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  1. #1

    99 polaris slth red engine pulse line from crankcase

    I was wondering if there is a way to improve how the fuel pump works. I guess it gets pressure from the crankcase to pull the fuel through the system. The machine seems to be always starved for fuel when starting. When the motor is warm it is likely to fire up a little better. Maybe after it has built up a little pressure from just running.
    Is the only fix adding a primer?
    Otherwise when running it is a good unit. It will bog a little if you just putt around at idle, but other than that it goes darn good.
    If were in a group mine is always the last to fire up.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    My guess is that you have multiple little issues that add up to hard starting. Hard starting when warm is a clear signal that something (or several things) are not quite right.

    A well maintained Polaris engine will start promptly when warm, and even when cold should start in a few cranks.

    Has Service Bulletin PWC-00-05 been applied to this electrical box? There is a wiring change directly related to the CDI not wanting to start shortly after engine shutdown. It is fairly easy to make the change and documented in my signature links.

    Maintenance is key to these fuel systems. You need everything to be air tight all the way from fuel tank to fuel pump. Air leaks allow bubbles to get sucked into the fuel hoses which of course don't help the engine run.

    Maintainence of the caburetor, fuel selector valve, and fuel pump. Have these be rebuilt, ever?

  3. #3
    Thanks for the reply. I have done the service bulliten for hard start with the jumper wire. And the only thing with the fuel system that i have not done is take out the fuel sending unit from the tank. Is there a filter inside of the gas tank on the fuel pick up????? Carbs have been rebuilt, replaced the fuel selector, The fuel pump for this model is on the carb. One thing I read after rebuilding the carbs was that it is recomended to use factory rebuild kits. I used the ones off of e-bay.
    Meyers was the name. Would the fuel pump gasket and diaphram be that differant?

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    OEM rebuild kits are recommended. I can not comment on the Meyers brand rebuild kits as I am not familiar with them.

  5. #5
    Who sellls the OEM carb kits.
    Thank you

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by 250super View Post
    Who sellls the OEM carb kits.
    Thank you
    John Zigler, Watcon.con

  7. #7
    Tony's Avatar
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    What is your pop off pressure?

  8. #8
    they are set at about 19 to 20 psi. that should be right on.

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