stall, all the way back to the dock, which was about 15 minutes...
Appreciate all the advice. I’m going to troubleshoot this weekend and report back. Hopefully with my volt meter and a cold one I’ll get to the bottom of it.
I just thought last night about how it would stay running if I held the key in the crank position. Have you ever seen key switches only kill the engine once it was running for over 20 minutes?
Interesting. Maybe that explains why the motor will also run if I hold the key in the crank position, but then die when I let off. I’ll report back as soon as I run the tests. Hopefully this thread will help someone one day.
No luck on the serial number. I guess these engines are not original and we’re replaced at some point.
Any ideas on why the boat when hot will run only when I jump the low oil pressure sensor and unplug the shift interrupter switch at the same time?
I have a 2003 Crownline 290 with twin Mercruiser 5.0L carbureted 220hp engines with Alpha One drives.
Been having an issue with my starboard motor for quite some time. The motor runs great for about 20-25 minutes, and then it randomly shuts off. It will then start, rev and shut off. The next...
New to the forum. I have a 2003 Crownline 290, twin Mercruiser 5.0 engines with TKS carbs.
Boat runs perfect, but sometimes when I cruise for more than an hour, the starboard engine dies as if the key was turned off. Sometimes it will restart right away, other times it has to sit for at least...
