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Thread: 2nd tank issue

  1. #21
    Member KantishnaCabin's Avatar
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    Quote Originally Posted by c6 batmobile View Post
    Both have the same distance of line to the "T". I assumed a blockage at first so I back flushed the line with air and drained the tank a week later. The gas was pretty clean. I put a new fuel line and elbow fitting on the tank assuming that was the next place air could get it. I also checked the vent line and blew it out with air. Nothing in it. I thought the crack might be in the pickup tube and thats why I put a smaller diameter tube in there. Is it possible the 5/16 diameter tube wont supply sufficient fuel for the demand?

    My concern is if I add an electric pump it will still just pump the air bubbles now just faster.
    It is possible, but unlikely. The smaller diameter tubing is not ideal but it shouldn't be causing the problems you described. The restrictions in your 3-way are probably smaller than 5/16th. I'm willing to bet its a tired pump.

  2. #22
    Member KantishnaCabin's Avatar
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    Or I guess you could have a crack in your 3-way valve. I've seen that happen too. Water could have been in the closed section and it froze over the winter. That would explain why one way works fine and the other doesn't hold pressure.

  3. #23
    Member KantishnaCabin's Avatar
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    One cheap way to see if you have air bubbles being drawn into the fuel line is to get a small loop of clear tubing and insert it in your fuel line. Barb one end of the loop with a male barb. Disconnect the fuel line from the tank and connect the clear tube between the tank and your regular fuel line. Repeat after the 3-way and after the racor. You will see the air bubbles in the clear line if there is an air leak. That will pinpoint where your problem is if its an air leak.

  4. #24
    Member c6 batmobile's Avatar
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    I picked up an electric helper pump last night and Im going to get a new motor pump as well this week. I replaced the "T" as well. I'll take it for a spin this weekend and see if the symptoms improved.
    Makin fur fins and feathers fly.

  5. #25
    Member c6 batmobile's Avatar
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    Replaced the T fitting with a new brass one. Added an electric helper pump and got another 1/4 turn out of the fitting on top of the tank.

    I had to pull the "helper" pump out because it wasn't pushing the advertised fuel load. By tying both tanks together and removing that odd ball vent that was in by the fuel filter the boat will run to full RPM now. I was able to push all 4400 rpm out of it on the lake and ran it for about 15-20 minutes in circles with no issue.

    The only problem I have now is the idle wants to be a little low. I may need to adjust the carb to give me a few hundred more rpm at idle so it doen't choke out.

    So to summarize: Added a new smaller diameter pickup tube inside the old one. Replaced tank top fitting and "t" fitting, replaced fuel line, removed vent in front of fuel filter.
    Makin fur fins and feathers fly.

  6. #26
    Member KantishnaCabin's Avatar
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    Glad to hear that you got it worked out.

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