never seen this before.........
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never seen this before.........

  1. #1
    Senior Member LOLYFE's Avatar
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    Default never seen this before.........

    This is an imp just pulled out of a lady friends 21 cruiser, complained that boat made a lot of noise but did not go anywhere ,(kinda like RCL) had pump "supposedly" rebuilt last summer about three trips to lake. Has a 9.5 installed ( got me on that one? ) not sure what brand, aluminum A. Cant imagined what happened here, Ideas?? never seen one this bad, imp still looks new. Maybe let run too long on trailer?
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    Last edited by LOLYFE; 03-06-2013 at 02:53 PM.

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  3. #2
    Super Moderator HammerDown's Avatar
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    Maybe from shock > loading/unloading the bump at high rpm.
    Not sure if those grooves are result of debris...or...some pump-shops lath them in to make 'water-o-rings for less blow-by.
    I've read the above procedure is a waste and does nothing > Seloc Marine Jet drive' Seloc's Marine Jet Drive, 1961-1996: Tune-Up and Repair Manual (Marine Manuals): Joan Coles, Clarence Coles: 9780893300296: Amazon.com: Books
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    Senior Member 1975sleekcraft's Avatar
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    I have seen that when the bearing goes out...

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    Senior Member jetboatperformance's Avatar
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    This type damage can manifest from several conditions and the galling between Impeller and wear ring is like a snowball rolling down hill, may have started with a simple grain of sand amoung other things noted , whats the wearing look like what material assume there is metal transfer? any pics

  7. #5
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    Default Very front...

    Quote Originally Posted by 1975sleekcraft View Post
    I have seen that when the bearing goes out...
    Normally when the bearing fails the impeller is shoved forward and damages the very front. That impeller is damaged behind the front "lip" which would seem to be caused by running off center. He didn't show the wear ring or the suction housing, so it's hard to say what caused what, or what area failed first....
    Ray
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    Senior Member Mojave85's Avatar
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    What are the chances the shaft is bent? I would think if it was out of round (even just a little) it may cause problems like this.

  9. #7
    Senior Member APOLLO's Avatar
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    Same thing happened to one of mine one summer. My buddy took it out but did not (know) there was a sand bar under the boat chugged through it.

  10. #8
    BIG member Marko's Avatar
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    I think Grainger's sells parts for those things.










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  11. #9
    Senior Member hellnback's Avatar
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    Check the wear ring for nicks from a punch..... got one did the same.
    It may be OLD ,it may be Slow ... but at least it's MOBILE !!!

  12. #10
    Senior Member DuaneHTP's Avatar
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    Same thing happened to one of mine one summer. My buddy took it out but did not (know) there was a sand bar under the boat chugged through it.
    Looks like your buddy got a hold of this one too.

    If it were from running with a bent shaft, it would be a more one sided wear pattern. Rule that one out.

    If it were a Failed bearing, the front would be gone like mentioned above, rule that one out too.

    If it was from running off center, we could tell by looking at the wear ring. but kind of doubt that one.

    That could also be from dragging it down the road without the pump opening covered and then fireing it up on the trailer, or the old sand bar trick. Like Tom said, once the damage is started the metal galls and rolls up in balls very quickly.

    Wear Ring Picture?? Please!

  13. #11
    Senior Member 1975sleekcraft's Avatar
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    Quote Originally Posted by APOLLO View Post
    Same thing happened to one of mine one summer. My buddy took it out but did not (know) there was a sand bar under the boat chugged through it.
    if this was done by a sand bar.... I would think those impeller blades would be semi-polished...some where on them... They look pristine ..........

  14. #12
    Senior Member LOLYFE's Avatar
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    more pics of wear ring and end of shaft, one bowl bushing had pushed seal out and bushing out too, a lot of this looks like no maintenance, running it in sand/ gravel, galling of imp to wear ring. Has non shouldered wear ring, bearing still in original form, lacks grease, imp did not dig into suction housing, had about .50-.60 clearance between imp and suction housing face
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  15. #13
    Senior Member LOLYFE's Avatar
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    one more
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  16. #14
    Senior Member DuaneHTP's Avatar
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    Yep, rule out the running off center too.

    if this was done by a sand bar.... I would think those impeller blades would be semi-polished...some where on them... They look pristine .......... .
    Exactly, rule that one out too and tell the customer, (or friend), to please cover the intake of the pump while towing and DO NOT run it on the trailer any more.

    Duane HTP

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