HELP!..I have no flow from my main tank just my aux..

[TrophyPro-87]

I recently purchsed my first fishing boat, an 87 GW Trophy Pro, and the Aux tank is the only one I can use. When ever I switch the engines to the main tank the port engine ball pump starts to freeze up a little and won't run, the starbord engines ball pump completely freezes ( stays collapsed ) up and is getting no gas at all. As soon as i switch the levers back to the aux tank the ball pumps release and I am able to give them a few pumps to start the engines off of the aux tank.

Can anyone help?

THANKS!!

 

[capt sam]

Re: HELP!..I have no flow from my main tank just my aux..

you have a blockage between the tank and the bulb, check the vent, fuel lines, water/fuel seperator. Could also be the switch itself.

 

[TrophyPro-87]

Re: HELP!..I have no flow from my main tank just my aux..

"you have a blockage between the tank and the bulb, check the vent, fuel lines, water/fuel seperator. Could also be the switch itself."

Thank you!

I am going to sound like a complete idiot here but,...
1. How do I locate and check the vent?
2. I assume I have to drain the 150 gallons of fuel to remove and check the lines?
3. The water fuel seperators are between the switch leg for the tanks and the engines, can it still be a problem with the seperators?
4. With there being two different switches, one for each engine, is it possible to have the same problem with both?
5. Are there two lines coming out of the mnain tank or is there just one that then splits into two?

This boat is a 1987 Grady White Trophy Pro 25

Thank you so much to who ever answers these questions for me!! I am dying to get out to the stream which is why I bought the boat.....

 

[capt sam]

Re: HELP!..I have no flow from my main tank just my aux..

Do you have one switch that goes from one tank to the other? Switches are a common issue on boats, I would probably check that first, take the wires off the side that works and put them on the main tank side and see if that helps.

You should have an access hatch to the top of each tank, open it and see if you can locate the fuel line going to the fuel/water seperator and also check for another line going to the vent. I would take both off and blow some compressed air thru them, even if it's just an aerosol can of air, you'll know if it's blocked or not. I'd replace the seperator filters anyways just to be safe.