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  1. #1
    Kosh's Avatar
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    An Interesting MSX150

    Check out my newest toy It is destined for a Rotax 215 upgrade. I think I will call it a MSX215 if that has not already been taken (not very original I know)

    That is not the interesting thing at the moment though, I have just received it purchased sight unseen and there are a few surprises, This is a 35 hour machine with no compression. The serial number ends in F304

    I will let the pictures tell the story maybe some MSX140 owners can chip in and let me know what is similar?

    There may be more surprises when I do some dismantling
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    Last edited by Kosh; 03-27-2010 at 05:19 AM. Reason: Spelling


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    I see an empty 2-stroke oil tank in there.

    What is it about this MSX 150 that is 'interesting'?

    An F304 build date would be June 2003, which would be really early/beginning of 2004 model year watercraft production for Polaris.
    Last edited by K447; 06-15-2010 at 10:46 AM. Reason: Corrected build year comments

  3. #3
    Kosh's Avatar
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    Just sharing,Interesting for me.

    The rub rail has a join on both sides not one as normal on the rear. (not as nice)
    Not pictured, windscreen is thicker and and slightly differently shaped
    Test point for fuel pressure on the fuel rail fitting
    MSX 2 stroke tank
    The reverse lever operating assembly is completely different (detentes)and has a mechanical micro switch (not magnetic)
    No breather hole in cyclone
    Ride plate has welds where it angles up (may have been modified)
    There has been some sanding to sharpen up the transition of the hull step (is this a tuning mod?)
    Adjustable seat post
    Rubber block on front of seat
    Fuel lines routing and filter location

    Granted there are not an abundant amount of these in Aus and I have only closely inspected on 4 others but it is different to what is in the standard parts breakdown.
    There may be more once I spend more time with it.

    Cheers
    Last edited by Kosh; 08-21-2010 at 07:28 PM.

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Kosh View Post
    ...
    The rub rail has a join on both sides not one as normal on the rear. (not as nice)
    Not pictured, windscreen is thicker and and slightly differently shaped
    There were two thicknesses made, the thinner sunshield seems more fragile

    The reverse lever operating assembly is completely different (detentes)and has a mechanical micro switch (not magnetic)
    My 2002 Virage reverse is the same

    Ride plate has welds where it angles up (may have been modified)
    If you get the chance, check the part number (top side of the plate, right under the jet pump)

    There has been some sanding to sharpen up the transition of the hull step (is this a tuning mod?)
    Adjustable seat post
    Rubber block on front of seat
    That shows up on the 2003 parts list for the seat;
    Item 7 -5521659 Bumper, Seat

    Fuel lines routing and filter location ...
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  5. #5
    Kosh's Avatar
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    Thanks for the info K, I am becoming more enlightened. I have never seen inside another model Polaris in the flesh.
    I will check the ride plate when the sun comes up. Hope it is an 04 plate. I am guessing this one may have been completed out of left over parts?

    Thankyou

    The ride plate has 03 numbers on it. I checked the angle against my 04 and it is the same, I guess it was upgraded at the point of manufacture?

    Checking out the MSX140 parts listing has answered most of my questions. It looks like it was destined to be a MSX140 there are a couple of drilled rivets left behind forward of the battery storage where I'm guessing a bracket has been removed. The fuel filter mounting bracket right hand side of tank was never fitted.
    Last edited by Kosh; 03-29-2010 at 01:01 AM. Reason: Sun came up

  6. #6
    ph2ocraft's Avatar
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    Any more on this project??

  7. #7
    Kosh's Avatar
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    Work still in progress, I am waiting for the donor engine to arrive, it was late to ship and still on the water at the moment.

    I have been keeping busy repairing the removed weber engine (nikasil failure) it will be at a Desperado stage 2 tune (higher flow compressor wheel) ECU remap etc. I will keep this for my standard MSX150 (stage 1)

    I will do updates when I have done something interesting but more than likely I will be asking all of you more experienced guys for guidance.

    Cheers

  8. #8
    I'm feeling naturally aspirated today pirate33's Avatar
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    Man that looks like a '03

    was the ride plate done so the pump can be removed without removing the ride plate as a '04?

    '03's had the rub rail joint on the side but caused water to spray onto the rider and was changed for '04 to the nose a back

    The sponsons are the uncut '03s that caused the disqualification for the winner of the Havasu 300 for being too long in height

    I guess with that gas tank set-up you lost @ gal extra fuel the 110/150 tank would hold

  9. #9
    Kosh's Avatar
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    Not sure what the 03 plate is like but I was able to remove the pump with out removing the ride plate. The sponsons look like the ones on my 04 what do I need to check to confirm what these are.

    I will need to do some reaserch and find out what to measure to confim the hull year, any sugestions?

    Cheers

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Kosh View Post
    ...There has been some sanding to sharpen up the transition of the hull step (is this a tuning mod?) ...
    Creating very sharp transitions from the hull bottom to the vertical face at the transom and the hull step is a hull tuner's thing.

    The idea is to reduce the drag from the rear edge as the water releases from the hull edge.

    It is unclear to me whether this actually makes much of a difference. Some tuners do it, others do not.

    I suspect that other hull work pays bigger dividends. Things like truing the hull bottom, making sure all transitions between hull and jet pump are smooth and edge free.

    And making sure the pump sealing to the hull is perfect.

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