Impeller Choice
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Impeller Choice

  1. #1
    Junior Member
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    Default Impeller Choice

    Hodwy! Picked up my first jet boat at the end of last summer. It is an 18' Cougar (eliminator knockoff), with a N/a BBC. I took the boat out twice than noticed grease coming from the thrust bearing housing, after some reading I opted to use this for premis of a rebuild.

    Got it appart' turns out its got a beat up berkeley cast A cut impeller.

    The guy at the local shop is trying to sell me on a Tenzaloy impeller but I cant seem to find any information on them anywhere?

    What do you guys reccomend?

    Engine specs are

    BBC 468 10.5:1
    Alum heads
    comp 292h cam
    high rise mani

    Turnes 5400 Rpm with the previous jet.

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  3. #2
    Senior Member jetjunky's Avatar
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    Welcome to the boards and the wonderful world of jet boats. I believe tensalloy is an alum. aggressor imp. (I'm not certain if other mfg. used that particular material combo) Cut size- a,b,c etc. determines engine rpm range. You want to cut the impeller to the rpm band of the engine to maximize engine power use. From your engine build specs listed it sounds like you are in the max. h.p. range of all alum. impellers and would likely be wise to choose a mag/bronze or stainless steel imp. Cost difference will be several hundred dollars. The stainless can be welded (minor) repaired if necessary, the mag/br. not so much. I hope this helps. Have any pics. of your new hot rod boat?

  4. #3
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    Thank you for the information!
    I was having a hard time finding any information about the tenzaloy impeller and the power levels they would handle.

    Where is the best place to source out a bronze/mag impeller and the rest of the rebuild parts?


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  6. #4
    Senior Member jetjunky's Avatar
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    nice lookin float. Where are you located? I have a couple mag/bronze impellers if your interested as well as other rebuild parts if your interested.

  7. #5
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    Located just outside Vancouver, Brisith Columbia. I am very interested if you are willing to ship!

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