Question about Cylinder stamp/ head stamp? - Page 3
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  1. #21
    PWCToday Regular
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    Re: Question about Cylinder stamp/ head stamp?

    Quote Originally Posted by wmazz View Post
    That looks like water ingestion (while the engine was running)
    that eventually seized.

    You need to be sure the engine couplers splash guard is in place.
    If there is an aftermarket flush kit on top of the cylinder head;
    remove it. Retorque the head and exhaust manifold after ~10 hrs.

    Inspect the rubber driveline carrier for cracks and if the X2 has
    issues with taking on water, get the water leaks fixed.

    Inspect cooling hoses for any leaks.


    Were your old exhaust manifold gaskets aftermarket (composite)
    or oem Kawasaki (stamped sheet metal).


    Bill M.
    Bill, I'm doing a complete engine rebuild with all new OEM gaskets. What is the "engine couplers splash guard" you're talking about? Thanks for the pointers/info. Really appreciate it since this will be my first engine rebuild.

  2. #22
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Question about Cylinder stamp/ head stamp?

    You need to have the Driveline coupler splash guard to prevent
    water from being slung/sprayed into the flame arrestors while you
    are riding.

    It is one possible reason for the water damaged pistons.

    It is a problem on all watercraft brands.


    Bill M.
    Attached Images Attached Images
    Last edited by wmazz; 10-15-2021 at 02:48 AM.
    Horsepower == Speed, RPM != Speed



  3. #23
    PWCToday.com Is My Home Away From Home john zigler's Avatar
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    Re: Question about Cylinder stamp/ head stamp?

    I agree your pistons look like water ingestion. Even though it IS important to have your coupler cover, I am betting this came from your cracked head. (That you noted earlier).

    Bottom line, go over everything with a fine tooth comb upon assembly. (Both engine, and ski)
    RCJS also doing business as WATCON
    608-743-1305 9am to 5pm CST m-f
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    Please visit our web site

    new parts / products / services www.watcon.com
    thank you

    Please check out and like WATCON on Facebook

  4. #24
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    Re: Question about Cylinder stamp/ head stamp?

    Thanks guys! Bill, yes the splash guard was installed on the ski when I was removing the engine. I'm leaning to what John said that the water probably got into the engine due to the cracked head. Here is what the flywheel looked like when I removed the from cover. From the looks of everything and the muck that came out of the engine i'm pretty sure water got into the engine.

    IMG_2079 (1).jpg

  5. #25
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Question about Cylinder stamp/ head stamp?

    Quote Originally Posted by TROL View Post
    Here is what the flywheel looked like when I removed the from cover.

    From the looks of everything and the muck that came out of the engine i'm pretty sure water got into the engine.

    IMG_2079 (1).jpg
    Water could have easily been sucked into the engine through a worn out
    front main seal directly into the front cylinder.


    There is a problem with crankshafts that have been exposed to rust. If
    the nose of the crank has rust damage (specifically the area in between
    the main seal and the rear of the flywheel), it can cause the front main
    seal to wear out quicker than normal.

    This is something people need to watch out for on an engine rebuild or
    when purchasing a rebuilt crank. The rust damage causes pitting where
    the main seal lips make contact, and that will prematurely wear out the
    main seal.

    If necessary, you can use Crocus cloth to minimize the rust damage, and
    no matter what, smear the inside of the main seals with a high quality
    grease during assembly.



    Bill M.

    Remove as much rust as you can from the flywheel before reassembly.
    Rust and other metal particles will wear out the front main seal too.
    Last edited by wmazz; 10-16-2021 at 03:10 AM.
    Horsepower == Speed, RPM != Speed



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