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  1. #1

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    Can't start 1.8L HO engine with swollen impeller housing

    Hi GH community, can someone assist me in confirming if this is correct?

    I have a badly swollen impeller housing with 3 distinctly raised areas, it's shocking that the impeller even spins.

    But it does...

    However after a week of storage today I couldn't start the engine.

    It will crank/turn freely and sound fine but won't turn over and run.

    It sounds a little bit clunky and rougher at that moment where it should turn over than it did a week ago.

    Does this fit with a worsening impeller housing swelling situation?

    I understand eventually it will lock up the impeller/motor completely, but I had a friend verify for me that the impeller was turning as I was cranking.

    But is it possible the friction is preventing it from turning over and running?

    Or would these issues not be related?

    It's a brand new FX HO 2018, 140 hours on it used literally every day for the past 8 months without a single hiccup.

    P.S. -- I can't get the impeller housing off or I would pull the housing and replace it... but that's a whole other thread I suppose!


  2. #2

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    Basically... as the impeller housing swelling worsens, does the starting begin to get/sound rougher and rougher until it eventually won't start at all?

    Is there a correlation? I guess there must be one, I am mainly trying to reassure myself that nothing more serious is happening.

    Thanks GH community !

  3. #3
    Tool Bag water worx's Avatar
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    Get the pump out, if it was running a week ago it should be alright.

  4. #4

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    If it’s swollen nothing for it but get it swapped, surely it’s warranty?

  5. #5
    DR2006RXP's Avatar
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    Can't start 1.8L HO engine with swollen impeller housing

    Quote Originally Posted by HDAV View Post
    If itís swollen nothing for it but get it swapped, surely itís warranty?
    Swollen wear ring would be considered maintenance as it tends to not be considered a warranty item due to salt water/ corrosion causing the condition listed .

  6. #6

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    Quote Originally Posted by DR2006RXP View Post
    Swollen wear ring would be considered maintenance as it tends to not be considered a warranty item due to salt water/ corrosion causing the condition listed .
    On a 2018 ski? I would be disappointed on a ski under a year old if it was not classed as a defect the unit has 140 hours so in very regular use, I have know them get swollen but on skis that have been out the water for some time.


    Either way it needs to come out.....it’s not a big job to do.

  7. #7

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    Thanks guys, the tricky thing is getting it off.

    Right now I have the impeller housing unbolted from the transom plate, and I can't disconnect it there either after already getting denied at the impeller duct.

    The pry points on the impeller duct broke off, and the local dealer here recommended trying to free it from the impeller housing instead (where it meets the transom plate).

    I guess I need to just keep trying to get it off, hate to pay the dealer for something so simple.

    There are tales on here of guys using heat and even applying even pressure with a ratcheting tie down strap or a truck !

    Any tips to that end? Anything to be cautious of in particular?

    Thanks guys!

  8. #8
    steve45's Avatar
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    Impeller swollen and the pry points on the impeller duct broke off while trying to pry it off. Sounds like it wasn't flushed after use in salt water to me.

  9. #9
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by lagoondweller View Post
    ...

    I have a badly swollen impeller housing with 3 distinctly raised areas, it's shocking that the impeller even spins.

    But it does...

    However after a week of storage today I couldn't start the engine.

    It will crank/turn freely and sound fine but won't turn over and run.

    It sounds a little bit clunky and rougher at that moment where it should turn over than it did a week ago.

    Does this fit with a worsening impeller housing swelling situation?

    I understand eventually it will lock up the impeller/motor completely, but I had a friend verify for me that the impeller was turning as I was cranking.

    But is it possible the friction is preventing it from turning over and running?

    Or would these issues not be related?

    It's a brand new FX HO 2018, 140 hours on it used literally every day for the past 8 months without a single hiccup.

    P.S. -- I can't get the impeller housing off or I would pull the housing and replace it... but that's a whole other thread I suppose!
    The impeller binding may not be the reason the machine will not start.

    Is the battery well charged?
    Spark plugs checked for moisture on the tips, or other possible problems?

    All wire harness connections are good, nothing has become disconnected or got water inside?

    Is the fuel pump actually running when you press Start?

    Check the basics. Do you have fuel and spark?
    Is the battery voltage strong enough to fire up the engine?
    Security mode (Remote control fob) is not set to 'Locked'?
    No water in the fuel tank?

    Regarding the jet pump, after you eventually get it apart, I wonder if there is an aftermarket solid stainless steel version of the Yamaha wear ring, that would not distort from sea water exposure.

  10. #10
    txgp1300r's Avatar
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    did you try and spray some wd-40 up in the wear ring area just to get is loosened up ? you can heat the pump \ wear ring area up to about 200 degrees with a propane or map gas torch then spray in some Blast penetrating oil, let is cool down, heat it again then try to start it or better yet remove the wear ring. you should PM WFO he lives and works in Salt water and knows his stuff !

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