2000 GT-40 won’t restart once warm

I know very little to nothing about the newer boats, but this is a strange problem. What could opening the doghouse possibly have to do with the engine starting or not. Does your boat have a fume detector that locks out the ignition? Opening the doghouse releases teh fumes. I know, a long shot but noone else is offering to help.

Does you boat have a ballast resistor, I would think not...

Does it start immediately upon opening the dog house or are you just helping something to cool down like the engine. Does you boat have a over temp sensor that keeps it from starting?

Good luck.

I was told that lifting the hood relieves vapor lock. Obviously that is an uncool way to fix it, but if it is vapor lock perhaps a higher output blower motor might help or better hood ventilation.