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Thread: primer bulb question

  1. 02-23-2018, 08:42 PM #1
    turkeyfootnc
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    Default primer bulb question


    Does it matter if the primer bulb is in the horizontal or vertical position? I had a new one installed recently and afterward when the motor has run a few mins, it will drop RPMs slightly but quickly pick back up periodically. Thanks!
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  2. 02-23-2018, 08:45 PM #2
    1989loweprojon
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    Mine lays on it's side and flops around, I don't think it should matter.
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  3. 02-23-2018, 08:47 PM #3
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    Ralo79
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    Shouldn't matter, check your vent cap on tank


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  4. 02-23-2018, 09:11 PM #4
    Atimm693
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    They do prime better when vertical. Helps the outlet check ball stay seated.

    Shouldn't make any difference when running though, as long as the fuel line isn't kinked.

    The silver marine fuel line is really bad about falling apart on the inside. Will clog up the fuel system with clear plastic junk, even though the outside looks fine.
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  5. 02-23-2018, 09:31 PM #5
    TheGrandPoohBah
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    Quote Originally Posted by 1989loweprojon View Post
    Mine lays on it's side and flops around, I don't think it should matter.
    ...
    Last edited by CrappiePappy; 02-23-2018 at 09:36 PM. Reason: Uhh, nope ... inappropriate for this forum
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  6. 02-23-2018, 11:20 PM #6
    doggone
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    make sure the bulb got clamped tight on the tank side. It may be a real small air leak. If it was on the motor side it would leak gas when you pump it. Also just messing with the hose could have loosened something on the hose to tank fitting. Take off the cowling and pump up the bulb until it gets hard and look for a gas leak all the way to the inlet connection to the fuel pump and then from the fuel pump to the carb. If no gas leaking anywhere then check everything between the primer bulb to tank pickup. And as mentioned previously check that fuel line to make sure it's in good shape..

    a little air can cause the motor to run like a lawnmower running out of gas...ever heard that?
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  7. 02-24-2018, 06:54 AM #7
    ijerkum
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    VERTICAL! Believe me- I could write a book on why I say this. Go vertical....
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  8. 02-24-2018, 07:15 AM #8
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    Crestliner08
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    Quote Originally Posted by ijerkum View Post
    VERTICAL! Believe me- I could write a book on why I say this. Go vertical....
    In 50 years of boating, I've always had the bulb laying horizontally, with never an issue.
    "A voyage in search of knowledge need never abandon the spirit of adventure."
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  9. 02-24-2018, 07:52 AM #9
    Redge
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    Quote Originally Posted by Crestliner08 View Post
    In 50 years of boating, I've always had the bulb laying horizontally, with never an issue.
    Another 50 years to that total, horizontal.


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  10. 02-24-2018, 08:54 AM #10
    river scum
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    been threw a couple the last several years. they just dont seem to last like they used to. mine lays on the floor like most.
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