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  1. #1

    compression check

    New member and owner.I have a 04 Freedom 700,two cyl.,carb. What is the preferred method of testing.And what should the numbers be. I'll tackle the NO SPARK problem later if comp. is good.


  2. #2

    Join Date
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    first off see what your battery reads while cranking , the on board display is no good for this ,

    if you keep 12+ volts go to the tech section , under domestic elec there should be a twin stator testing in there ,

    plus we love pics ,


    welcome to the forum

  3. #3
    casey67's Avatar
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    Welcome to Green hulk. Get a compression guage,any auto parts store will have one.Polaris doesn't specify an exact #. You should have around 120 psi. As long as both cylinders are within 10% it should be fine.
    Make sure you have both spark plugs removed. Hold throttle wide open when cranking the engine over.

  4. #4
    ph2ocraft's Avatar
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    Hi kevan, WELCOME to the Green Hulk Forums!!!

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    welcome to the Hulk.

  6. #6
    Water Bum Rodneyae's Avatar
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    Welcome to the HULK. Make sure your battery is charged. Remove all the plugs. Use a screw in type compression tester, crank it over and open the throttle all the way. And that is about it.

  7. #7
    axgrider73's Avatar
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    Welcome Kevan!!

    Let us know how it goes.

  8. #8
    The compression is low, about 75psi on both.I've read of many just honing the cyl. and new rings. Would it be better to have the cyl. bored .005 or .010 over with new pistons.

  9. #9
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    Kevan, Did you check psi w/ throttle plates wide open? How many hrs on the ski? Was the engine spinning quickly while testing? That ski seems too new to have that low of compression.

  10. #10
    Water Bum Rodneyae's Avatar
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    Another trick to try.. Pour about a teaspoon of oil down the spark plug holes. Crank it over and try again. I have seen where fuel will wash the oil off of the cyclinder walls wich will make the compression readings low. Whats going on with the ski? Will it not start?

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