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  1. #1

    MSX 110 Slow Going!!

    Hello fellow Polaris owners!! First I must declare I am a first time PWC owner and I don;t know much about watercrafts. My MSX 110 only pulls about 32MPH at full throttle. I read ina forum I shoudl easily be getting 50MPH from thsi machine with 1 rider. I have fresh plugs, oil, anti-freeze and 93 octane gas. Any ideas?


  2. #2
    Moderator beerdart's Avatar
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    Check Impeller clearance and pump bearings.

  3. #3

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    What rpm is it running? The ECU limits rpm to different levels when it senses different problems.
    If the computer senses too much boost pressure it will limit rpm to 4700-4800.
    Reverse limit is 3400
    Engine or exhaust manifold over heat: 1600-1800
    I have seen a few of these that have reduced power because oil level was allowed to get too high. (The oil level tends to rise in these engines. Especially if the engine is run in short cycles. For this reason polaris recommends filling oil tank to the "min" mark.) When oil is over filled it backs up though the breather and fouls the intake system. This can foul the boost control solonoid (causing overboost and resulting speed limit along with a trouble code). It can also foul the lamda sensor which will cause reduced performance with no trouble code.
    Start by checking basics (including compression) then check intake for oil. If oil is in intake the intercooler and plenum will need to be thoroughly cleaned. If rpm still limits around 4700-4800 you may need the boost control solonoid. If rpm is higher but much below 7400 at full throttle you may need a lamda sensor. This is stuff I have seen more than once. There is still the possibility of ignition coil, injector or sensor failure.

    Hope that helps

  4. #4
    Thanks a lot!! Its seems odd that a 2004 model with less than 30 hours would have these issues. Oil level looks fine. How fast should these run and at what RPM? I get about 32MPH at 5250 RPM.

  5. #5

    msx 2004

    Quote Originally Posted by Upnorth Fun View Post
    Thanks a lot!! Its seems odd that a 2004 model with less than 30 hours would have these issues. Oil level looks fine. How fast should these run and at what RPM? I get about 32MPH at 5250 RPM.
    hi mine had speed senser replaced 10hours 3 seats did not seal .2 front hoods where the gauges are broke at the front ok know after 40 hour ok has 97 hours going good flat battery at 50 ref reg went 3rd battery .getting shims tool hope in the works .in australia at ipswich

  6. #6
    Connecticut CrazyA's Avatar
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    Could be a boost leak as well, no? Maybe lack of boost resulting in the lower rpm?


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