[Question] have a 78 challenger with jet pump question
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have a 78 challenger with jet pump question

  1. #1
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    Default have a 78 challenger with jet pump question

    had a dominator pump from a jacuzzi placed in boat and am being told that possibly not installed correctly. i looked underneath and seems to be the wear ring possible shift towards the front of the pump assembly. the boat has a 468 and at 6000 rpm should be running at 75 plus. but only shows to run at 60 ish.. also notice that once in the water it takes approx 20/30 seconds to get water in the pump in ordeder to remove from trailer.. any ideas?? im trying to load pics as well.. also what about the stuff plate
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  3. #2
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    Quote Originally Posted by jetboatfiend View Post
    had a dominator pump from a jacuzzi placed in boat and am being told that possibly not installed correctly. i looked underneath and seems to be the wear ring possible shift towards the front of the pump assembly. the boat has a 468 and at 6000 rpm should be running at 75 plus. but only shows to run at 60 ish.. also notice that once in the water it takes approx 20/30 seconds to get water in the pump in ordeder to remove from trailer.. any ideas?? im trying to load pics as well.. also what about the stuff plate
    Couple things I see that should be corrected. First the adapter ring that house's the impeller should be blended in with Poxy Putty so the lip will have a nice transition going into the impeller. Secondly the loader you are running aims real low in the suction housing this will cause poor loading to the impeller. I would aim those about a 1/2 inch above the eye of the impeller , this should help in loading the pump more efficiently and hopefully drop some rpm's and increase the speed. As far as the the time it takes to load the pump, this is caused by an air bubble trapped in the roof of the bowl an suction piece. They make a small bleeder that goes on top of the bowl that will eliminate this problem. For right now back the boat down with the reverse bucket open and see if that will help. Do you run a droop snoot?

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