2016 F70 Issues

[F25Portable]

Running that long before shutdown, and then needing an hour of cooldown before running properly again screams ignition to me. Sounds like a coil breaking down. Coils seem to be way better than they were 20 years ago but if that isn't the textbook definition of an ignition break down then I don't know what is.

[Gatorlizard]

I got an inline spark tester and fuel pressure gauge. I'll try to see what tail to chase this weekend.

[99yam40]

you try running it with the fuel tank cap loose or off?
Just in case the vent is not working properly.

have you checked to see if spark is going away when it shuts down and will not start back up?

[Gatorlizard]

2016 F70 with less than 70 hours. New boat to me. Starts and runs like a champ for an hour and shuts down. Let it sit for an hour and it starts/runs fine for another hour and shuts down again. The boat is 21 years old so I replaced the fuel line, pickup, bulb and added a Racor filter/ water separator for good measure. Any ideas?