Engine shut off while running

[Mydiamond]

Crusader 454 xl gas engines.
Running at 3200 rpm for about 20 minutes - starboard engine shuts off.
No alarm no lights.
It would not start after that. Limped home on 1 engine.

Radio hand control reading low battery.
Had batteries checked all good
House and starter batteries on starboard side.

Any thoughts would be appreciated

[Mydiamond]

Closing this thread.
On top of the engine there are breaker buttons.. fuel pump breaker popped.
Press to reset and engine started right up.

Will continue researching for reasons it would pop.