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  1. #1

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    Oiling supercharger on SHO?????

    I'm getting mixed messages re. oiling the SHO supercharger.

    Have read to undo the screw and top it up at 10 yours, but yesterday at our local boat show talking to the Yamaha tech. that did my 10 hour he said---NOT NEEDED---no need to open the screw and top up, as the oil in there is for start up only then the supercharger is oiled by engine pressure.
    He has done the Yamaha SHO tech. course here and these were his instructions.

    The only time it will require topping is if the supercharger is taken off the engine for whatever reason.

    Jerry, anybody else with sensible knowledge----comment please.
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  2. #2
    mitch ochoa's Avatar
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    Hi Gos. Go back to your dealer and ask if they have a copy of the SHO service manual. Then check for yourself the Maintenance Interval Chart on page 3-1. The maintenance procedure is for the supercharger impeller shaft ONLY. Not for the gears, etc. underneath the supercharger. So the amount of oil needed is very little(just a few squirts)

    Ask your Yamaha tech to explain what needs to be lubricated under the Supercharger item written down there that is also referenced on page 5-39.
    It's written on the chart that this lubricating service is done on the initial 10 hours and thereafter every 50 hours.

    Do this ONLY once you have the manual in hand and see what he has to say about it.

    Mitch

  3. #3

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    Thanks again Mitch.

    Does anybody here have this document please? Or is it 'findable' on the web?
    I can PM my email address if need be.

  4. #4
    mitch ochoa's Avatar
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    PM me your email. I'll send you scanned copies of the procedure plus the chart so you can print it out.

  5. #5
    Site Admin Green Hulk's Avatar
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    Mitch, can you post the scanned copies in .pdf format for us all to see?

    Thanks

  6. #6
    mitch ochoa's Avatar
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    As you can see, it also says to replace the bolt gasket everytime you lubricate the impeller shaft. I checked the online parts catalog at Jerry's site and couldn't find the gasket. It seems Yamaha made a publishing error in their SHO parts catalog.
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  7. #7
    KamikazeGPR's Avatar
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    It looks to me that the gasket(#2 in the service diagram) is # 7 on the parts finder

  8. #8
    KamikazeGPR's Avatar
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    They call it a washer in the parts finder. Is it rubber and doubles as a gasket as well by compression? Seems to be the only bolt that has a washer(gasket)

  9. #9
    mitch ochoa's Avatar
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    Quote Originally Posted by KamikazeGPR View Post
    It looks to me that the gasket(#2 in the service diagram) is # 7 on the parts finder
    4, 5, 6, and 7 are bolts to secure the supercharger to the engine. Look at the attached images (page 5-40 shows the different torque settings of those bolts)

    The oil filler bolt is just 3.0 ft/lb.
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  10. #10

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    Mitch. Thanks for your trouble in putting this on for us.
    I have printed this out from my question on, left the drawings small without blowing them up.
    My dealer I would assume would have to have all of this, so now in a day or so when I get the chance I shall hand them the print out to see what happens.

    Thanks again for your trouble, and will keep you guys informed.

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