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  1. #1

    msx 140 doesn't start

    Hello, I'm new in the world of jet because I just get a polaris msx 140.

    It does not start. The battery starts the engine and spark plugs are sparking, but I do not know how to control the circuit of gasoline, or whether the pump works.

    It was 180 hours and has cost a lot of money to his former owner (1800 to € -2,000 each revision, more than at Porsche!)

    I see no error code on the dashboard (unless there is a manip to display?)

    I'm not too familiar with the technical vocabulary jet. Can someone tell me they are the steps to see a stream and more particularly the circuit gasoline on this model?

    Thank you in advance
    Diamond


  2. #2
    boomanch1967's Avatar
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    Smile try this...

    First locate connector on fuel pump, ground brown wire, you should hear the pump run. Also check fuse, right side in front of battery is a Packard fuse holder, check fuse to pump.
    If pump runs then you need to check fuel pressure. Get a pressure tester from auto parts store. Should be over 20 at crank and running. If you have no fuel pressure, your regulator is laying in your fuel pump basket. There is a fix on here, did it this weekend, works like a charm... After looking at the design of the MSX fuel pump, they will all crap out eventually. If you find no fuel pressure, bounce me on here, and I will tell you an easy way to get the pump out.

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome to the Hulk, Diamond

    Is your MSX 140 a 2003 or 2004 model?

    You say the start button causes the engine to crank, but the engine does not actually start - correct?

    Safety lanyard is in position on the handlebar - correct?

    Measure the voltage on the White/Red wires. Do not unplug any of the fuel injectors, just find a place to connect your multi-meter to White/Red wire, and to electrical ground (engine block or battery negative post). DC volts on White/Red wire should jump to over 20 volts when the engine is cranking, and jump again to over 40 volts when engine starts.

    Leave meter connected, remove the flame arrestor cover, and prime the engine air intakes with a small amount of fuel down each throttle body. Does it start now?

    Also check fuel pressure at schrader valve tee in fuel return hose. Fuel pressure should be over 20PSI as soon as the engine begins cranking.

    Polaris Ficht Fuel Injected Engines

  4. #4
    Many thanks for that quick support.

    I'll test that as soon as possible. (I don't know where is the brown wire but I'll search)

    I'm not absolutely sure for that but i think It's a 2004 model.

    I remember the past owner could start the engine few seconds with a small amount of fuel in air intakes.

    I can't hear the pump, and I'll check the fuse this evening!

  5. #5
    so, I checked the fuses and they are ok.

    But I can't hear any sound of pump when I put the safety lanyard on the handlebar...

    Do I have to put the brown wire on ground before to hear the pump ?

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by diamond View Post
    ...Do I have to put the brown wire on ground before to hear the pump ?
    Yes.

    Do the other tests first;
    White/Red voltage checks
    Prime engine intakes with fuel
    Fuel pump pressure

    Grounding the Brown wire at the fuel pump should cause the fuel pump to run.

  7. #7
    fuse is ok but grounding the Brown wire at the fuel pump doesn't cause the fuel pump to run...

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by diamond View Post
    fuse is ok but grounding the Brown wire at the fuel pump doesn't cause the fuel pump to run...
    Do you have 12 volts on the Red/???? wire at the fuel pump?

    If yes, then the fuel pump has a problem.

  9. #9
    Fuel pump seems to be dead, what can I do? It can be repeared or Must be changed?Where can I buy a new one?

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by diamond View Post
    Fuel pump seems to be dead, what can I do? It can be repeared or Must be changed?Where can I buy a new one?
    Polaris PWC Parts Sources

    All Polaris Ficht fuel pumps are the same, from any year fuel injected Genesis, Virage, or MSX 140.

    More info here.

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