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  1. #1
    suck my wake's Avatar
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    Why you should fog your motor!!!!!!!!!!!!!

    Here boys and girls is why you should fog your motor if it's not going to be used for any lengths of time, the compression in this motor was down to 90/106/110, the owner thought he had a blown head gasket but instead it was alot worse. Now it's time for a rebuild and over bore, 2 sizes over He thought that just because he stored it inside all winter that it would be ok NOT to fog the motor..............He was wrong!! Don't make that mistake and think you know it all, you have no idea whats going on inside of your motor and the conditions that may be present that would do this kind of damage. This is an expensive mistake, a $10 can of fogging oil or a $3000 bill to rebuild................Which one do you want. Like the old saying goes, " you can pay me now........OR you can PAY me later "

    Chose the now!! Enjoy the pic's
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  2. #2
    dnielsen's Avatar
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    Awwww man that's NASTY! Good post, seems like I remember a forum member the other day posting that he never fogs the engine and seemed quite sure it was a waste of time........

  3. #3
    Eric Ocman's Avatar
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    What year is this ski? that looks like more than one sittings worth.
    what was his compression before?

  4. #4
    suck my wake's Avatar
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    Quote Originally Posted by Ocman View Post
    What year is this ski? that looks like more than one sittings worth.
    what was his compression before?
    Its an 06, the motor was rebuilt already because of a broken valve. It has been 2 seasons since then, never fogged the motor, not once so yea its probably from more than just this last winter's sitting. The ski was running 80 last fall so not terrible for the condition of the motor, the power was falling off though.........

  5. #5
    I don't disagree with your point about fogging; it should always be done before allowing a ski to sit for any appreciable amount of time.

    However, there is more wrong here than just lack of fogging. The primary reason for fogging has to do with the fact that all Sea Doo engines use water in the exhaust system for cooling. This makes the inside of the entire exhaust chamber sit at 100% relative humidity. With the older 2 strokes, there was no way to seal off the exhaust chamber from the cylinder, so fogging was imperative for these engines. However, a 4-TEC engine is supposed to always stop with all the valves closed, effectively sealing the cylinder from the high humidity of the exhaust. (but the exhaust valve stems are still exposed to high humidity, which is why the early exhaust valves tend to rust)

    Consequently, you shouldn't see corrosion like you see in that engine from the main source of humidity. So where did all that moisture come from, to cause all that cylinder corrosion? Leaky head gasket? Intercooler leaking, so that when it was originally shut down for storage, it had a high amount of moisture coming into the engine?

    Anyway, the main point of this is that on rebuild, he better figure out what was wrong, because if it isn't fixed, even fogging won't preserve it in the future.

  6. #6
    boost junkie skidoochris's Avatar
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    with the long intake runners it is very hard to get a good fog job and there are other fuel system parts that need lube now that we are burning e10+
    here is my fix to this problem, just put in lots of 2-stroke oil in your gas tank and then you will lube the fuel pump fuel injectors and the cylinders

  7. #7
    Eric Ocman's Avatar
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    Quote Originally Posted by skidoochris View Post
    with the long intake runners it is very hard to get a good fog job and there are other fuel system parts that need lube now that we are burning e10+
    here is my fix to this problem, just put in lots of 2-stroke oil in your gas tank and then you will lube the fuel pump fuel injectors and the cylinders
    Been using Lucas upper cylinder lubricant (few ounces per tank) in my ski per advice from duke since I have had it. Not sure how much it contributes to system longevity but I like their product.

    http://www.amazon.com/Lucas-10003-Cy.../dp/B000ARPVOI

  8. #8
    Stockrxp's Avatar
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    That's how mine looked after setting 3 months with a leaky intercooler. Thinking it was injector problem I didnt fog it.

  9. #9
    SplishSplash's Avatar
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    Quote Originally Posted by skidoochris View Post
    with the long intake runners it is very hard to get a good fog job and there are other fuel system parts that need lube now that we are burning e10+
    here is my fix to this problem, just put in lots of 2-stroke oil in your gas tank and then you will lube the fuel pump fuel injectors and the cylinders
    I never fog it when storing, but I do pull the sparkplugs and give each cylinder a good shot of mercury storage seal and spin it over a bit. Never had any issues that way. I scoped the cylinders and they are perfect.

  10. #10
    suck my wake's Avatar
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    Quote Originally Posted by SplishSplash View Post
    I never fog it when storing, but I do pull the sparkplugs and give each cylinder a good shot of mercury storage seal and spin it over a bit. Never had any issues that way. I scoped the cylinders and they are perfect.
    That's basically fogging the cylinders so you are doing something. Fogging isn't just shooting Down the intake tract

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