OX60 shutting down, wont restart for few minutes

[DB Bahamas]

I have twin 2000 OX60 150hpTXRY motors. Both start fine, but after running at cruise speed for 10-15 minutes the starboard engine shuts off. No loss of power or sputtering, just instantly off. If I try to restart right away, it turns over fine, but will not start, but after waiting for 5 minutes or so, it starts right up, and runs for a while fine, then off again. This cycle is repeating, sometimes it takes longer than others for it to shut off. I was told this could be a fuel pump relay?

[rodbolt17]

there is a main relay,no fuel pump relay.
could be a lot of things.
you have to test fuel system and ign AT the failure point.

[jb123]

Check for spark when it happens and keep pressure gauge on to see if its fuel

[DB Bahamas]

there is a main relay,no fuel pump relay.
could be a lot of things.
you have to test fuel system and ign AT the failure point.

I am getting 13v on the blue wire above fuel pump when I turn the key to on, as well as when running, when it shuts off, it is reading 0.1. After a few minutes when I test it, it is back to 13, and the motor starts right up.

[jb123]

test amp draw on hp pump
ever clean/replace vst filter ?
you should check it along with pres reg filter

[DB Bahamas]

test amp draw on hp pump
ever clean/replace vst filter ?
you should check it along with pres reg filter

What is the VST filter? Thanks

[jimwelch11]

DB - if you go to www.simyamaha.com and search of VST, you'll be able to find a nice tutorial on how to change VST. (at least the tutorial is there for my engine)

[DB Bahamas]

Thanks, will change out both.

[rodbolt17]

you need to learn how and why you use a multi meter.
also learn the circuit and how and why it works.
blue at the pump is pump ground path.