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Polaris msx 140 top end kit from sbt

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  • Polaris msx 140 top end kit from sbt

    Mag piston gone got topend kit from sbt ran fine for 2 hours found out my fuel regulator was at bottom of tank mag piston gone again fixed problem and replaced mag piston from sbt 26 psi on fuel ran 12 hours this summer was happy then lost center piston will have to hone and replace another piston from sbt can anybody help me with this problem top of pistons are chipping sbt coatings on intake side please help

  • #2
    Re: Polaris msx 140 top end kit from sbt

    You may have an issue with a fuel injector leaking down or holding open, the hard part is finding some one that can test it properly.
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

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    • #3
      Re: Polaris msx 140 top end kit from sbt

      In the past, a few customers have contacted us because their 4-Stroke Sea-Doo is mysteriously consuming engine coolant. We have found that the two hoses inside the hull that are connected to the ride plate/heat exchanger are the hoses that are leaking. The hose clamps that are used will rust and break and when pressure is built up from the cooling system. The antifreeze will then push past the ride plate nipples and hoses. No evidence of coolant can be found in the hull because it is bilged out by the self-bailing system in the ski. Attached are a few pictures of a failing clamps and its location. Replace the clamps with a good marine grade full stainless steel clamp. This should help prevent "mysterious" coolant loss
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      • #4
        Re: Polaris msx 140 top end kit from sbt

        Yes this is a known issue with any of the 4 stroke sea-doos that use the squeez type clamps on the cooling hoses to the ride plate. Most of the sea-doo jet boats dont even use that style clamp, they use the screw style and there is no issues with them rusting.
        SBT Tech Support is here to help with your problems.
        We try to answer each question quickly and accurately.
        Please do not use Private Messaging for Tech Support, use the forums.

        Comment

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