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  1. #1
    PWCToday Newbie
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    Crank Case Oil!????

    Ok so I have owned my 1981 kawasaki 550 for about a year now and have been told that you do not need to run anytype of lubracant in the crank case because the oil to gas mixture takes care of it.
    Just recently I purchased a 1993 750 sx and the guy said that he runs mobil 1 oil in the crank case!!!????
    I am now totally lost do I need oil in the crank case or not???

  2. #2
    PWCToday.com Is My Home Away From Home ghostrider117's Avatar
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    Re: Crank Case Oil!????

    no, you do not add oil to the crankcase.unless its a 4 stroke.
    rn superjet
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  3. #3
    PWCToday.com Is My Home Away From Home PrickofMisery's Avatar
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    Re: Crank Case Oil!????

    The guy you bought the 750 from was a fool.
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  4. #4
    PWCToday.com Is My Home Away From Home john zigler's Avatar
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    Re: Crank Case Oil!????

    these guys above are correct. your 550 ( and 750) are two strokes, and the motor gets lubricated, by the oil added to the gas.

    you "may" want to check the font mag housing cover on your 750. it has an inspection cap, and people sometimes add oil here. ( i have seen it many times). if the guy before you did, you need to take this apart and clean it out right away.

    zig
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  5. #5
    Banned SflSwampRat's Avatar
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    Re: Crank Case Oil!????

    Quote Originally Posted by john zigler View Post
    these guys above are correct. your 550 ( and 750) are two strokes, and the motor gets lubricated, by the oil added to the gas.

    you "may" want to check the font mag housing cover on your 750. it has an inspection cap, and people sometimes add oil here. ( i have seen it many times). if the guy before you did, you need to take this apart and clean it out right away.

    zig
    oil in the mag housing isnt THAT big of a deal. no, you dont want it full of oil, but it rarely, if at all, causes damage. it typically preserves everything in the area.

    but, do still drain it. i prefer to have a little oil in there to displace moisture.
    Last edited by SflSwampRat; 12-13-2009 at 10:21 AM.

  6. #6
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    Re: Crank Case Oil!????

    Awsome thanks guys I will do just that!!

  7. #7
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    Re: Crank Case Oil!????

    The guy I bought it from said that the motor was bored over and has bigger pistons in it, thought it has the stock head on it. Would this make a difference or does the oil in the crank case still need to be drained??
    I still have yet to pop the head off and see if it actaully has be bored out

  8. #8
    PWCToday.com Is My Home Away From Home PrickofMisery's Avatar
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    Re: Crank Case Oil!????

    Drain the Oil. behind that cover is the flywheel and stator (electronics) and is sealed from the crankcase.

    Also double check the year of your 550, as Kawasaki didnt start making them until 1982.
    Last edited by PrickofMisery; 12-13-2009 at 11:18 AM.
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  9. #9
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    Re: Crank Case Oil!????

    a two stroke works like this


    This should show you why you don;t want a bunch of oil down there. The green stuff is gas and oil mixed with air. That oil lubricates the crank,


    This is a four stroke
    http://en.wikipedia.org/wiki/File:4-Stroke-Engine.gif


    The mag housing is not connected to the crankcase in any way other than that the magneto/flywheel spin with the crankshaft. Magneto spins around stator to create electricity. Like an alternator in a car. Obviously you don't want oil in there.

    It seems like your question has been answered but i wanted to give you a why so.
    Last edited by mcurcio1989; 12-13-2009 at 07:13 PM.
    Yes, i don't spell check or grammar check and i make frequent grammatical errors. If anyone wants to tell me that why don't you just bite your tounge. Were on here to share our knowledge of the great invention that is the jet watercrafts and lets keep it to that!!

  10. #10
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    Re: Crank Case Oil!????

    Ok cool thanks, I started it up before I bought it and it didnt seem to smoke or anything and the guy said he has had it and been runnin oil in the crank case for like two years??? I dont know if he was just bs n or what but its kinda got me confused, I dont think the engine is a four stroke, but is there a way to tell the difference?

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