Went to the lake this morning for a little fishing and r&r and didn't make it past the decontamination area. My boat fired up like it always does and about 1:30 minutes into the process the engine died. I'm not a mechanic so just made sure things were tight and that gas was moving without any luck. Returned home and hooked it up to the garden hose and it fired right up and ran perfect. Family hopped in the truck and we returned to the lake, the same thing happened. Got home and it fired right up with the garden hose. Could the hot water at decontamination be the problem? Is there a sensor that kills the engine from the hot water? I have been on Powell four times this year and haven't had any trouble. The boat is a Tahoe Q7i with a Mercury 5.0. Any ideas will be greatly appreciated. Thanks.