Have Boat Questions? Ask a Boat Repair Expert.
Hello, my name is***** will assist you.
First off, do a compression test on the engine. Make sure that they all are even and over 90 PSI. If that is good, the issue sounds like a vapor lock issue. Try next time that you are out, after running the engine and stopping, take the engine hood off until you are ready to restart the engine. If it will now start, you will have a cooling issue on the engine. Replacing the water pump and the thermostats would be a place to start for it.