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  1. Replies
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    Yeah... I've found plastic gear bits all...

    Yeah... I've found plastic gear bits all through-out the engine I rebuilt that had that failure too. Heavy in the sump corners and in the filter too.

    Sorry to see your plating failure. Seems all...
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    Oil lines: pump to oil injection nipples: 3mm...

    Oil lines:
    pump to oil injection nipples: 3mm ID x 7mm OD... but 1/8 inch hose works and is easier to find (not as thick walled)
    tank to pump: 1/4 inch
    -- ensure it's oil rated tubing/hose.
    ...
  3. All these years of folks saying "only use the OEM...

    All these years of folks saying "only use the OEM Mikuni carb rebuild kits" has always caused an itch to me as well. I've always wanted to know exactly why.

    AL_Mark... I applaud your efforts to...
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    Are you asking about the rebuilding the...

    Are you asking about the rebuilding the turbocharger? Or the engine?
    Regarding the engine. I second Hiperco's comment. If you don't overheat them or have nikasil plating issues... they are very...
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    951

    I don't recall anyone ever discussing fixing or...

    I don't recall anyone ever discussing fixing or dissecting an SIFB module. As you know, they are pretty entombed in epoxy and not easy to get at. There was a guy who created an aftermarket version...
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    951

    Welcome to the Weber-MSX club! The MPE750...

    Welcome to the Weber-MSX club!

    The MPE750 Weber engine is dry sump with sorta small oil capacity (~2.5-3 qts per oil change). And being a turbo engine, it's hard on the oil... thus the 20 hr oil...
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    Nice spacious work space! I agree with...

    Nice spacious work space!




    I agree with Mike... stick with stock temp thermostats. Heck, I'd just test the ones you got in a pot and confirm they open/close when they should... and if they...
  8. Only physical adjustment available is on the...

    Only physical adjustment available is on the cable that goes from the throttle finger trigger to the PPU (inside hull above fuel tank below steering).
    I believe the adjustments are made on the PPU...
  9. Yes, you can get to the heat exchanger with the...

    Yes, you can get to the heat exchanger with the engine in place. You do have to remove the intake manifold which is the top half of the mount for the heat exchanger.
    You may be able to get to the...
  10. High revs when running on the trailer...

    High revs when running on the trailer (out-of-water) is common. Always start with reverse engaged to limit rpms to 3400. It should quickly settle down to 1500-1550 rpms by itself. If you blimp the...
  11. I'm just curious. Did you swap back in the "bad"...

    I'm just curious. Did you swap back in the "bad" ecu... after confirming the engine ran fine with the "good" ecu? Did it run bad again?

    ECUs can be reflashed... I've never known one to be...
  12. Replies
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    Every injector I've ever seen did have that piece...

    Every injector I've ever seen did have that piece attached to the end of the injector. But... I'm not certain its purpose. Perhaps someone else can chime in.

    Cheers!...
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    Ah...gotcha. Forgot there were 2 skis under the...

    Ah...gotcha. Forgot there were 2 skis under the knife. I've used sleeved blocks from Randy on 2 of my rebuilds. They work great, no issues here.

    Cheers!
  14. Replies
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    WOW! You definitely win the most destroyed...

    WOW! You definitely win the most destroyed waterpump gear award!



    When re-installing, I fully assemble front (minus intercooler) and rear (minus oil/coolant tanks) of the engine... leaving...
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    Well done! Welcome to the club! Yeah... first...

    Well done! Welcome to the club!

    Yeah... first time engine removals are aggravated by the factory paint in the bolt holes for sure! At least you know for certain it was never messed with prior.
    ...
  16. Replies
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    PM sent here on GH. Cheers!

    PM sent here on GH.

    Cheers!
  17. Replies
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    Awesome ingenuity! I wonder how that will...

    Awesome ingenuity!
    I wonder how that will work... or rather why Polaris when they went metal gears choose a higher tooth count gear. (noise?)...
  18. Replies
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    From the service manual The idea was for...

    From the service manual



    The idea was for safety for an unskilled operator... who during a "panic stop" situation let off the throttle and then lost all steering ability.
    I've only ever...
  19. Replies
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    If you're doing a rebuild and plan to keep the...

    If you're doing a rebuild and plan to keep the ski... I'd say the waterpump plastic gear upgrade is worth it. If you can find the new plastic version (one withOUT all the tiny holes in it)... it's a...
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    Plating failures in the MSX Weber engines were a...

    Plating failures in the MSX Weber engines were a manufacturing issue, not the plating itself. The problem was fixed and Weber made many more engines (FST snowmobiles) for years that never had...
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    Yeah... ouch. Does sound like it could be...

    Yeah... ouch. Does sound like it could be nikasil plating failure. Low compression... oil turns black fast (poor ring sealing).

    Get a borescope and have a look at your cylinders.

    Cheers!
  22. Replies
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    Those pics look normal. Oil residue in the...

    Those pics look normal. Oil residue in the hose/hardpipe is normal.

    Did you get your fingers on the turbo shaft? How's it spin?

    Cheers!
  23. Replies
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    I don't think you want a tapered end. A tapered...

    I don't think you want a tapered end. A tapered rod and a tapered coupler will not show alignment accurately. Seems like as you'd push the rod into the coupler it would self center and force...
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    The alignment coupler tool has an opening to...

    The alignment coupler tool has an opening to snuggly fit the tapered smaller end of the alignment rod.
    Most of us use the old Polaris solid metal couplers (found in most pre '96) which while...
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    Are you detecting any frothing or moisture in the...

    Are you detecting any frothing or moisture in the oil? A leaking oil tank can allow water into the oil which will milkshake it and expand its volume... and ends up puking out the cyclone vent hole...
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