Start the boat. Drive for 10-15mins, it dies. Starts back up and runs again for a minute then dies. Repeat.
What's wrong with it? I tried rubbing a wet rag on it already.
Chat has aided me in troubleshooting motors since I don't have a depth of experience there. Ij the past i've sometimes thrown parts at a problem. It helped me sort out a pulse carb issue and a way to modernize it on a tow mower I was building.
From Chat:
That symptom pattern—runs fine for 10–15 minutes, dies, restarts, then dies again after a minute—usually points to a fuel delivery or ignition heat issue. Since you already tried cooling it with a wet rag (a classic trick for vapor lock or coil overheating), here are the main suspects:
Likely Causes
1. Fuel Delivery (most common)
Clogged vent in the fuel tank cap → creates vacuum, starving the engine after some minutes. Try loosening the gas cap slightly—if it keeps running, that’s the culprit.
Dirty fuel filter or pickup screen → engine runs until demand exceeds flow.
Failing fuel pump → overheats and quits, works again when cooled.
2. Ignition/Coil Overheating
An ignition coil or power pack breaking down under heat load can act just like fuel starvation. Runs cold, fails hot, then restarts when cooled.
Often shows up as a hard stall, like someone hit the kill switch, rather than a gradual bogging down.
3. Vapor Lock (less common today)
Heat causes fuel to boil in the lines, starving the carburetor/injector. The wet rag trick would normally help here.
Quick Checks
Run it with the fuel cap loosened.
Pump the primer bulb while it’s dying—if it recovers, fuel delivery is the issue.
Check spark right after it stalls. If no spark → ignition coil/power pack.
My guess based on your description
If it bogs down slowly before quitting → fuel issue (vent, filter, pump).
If it cuts off suddenly, like a switch flipped → ignition coil/pack.