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Thread: SLT Primer

  1. #1

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    SLT Primer

    Has anyone tried to make an electric primer.
    The manual ones I've been using don't last very long, the last one didn't even make it one season. I was thinking about using a low pressure fuel pump and a push button switch.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Be VERY careful with electric anything and gasoline.

    What primer pump are you using that is failing so quickly?

    How many primer pump strokes do you need to do before the engine will start?

    Where are you connecting the primer into the fuel system? Fuel return line to the fuel tank, looped down low in the hull?

  3. #3

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    I'm using a standard pump type primer. I'm not sure what brand I've been buying them from SBT.

    I only have to pump it 3 or 4 times.

    I was thinking the ethanol in the gas maybe destroying the the internal oring, so I took one apart and the oring was damaged, unfortunately they are assembled by crimping the housing and after taken apart can't be put back together. At least I haven't been able to get a good seal after putting it back together.

    I have it connected into the fuel line between the tank and the fuel pump.

    I know that some omc outboards have used electric primers and was hoping to adapt one.

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Johnnynpr View Post
    I'm using a standard pump type primer... I've been buying them from SBT.

    ... I have it connected into the fuel line between the tank and the fuel pump...
    I would expect a decent quality fuel primer to last for several years.
    Edit: That said, I have not yet begun using my own PWC that have primers. Perhaps I will find otherwise.

    The preferred primer connection is to extend the main return fuel hose so it loops down low in the hull (between carb rack and fuel tank), then tee the primer into the return line at the lowest point. That way, there will always be fuel sitting in the main return fuel line for the primer to pump.

    This avoids the potential for a primer tee in the fuel supply hose to create a possible fuel flow restriction or allow air leaks into the fuel supply to the carbs. Sometimes the fuel supply hose can accumulate an air pocket while the PWC is sitting, which means there may not be much fuel for the primer to pump.

    Having the primer feeding from the fuel return line just seems to work better.

  5. #5
    Connecticut CrazyA's Avatar
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    Quote Originally Posted by Johnnynpr View Post
    The manual ones I've been using don't last very long, the last one didn't even make it one season.
    Quote Originally Posted by Johnnynpr View Post
    I'm using a standard pump type primer. I'm not sure what brand I've been buying them from SBT.
    Actually fairly common for this type of primer. I need to replace mine every season as well, of course, I'm in a climate where the ski is layed up for 6-7 months.

  6. #6

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    yep if you get a season out of them your doing good

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    Thanks for the info.
    I will re-plumb my primers and try a different source for new primers. Do you have any suggestions for a better quality primer?

  8. #8

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    i bought mine from atlanticjetsports ,i also run race fuel through mine so that can't help them either

  9. #9
    Connecticut CrazyA's Avatar
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    Quote Originally Posted by 785 lugs View Post
    yep if you get a season out of them your doing good
    Yup. That's what I really wanted to say....

  10. #10

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    Thank, I'm going to order a couple now.

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