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Thread: MFD hour meter

  1. #1

    MFD hour meter

    I just bought a used 94 750SL. I was suprised to see the MFD worked when I hooked a battery. The ski is very clean and the hour meter shows 39 Hours. This ski sat in the guys garage since 2000! He was the original owner and bought it in 94. It seems odd that he would have only put 40 hours on it. How accurate are the MFD's for hours? It sat in his garage with no battery connected. Does this seem right?


  2. #2
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    Very Likely,true hours.I've never heard of them being off. But sometimes some models have been known to reset when changing a battery or jumping.

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Sometimes these MFDs do seem to get reset engine hours, but nobody seems to know how to do so on purpose.

    Your example either has 39 hours since new, or 39 hours since the MFD last reset itself.

    Base your evaluation not on the hour meter, but on the mechanical condition of the machine.

  4. #4
    ph2ocraft's Avatar
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    Exactly.
    How about some photo's of the pump and intake area?
    The interior of the hull and engine.

  5. #5

    Pictures of 750SL

    Here are the pictures. The guy said the pump was bad and removed from the ski. Pictures show the bearings are seized. I have the same exact ski and had my pump rebuilt last year. I only got 5 rides on that rebuilt pump before my motor blew! I'm taking my pump off and putting it on this ski. I've run some new fuel lines and am waiting on my tirple outlet fuel pump.
    Compression : Front 130 PSI, Middle 122, Rear 124

    Have not started the ski. I took my carbs off my blown motor yesterday. I'm going to rebuild them and put them on this ski. Upgrading the fuel system and trying to check ALL the stuff so I don't blow this motor too!
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  6. #6

    Pictures

    Some more
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  7. #7

    Haul

    Haul
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    Click image for larger version. 

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  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Pictures from the future!

  9. #9
    ph2ocraft's Avatar
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    It looks clean but I'll bet it's well more than 40 hours.
    I see a re-sealed shoe, extremely rare for a low hour machine.
    Drive line bearing failure at 40 hours?
    The average owner puts about 30 hours on his boat in a year.

  10. #10
    Do you think I need to reseal the shoe again? I'll search for any threads related to this. Anyone got links for this procedure?

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