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  1. #1

    2003 MSX 140 bogs with throttle, TPS sourcing?

    Do you have any tps for 2003 140 msx?
    Last edited by K447; 01-15-2021 at 11:45 PM.


  2. #2
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by Jacen View Post
    Do you have any TPS for 2003 140 MSX?
    Apparently nobody does anymore.
    The last of mine were sold a year or two ago.

    There is a workaround by retrofitting a non-pigtail (available from non-Polaris sources) TPS equivalent. Tricky part is modifying the throttle body to mount the older style TPS.

    Or buying a non-pigtail throttle body set from a pre-2003 Polaris Ficht engine. Which will mount the non-pigtail TPS

    http://polarispwcknowledge.shorturl....t-things-to-do

  3. #3
    Po owner says idles fine Boggs when giving throttle could it be the regulator both skis doing same thing one has 58.3 he and the other has 60.4 hr

  4. #4
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by Jacen View Post
    Previous owner says it idles fine, bogs when giving throttle. could it be the regulator?
    both skis doing same thing.
    one has 58.3 he and the other has 60.4 hr
    Hours do not matter much on a twenty year old watercraft.

    Current condition and potential repair difficulty and repair costs matter more.

    There are several common problems with Polaris Ficht engines.

    The EMM could need repair, even though the engine starts and idles. If it needs fuel priming before it will start, that is a clear indication that EMM repair is likely.

    The fuel pump pressure regulator will need reinforcing, unless that has already been done. Not a deferrable repair in my opinion, consider it mandatory on all Polaris Ficht models. Even if the fuel pressure measures correct right now.

    Low fuel pressure typically will not prevent the engine from free revving on the trailer. But low fuel pressure does risk engine damage if it is run hard in the water.

    Incorrect ‘substitute’ spark plugs can cause all sorts of weird problems. Make sure the correct NGK FZR6H spark plugs are installed.

    More info can be found at this link.
    http://polarispwcknowledge.shorturl....t-things-to-do

  5. #5
    Is it worth buying the pair at 3000 with trailer

  6. #6
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by Jacen View Post
    Is it worth buying the pair at 3000 with trailer
    How much money are you willing to spend getting them into reliable and good running condition?

    Assume each needs EMM repair.
    Plus the fuel pump regulator reinforcements.

    All the original rubber seals are potentially age hardened. The engine has crank seals front and rear. Ficht engines are less sensitive to minor crank seal leaks, but still need the seals to work.

    Rebuild the through-hull assemblies as the MSX has steel bearings inside.

    Rubber hoses, especially the fuel hoses, may be age hardened. The fuel injector fittings are plastic and probably brittle. Also unavailable new. Be careful with them.

    ‘And so on through the entire machine. Assume everything needs to at least be inspected, lubricated. And possible serviced/fixed/upgraded.

  7. #7
    Thank you for the advice just looking to pick up a couple for the kids to play on that will be somewhat reliable and parts available

  8. #8
    Thank you for the advice just looking for two skis for the kids to play on somewhat reliable and parts available for repairs

  9. #9
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by Jacen View Post
    ...somewhat reliable and parts available for repairs
    You probably should be looking at 4-stroke engines from a brand that is still making PWC. My own preference is Yamaha.

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