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Thread: sled question

  1. #1
    Senior Member _daynzy's Avatar
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    Default sled question

    I know it's august, but...
    I had posted this before, but never found out anything so I'll post it again.


    problem with my 97' polaris indy 440 l/c


    At the start of last winter it ran great for about 3 weeks, than as it would warm up it would bog out and not move an inch. Two seconds later, back to flying thru the field. Four seconds after that, back to bogging down and wouldnt move. It's at the point now where you get on the throttle and you have nothing any more. Compression is great in both cylinders, all new fuel lines, filters, carbs cleaned, new gas, new plugs, new plug boots. Chokes are fine, not sticking.

    Took it to our local polaris dealer last winter, it ran great for the guy on his 30 minute test (so he says anyways). I say great and take it out to camp. Get to camp, fire it up... Dead. Bogging out like it did. Almost cut holes around the sled and let it sink to the bottom of the lake.


    So anyone have any suggestions? Stator? Carbs aren't jetted right?


    Anyone know someone who works on these on the side?

  2. #2
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    Default Re: sled question

    Did you clean the carbs correctly? Here is a how to link http://www.ripperd.com/ftp/admins/carb_rebuild/ is the tank vent line clear and not pinched?

  3. #3
    Senior Member DM46's Avatar
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    Default Re: sled question

    Change the fuel pump and your problem should be fixed provided that your crank seals are good.
    It's a Ford thing, you wouldn't understand.

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    Default Re: sled question

    To check the crank seals you can do a simple test.
    The clutch side of the engine is the suspect seal, so with the engine running, spray where the crank exits the block with WD 40.
    If the engine rpms increase, the seal is puched.
    WD 40 is combustible, it will actually help sometimes to start a troubled engine.
    Propane will also do this same job.
    The seal is there to create a negative pressure(vacuum), that makes the engine suck.
    If it can't suck in the fuel it needs, it will start, but have no power.
    Cold it is not as evident as when the engine is warm.
    The added air in that cylinder creates a lean condition and will most definitely cause a bigger problem if you don't address it ASAP.(blown piston)
    If there is no change in rpm, than DM46 could be right about the pump.
    You should be able to do this without investing anymore money.
    Sometime, it's just a process of elimination.
    Last edited by Jack Butler; 09-08-2009 at 04:47 PM.

  5. #5
    Senior Member _daynzy's Avatar
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    Default Re: sled question

    thanks for the responses, will post wht happens

  6. #6
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    Default Re: sled question

    Without a question it could be your coil. This happened to my sled and my father in laws. It mimicks a fuel problem & a ring problem but its not. If it was a seal, your rings would have burned by now, since you have proper compression, its NOT your seals.

    trust me, been there done that.

    Check your coil.

  7. #7
    Senior Member DM46's Avatar
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    Default Re: sled question

    If it was the coil it most likely wouldn't run at all. But on a second note, If it is the fuel pump as I suggested don't run anything but a Mikuni. Let me know if you need one I believe I have a couple.
    It's a Ford thing, you wouldn't understand.

  8. #8
    Senior Member _daynzy's Avatar
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    Default Re: sled question

    I'll buy one of those off you DM. PM me with what you want for it.


    Also gonna change the coil too.


    Thanks

  9. #9
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    Default Re: sled question

    Quote Originally Posted by DM46 View Post
    If it was the coil it most likely wouldn't run at all. But on a second note, If it is the fuel pump as I suggested don't run anything but a Mikuni. Let me know if you need one I believe I have a couple.

    No not at all. If the coil starts going it will run when its cold at 1st, then when the coil heats up its shuts down and wont start or may start briefly. As soon as it cools down again it will start and repeat the same process....so your wrong on that one bud.

    Save your money......CHECK THE COIL.

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    Default Re: sled question

    Ignition problems can be a hair puller for the reasons X has stated.
    It sounds like he was going to include the coil in his diagnosis, so.....
    ....not sure who the "your wrong on that one bud" is for X, you or him?

  11. #11
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    Default Re: sled question

    Quote Originally Posted by JackButler View Post
    Ignition problems can be a hair puller for the reasons X has stated.
    It sounds like he was going to include the coil in his diagnosis, so.....
    ....not sure who the "your wrong on that one bud" is for X, you or him?
    DM46 said he would have no spark if it was the coil, also said it wouldnt start period...thats entirely incorrect.

  12. #12
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    Default Re: sled question

    Pm for yah ADD

  13. #13
    Senior Member DM46's Avatar
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    Default Re: sled question

    Yes, your point was true, but it will only do that for so long and then the coil will just burn out completely. It doesnt take long for it to happen either, By the sounds of things he has had more than enough riding in on it to finish the coil. Im not saying it's not the coil, however I build about 10 of these sleds every winter and am quite familiar with the problems on Polaris Indy's.
    It's a Ford thing, you wouldn't understand.

  14. #14
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    Default Re: sled question

    Quote Originally Posted by DM46 View Post
    Im not saying it's not the coil, however I build about 10 of these sleds every winter and am quite familiar with the problems on Polaris Indy's.

    +1!!

  15. #15
    Senior Member _daynzy's Avatar
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    Default Re: sled question

    You can completely cover the left side carb with the palm of your hand, and it doesn't change the idle at all.. you cover the right side, snuffs it out.


    Changed the carbs from left to right, still the left one doesn't do anything when you cover the air instake side.


    I'm assuming that's the problem. Any ideas??


    (changed cdi, and rebuilt the fuel pump)

  16. #16
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    Default Re: sled question

    Is the left plug wet?
    If it's dry, that's telling you, you have no fuel going to the left carb or at least no fuel leaving the carb.
    If it's wet than it should be the coil.
    If it's dry, spray fuel into the left crab at idle and see what happens.
    Than, plug the right carb as you spray fuel into the right, see what happens.
    Propane will work as a replacement for gas for testing purposes.
    If plug is wet, test/replace the coil.

  17. #17
    Senior Member _daynzy's Avatar
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    Default Re: sled question

    changed the coil already.. it's a coil/cdi combo


    ill test what you said out tommorow afetr work

  18. #18
    Senior Member _daynzy's Avatar
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    Default Re: sled question

    i sprayed some wd40 around the crank seal, the rpm jumped the first time i tried.. did it again 10 minutes later, and it wouldn't jump anymore.. the engine still bogs out, but wont increase rpm with spraying wd40


    soooo could it be my crank seal?? shouldnt it leak everytime i spray wd40 on it??

  19. #19
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    Default Re: sled question

    Is the plug wet or dry on that cylinder?
    What happened when you sprayed in the carb?

  20. #20
    Senior Member DM46's Avatar
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    Default Re: sled question

    What are you running for spark plugs?
    It's a Ford thing, you wouldn't understand.

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