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Old 06-08-2016, 03:40 AM   #21
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Your a good man Mike. If I ever get to Maryland I would be honored to buy you an adult beverage.
Works for me.
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Old 06-08-2016, 04:16 PM   #22
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Electric pumps do not like to pull fuel, they like to push it. I am assuming when you set up your temp fuel supply the can was higher than the pump and the pump just couldn't generate enough suction to draw fuel through the empty fuel line. The primer bulb might have helped prime the line and pump - which is probably why the previous owner installed it in the first place as a band aid.

Yes, the pumps can simply wear out.

As for the no power to the pump issue, I'd guess there is a either a relay or a fuse somewhere on the positive wire to the pump, but it may not be right near the pump.

As Mike said the oil pressure switch interrupts power to the pump if oil pressure is lost. However, since this is a carb'd engine, the engine would still run for a short time because there would still be fuel in the carb bowl. In other words here's the scenario - assuming everything is working properly: turn key to start position, fuel pump runs and fills carb, engine starts. If there is no OP after engine starts the pump is shut down but the engine will still run for a short time because of the fuel in the carb.

So at this point in your trouble shooting I think you can ignore the oil pressure switch for now.
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Old 06-08-2016, 04:28 PM   #23
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Thank you for the advice SS. I went ahead today and bit the bullet and ordered the correct fuel pump. I was putting it off but since I dont even know if he installed the correct pump, I need to replace it.

To make sure I understand, in normal working conditions, with the key switch on the fuel pump will run until it fills the bowl and reaches it's set pressure?

I noticed a reset button on top of the engine but Im not sure what it's for. Also, I checked all the fuses and they were good. I believe it has to be something simple, because power was getting to the pump before I started messing with everything.
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Old 06-08-2016, 05:06 PM   #24
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To make sure I understand, in normal working conditions, with the key switch on the fuel pump will run until it fills the bowl and reaches it's set pressure?
On a carb'd engine I don't know. But on my FI'd engine that's exactly what it does. I turn the key to Run, the pump runs and pressurizes the fuel lines then stops, I turn the key to Start and it starts. Mike, will know since his is carb'd also, as will others here.

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I noticed a reset button on top of the engine but Im not sure what it's for. Also, I checked all the fuses and they were good. I believe it has to be something simple, because power was getting to the pump before I started messing with everything.
Mine also has a reset button, it's for the all the electrical bits on the engine. The breaker on yours will be for the engine. Definitely see if you can push that button in. If you can, it means it was tripped.

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Old 06-08-2016, 05:46 PM   #25
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Here is the wiring diagram that shows where the power for the pump comes from, you need to verify these sources are working.

Merc electric fuel pump operation.JPG
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Old 06-08-2016, 08:57 PM   #26
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Thank you so much for the help Mike and Dan. I have been working on this boat so much I have neglected a lot of other things around the house. Im sure you guys know the feeling! LOL

If I get get the fire to the fuel pump problem resolved I can take a break for a few days until some new parts are delivered. :-)
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Old 06-09-2016, 01:45 AM   #27
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Thanks for the help guys! I chased down the purple and yellow wire and it wasnt even on the starter. It had to have been just laying on the starter connector when I bought the boat.

Once I connected it I spun the motor over and I was getting about 9 volts at the fuel pump connector. Hope thats ok.

Im gonna wait til the new fuel pump and anti siphon valve come in before I put everything back together.

Thanks to you guys Im learning a lot about this new project so hopefully I can keep it going!
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Old 06-09-2016, 01:49 PM   #28
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I also want to say that I have not worked anywhere near the starter since I got the boat. I truly believe that wire was just laying on the starter terminal when I bought it, and fell off the terminal shortly after I brought the boat home. Im wondering if the poor connection could have been causing all the fuel delivery problems the previous owner had.
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Old 06-09-2016, 03:14 PM   #29
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Guess I may as well post a pic of what you guys have been helping me with.
Attached Images
File Type: jpg Boat.jpg (255.4 KB, 14 views)
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Old 06-09-2016, 05:00 PM   #30
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Nice looking boat but needs some cleaning.
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