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  1. #1
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    Impeller too tight

    Anyone had this problem before? The impeller goes in okay but when I hit the starter, the engine barely cranks over. I try and turn it over with my hand on the coupler and it is really too tight.

    It cranks fine without the pump and the pump bearings are good. I shined a light in the pump and there just isn't much clearance between the pump and impeller. Any way to fix this?!


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    You want MINIMAL clearance. New is around 4-6 thou.

    Make sure your wear ring is fully seated in the pump. Sometimes it may hang up or be ""cocked" in there.

    Alignment issues?

    Loose pump bolts/nuts?

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Are you sure the impeller and/or stub shaft are not bent?

    Is this an extended jet pump, Pro 785, or short jet pump?

    Does the stator rim seat properly into the section in front?

  4. #4
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    I am using a short drive shaft so the impeller is using the housing as the wear ring. I will take it off and see if there is some gunk in there that would keep the stator from mating up properly with the housing.

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    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Was the impeller recently refurbished?

    Sometimes they add a little material to make up for wear ring wear. And once the engine is started, it will "wear itself in"

  6. #6
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    Perhaps...it is one of Bob's impellers that was rebent. I will still take it back apart and make sure there isn't any corrosion or gunk in there that might be keeping it from seating correctly.

    I don't think the stub shaft is bent at all as the impeller rotates without any wobble. Also, alignment is dead on.

  7. #7
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    Okay, I took the pump off and there was not anything that would prevent it from seating squarely. I went ahead and spread some grease all the way around the pump and hit the starter to see where it is hitting.

    You can see here the shiny parts where the grease has been scraped off by the prop. I went ahead and put the prop in the 4" extension and it fits in there fine and doesn't hit anywhere.

    Why the hell is this pump housing bowed out a little bit here?? I took my fingers and ran them over the spots and I can feel where it is slightly bowed up...not much, but very very little....pretty much right under where the pump bolts are.
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  8. #8
    2&4strokepolaristech's Avatar
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    Quote Originally Posted by hyoctane23 View Post
    Okay, I took the pump off and there was not anything that would prevent it from seating squarely. I went ahead and spread some grease all the way around the pump and hit the starter to see where it is hitting.

    You can see here the shiny parts where the grease has been scraped off by the prop. I went ahead and put the prop in the 4" extension and it fits in there fine and doesn't hit anywhere.

    Why the hell is this pump housing bowed out a little bit here?? I took my fingers and ran them over the spots and I can feel where it is slightly bowed up...not much, but very very little....pretty much right under where the pump bolts are.
    Todd,

    You need a new pump housing. The aluminum and stainless are not getting along and you have corrosion between the two pushing in on the stainless insert creating a high spot in the housing. It is very very common in salt water units. If you would like a new one just let me know and I may have one in stock.....

    Jay

  9. #9
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    SON OF A BITCH!!! I am getting tired of spending money on this damn boat!! WHO WANTS IT FOR $500??

    Not really, but shit....I guess I'll need the alignment tool for a bit longer. How much for the housing?

  10. #10
    Home grown engineer, and professional tinkerer. 2 Strokin' Polaris's Avatar
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    Where do you ride when you aren't fighting things like this? If you are ever in the fresh water, I will keep my eyes open. I can be found on the San Jacinto River, and Lakes: Houston, Conroe, and Livingston.

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