polaris xplorer 300 2 stroke wont start

Discussion in 'Other' started by Conner Jones, Nov 15, 2019.

  1. Conner Jones

    Conner Jones Member

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    There is almost no suction from the back of the carb. It has 105 compression tho, and it literally ran amazing before. It was only sitting for 1 week. This thing has sat for 3 months before and started up no problem.i dont know what happened. I did lose the woodruff key when i took the flywheel off, so i went and bought another one and put it on there. Maybe that has something to do with it. Could i have done something wrong or bought the wrong one? I just bought a generic key from a local store
     
  2. Conner Jones

    Conner Jones Member

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    There is almost no suction from the back of the carb. It has 105 compression tho, and it literally ran amazing before. It was only sitting for 1 week. This thing has sat for 3 months before and started up no problem.i dont know what happened. I did lose the woodruff key when i took the flywheel off, so i went and bought another one and put it on there. Maybe that has something to do with it. Could i have done something wrong or bought the wrong one? I just bought a generic key from a local store
     
  3. Slydog

    Slydog Member

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    How well did this generic key fit in the crank?loose?tight ?stick up high enough?or to high.in which case flywheel on a tapered shaft is bad.right key is .alot of flywheels have spun on shafts for that reason.and not tourqeing correctly.you said it runs with a fuel supliment?hardly no vacuum with hand over carb?no vacuum no sucky fuel
     
  4. Larry's Shee

    Larry's Shee Active Member

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    Did you have the carb off? When you cleaned the carb you removed the jets and could see daylight through ALL of them? Did you check/set float height? Did you blow compressed air into ALL passages? Did you do a leak down test after crank seals?
    Is the spark a nice fat blue color?

    Now let the flaming begin. It’s called starting fluid, not running fluid. Give it 1/2 second shot see what happens. Or figure out a way to dribble a little bit of pre-mix in carb.
     
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  5. Conner Jones

    Conner Jones Member

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    It was a little big so i grinding on it a bit until it fit good. Im not sure how high it is supposed to stick up, so I dont know if it is the right height or not. I dont know why there is no suction on the carb. I did clean everything in the carb and all the jets are clear and i set the float height parallel. I did not do a leak down test because replacing the crank seals made no difference so that was not the problem. I suppose i could do a leak down test if you guys think that it would help diagnose the problem. I thought air leaks made the engine rev super high though.
     
  6. Slydog

    Slydog Member

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    First off order correct key.you need to do a leakdown test especially when replacing seals.or doing a top end. Carb boot,ect..i think your vacuum is low because you either have an air leak or leaks.as of last post compression was still 105.you can't assume.you have to test.leakdown tester is a must if you have 2smokes.
     
  7. Slydog

    Slydog Member

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    Stop chasing a ghost
     
  8. Conner Jones

    Conner Jones Member

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    So I looked online and i cant find the woodruff key. Its not in the partzilla diagram. Can anybody inform me on what the part number is? Im also going to look into getting a leak tester.
     
    Last edited: Nov 20, 2019
  9. Slydog

    Slydog Member

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    Someone on here used to sell them.they were setup for blasters.or make one.there are topics here on it.not trying to give you a hard time but it's a very easy test , and a must have tool what year make and model is it.maybe we can help find a key
     
  10. Conner Jones

    Conner Jones Member

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    Im gonna make a leak tester. The model is a polaris xplorer 1998. I cannot find the key for the life of me.
     
  11. Slydog

    Slydog Member

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    If the keys cheap buy 2 incase you lose one:D
     
  12. Slydog

    Slydog Member

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    Found it babbitts polaris parts house.under crank and piston part num 3081543. $7.43 . .so you know it's out there if you want to shop around
     
  13. Conner Jones

    Conner Jones Member

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    Much appreciated
     
  14. Slydog

    Slydog Member

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    That's the going price.worth every penny instead of trashing flywheel or crank.while tou wait on that build and do leakdown test.
     

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