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Thread: Help Please

  1. #1

    Help Please

    ok so im running out of ideas here and need some more info. i have a 1997 Polaris Hurricane 700. i bought it about 5 6 yrs ago from a guy who bought it new but let it sit for awhile. so i spent about $600 to have the carbs rebuilt. and have been running it since however the ski never performed up to snuff. and here is where i am now, it has about 93hrs on it with about 125 - 130 psi in each cylinder. the carbs look clean pop offs work well. always run premium fuel new plugs clean filters all the stupid stuff you can think of. my problem is though terrible bog in the bottom, loads up terrible. when going from cruise to idle you start at about 1800 1900rpm and go down from there to about 1000rpm then when coming back out BOG! the other funny thing is when idling if you lean to the left instant almost die bog. runs great on top and when boat is flat start doing twisties and pretty much dies. 90% of the work done was by a certified polaris tech. oh, one other thing checked the reads they looked ok, not perfect flat but not broken. my tech had a brand new set of reeds from a 600HO sled that were identicle to the ones from my hurricane, tried that not alot of difference. so any help would be great. i have been fighting this for years and im done! i want to fix this beauty


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    I know you said the carbs were rebuilt by a Polaris Tech, but everything you describe sounds carb related.

    Thermostat/popoff leak
    Carb needles damaged or misadjusted
    Needle seat damaged
    Choke nor open
    Fouled spark plugs
    Fuel pump diaphragm damaged
    Carb sync incorrect
    Needle/seat control arm too high or sticking
    Collapsed exhaust hose or pipe (restricted)
    air intake restricted
    Broken, cracked, or poor seating reeds
    low compression
    Ign problem
    Antisiphon valve worn or broken.



    So I guess you need to check the carb adj first.

  3. #3
    re adjusted the pop off valves and that helped, runs much better but still not perfect. going to get new plugs and see what happens.

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    What spark plugs are you using?

  5. #5
    NGK BPR7ES just bought new ones

  6. #6
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    The manual states you should be running the BPR8ES plugs.

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    I agree that it sounds carburetor related, but this engine may still have the original ignition system in it. So don't completely rule out ignition issues.

    Check the basics;
    Ignition coil ohms, spark plug leads, corrosion in the electrical box, etc.

  8. #8
    Watcon's Avatar
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    #1 You could be missing the small black plastic piece that covers the low speed circuits inside the carb.. (look at the diagram) its apprx 1/2" long and has an "s" shape to it.. I am assuming these are OEM Keihin carbs?

    #2 You could have lost (or damaged) the small plastic "check valve" that fits above the main jet. If they are bent or creased it will flood out with fuel.. Keihin or Mikuni.

    #3 The turbocharger heim bolt is loose..

    Regards,
    Randy

  9. #9
    the funny looking piece in the carbs is there. and im pretty sure they are oem CDK2 carbs. i hope to get it back on the water monday otherwise it might be next year with the way the weather is going

  10. #10
    20 feet Boy's Avatar
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    bpr7es are a hotter plug I ran them on my old spx. Because the lake was 4700 ft that i rode on. The 8 smoke and loaded up allot.

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