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Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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Starts but won't stay running. Rpm doesn't seem to be a

Customer Question

Starts but won't stay running. Rpm doesn't seem to be a factor. Just reading how the "oil pressure switch" be a factor. Trying to find out where it is. 190 hp, six cyl. Volvo Penta I/O
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Submitted: 1 year ago.
Category: Boat
Expert:  Tan replied 1 year ago.

Hello. My name is Tan.

Could I get the engine model number please?

Customer: replied 1 year ago.
Customer: replied 1 year ago.
That's all it says for "model number". Serial number is *****
Customer: replied 1 year ago.
Whoops...bit more 4.3GL-J
Customer: replied 1 year ago.
I may try a live call but cell service is so bad at Dick I doubt we can keep it going. I'm up at the house on the Internet.
Customer: replied 1 year ago.
Sorry, that should be "at dock". I you are willing, we can try texting for a bit
Expert:  Tan replied 1 year ago.

Thank you that's it.

Ok we need to check the green wire coming from the alternator. Once the engine starts the alternator sends voltage to the fuel pump.

We need to check for voltage on the terminal # ***** of the relay when engine starts.

Expert:  Tan replied 1 year ago.

You can also check for voltage at the green wire terminal on the back of the alternator.

Customer: replied 1 year ago.
Whoops. Ok, I don't know that I have a voltmeter. I will go look (I've not got a lot of tools). Had the alternator replaced when they winterized the boat, trying it for first time yesterday and had the problem. They are too busy to come, since it's Memorial Weekend but when you suspect the (just replaced) alternator wires, I am pissed off beynd belief here. I wonder if they even started/ran the thing.Ok, thank you Tan. I need to find if I have a voltmeter.
Expert:  Tan replied 1 year ago.

Ok we can do another thing disconnect the green wire from the alternator and touch the green wire to the large terminal of the alternator the fuel pump should run. Does the pump run?

Customer: replied 1 year ago.
Let me go down to dock and try
Customer: replied 1 year ago.
Do I need the key on? Or is this all powered by battery?
Expert:  Tan replied 1 year ago.

Long as the battery is on it will run the pump. The green wire will be in a plug you will have to get a piece of wire to stick in the plug at the green pin then touch the large terminal with the orange wire. You can use a paper clip straightened out to use as a jumper.

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