Cummins PT type G fuel pump help

Not a truck, but wasn’t sure of which forum to post in. This is a KTA-19 marine engine. Have two now that has been intermittently shutting down. I’ve checked the usual, fuel supply, electrical connections. Does not do it with the screw turned in.

They only shut down when the engine is hot, throttled down to idle, put into neutral then back into gear.

My assumption is that the engine idle in gear was dropping too low causing the oil pressure to drop and triggering the shut down. All of...

Cummins PT type G fuel pump help