Another Impeller Question
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Another Impeller Question

  1. #1
    Senior Member SBS933's Avatar
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    Default Another Impeller Question

    Well, Budweiser turned me on to a pump curve and I realized I requested 5400 R.P.M. as a target. This would put me in a bronze impeller. I thought it was aluminum or stainless only, I never heard of bronze. Here comes the question, It seems I am gonna come close to the 5400 target if not nail it. Should I just go ahead and buy the impeller and have it on before I run it ? It seems stupid not too.
    Last edited by SBS933; 11-03-2012 at 08:53 AM.

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by SBS933 View Post
    Well, Budweiser turned me on to a pump curve and I realized I requeted 5400 R.P.M. as a target. This would put me in a bronze impeller. I thought it was aluminum or stainless only, I never heard of bronze. Here comes the question, It seems I am gonna come close to the 5400 target if not nail it. Should I just go ahead and buy the impeller and have it on before I run it ? It seems stupid not too.
    Depending in the internal health of the jet and depending on what aluminum impeller is currently in the jet , It may be usefull to what you have to help establish some sort of baseline prior to spending the $$ on a bronze or stainless

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    Senior Member SBS933's Avatar
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    I recently rebuilt it with low hours on it. I feel it will be okay for a family boat with a mild motor upgrade.

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    Senior Member DuaneHTP's Avatar
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    Still; those compression numbers are not right. Something is wrong, or you are not getting an accurate compression reading???

    Duane HTP

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    Senior Member HBInHeat's Avatar
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    4500 rpm on a low hp.deal id go.aluminum all day specially on a family boat

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    Senior Member SBS933's Avatar
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    Quote Originally Posted by HBInHeat View Post
    4500 rpm on a low hp.deal id go.aluminum all day specially on a family boat
    H.B. Actually it is 5400 I had to edit that. but I agree with you it's still a family deal and I don't see a need to upgrade.

  9. #7
    Senior Member SBS933's Avatar
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    Quote Originally Posted by DuaneHTP View Post
    Still; those compression numbers are not right. Something is wrong, or you are not getting an accurate compression reading???

    Duane HTP
    Those test numbers are when it was cold, maybe i need to run it and pump up the lifters and get things warmed up. I just wanted to see if things were equal in all cyls.

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    Senior Member SBS933's Avatar
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    Mistake, 140 PSI on the compression test. Hope those numbers sound normal.

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by SBS933 View Post
    Mistake, 140 PSI on the compression test. Hope those numbers sound normal.
    140 is more realistic and what your looking for are even numbers derived under the same basic conditions and with very little variation Tom

  12. #10
    Senior Member Rivernut's Avatar
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    If it is just a pretty boy boat used to drive in circles looking for attention, go aluminum. It it is a jet boat with a real purpose, like fishing in a shallow rocky river, go stainless.
    Last edited by Rivernut; 11-04-2012 at 03:47 PM.

    Real Boats Don't Have Propellers!
    -- Rivernut

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