I finally had her out, NOT happy!!!
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I finally had her out, NOT happy!!!

  1. #1
    Member ry-guy's Avatar
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    Default I finally had her out, NOT happy!!!

    I finally got a chance to get my Eliminator the water. Ran great thru the channel, good oil pressure and temp hovering around 160. But as I started to increase the RPM out of the channel the boat felt like it fell on its face and was slowing down. Only when I really got into the throttle, past about 4k she really picked up and got on plane. From reading past posts this sounds like an impeller issue, Im not sure? I also noticed when I stopped to check everything out in the engine bay the rope seal was leaking. Sounds like its time to pull the pump. All advice is welcome to get this problem solved.
    Thanks,
    ry-guy
    84 Eliminator Sport, 454, Berk JG
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    Senior Member wpmxwb's Avatar
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    My understanding is The rope seal should have a slight drip. You can tighten up the bolts on both sides evenly a 1/4 turn at a time but not to much. Sounds like a carb issue to me. Have u gone through the carb? Are the accelerator pumps working?
    Last edited by wpmxwb; 08-12-2012 at 11:42 AM.
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    Senior Member kidd bill's Avatar
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    Could it possibly be carb related... maybe float too high, as soon as you start coming on plane the bow rises a bit and fuel pours unmetered in cause the bowl is too full, once on plane it settles down and the extra rpm helps use any possible fuel??
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    Member BIG JOHNSON's Avatar
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    Might have picked up some grass and blew it out when you got on it? Did it only do it the one time?

    Sent from my ADR6400L using Tapatalk 2
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    Member ry-guy's Avatar
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    Sounds like good places to start, I checked the float levels when the boat was on the trailer, but I will recheck with it sitting at the dock, also I will try to tighten the rope seal slightly and see if it slows it down. Thanks, ry-guy
    84 Eliminator Sport, 454, Berk JG
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    Member ry-guy's Avatar
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    Quote Originally Posted by BIG JOHNSON View Post
    Might have picked up some grass and blew it out when you got on it? Did it only do it the one time?

    Sent from my ADR6400L using Tapatalk 2
    It was consistent, every time it got to around 3-3500 it would nose over
    84 Eliminator Sport, 454, Berk JG
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    Senior Member sandeggo's Avatar
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    I've always been told you wanna tighten the packing seal to a drip every couple seconds. Set the floats with the boat sitting in the water.
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    Member ry-guy's Avatar
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    Will do!! I'll try to get it in the water Monday or Tuesday after work
    84 Eliminator Sport, 454, Berk JG
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    Senior Member Brendellajet's Avatar
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    Is this your first jetboat? With a prop boat, you can creep on the throttle to get on plane, it doesn't work well with a jet though. Best to get on it to nose it over quickly and then back off once on plane. If the boat has a diverter, lower it all the way when coming out of the hole. Ifyou have a droop on there too, perhaps a 4°down wedge would help if it doesn't have one.
    "He is a lover, not a fighter. But he's also a fighter, so dont get any ideas."
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    Yes this is my first jet, and it is turning out to be a huge learning curve. It definitely drives different than any other boat I drove before!
    Silly question on the packing seals, when you mentioned a drip every few seconds, is that with the pump/ engine running or off? I had a steady slow stream while off!
    84 Eliminator Sport, 454, Berk JG
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    Senior Member sandeggo's Avatar
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    While off
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  14. #12
    Icy
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    Boatless Member :( Icy's Avatar
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    When I drove our challenger jet I'd go to 4.0-4.2k rpm and then back down to 3,000-3,200 for cruising.

    Treat it like you're pulling a skier out of the water then back off once you learn the boat.
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    Boss of the McIntyre Mob danhercules's Avatar
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    I have a 21 deck. Its heavy. I mash the throttle to at least 4500, usually closer to 6k to get on plane. As it rolls over back off. If you rev and go nowhere, then look at the pump.


    Very first TPR 21' Deck. 528 BBF 736hp on pump gas built by High Flow Dynamics

    McIntyre Mob. Where the rejects play!
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  16. #14
    Senior Member jet pilot's Avatar
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    Cool

    Quote Originally Posted by ry-guy View Post
    Yes this is my first jet, and it is turning out to be a huge learning curve. It definitely drives different than any other boat I drove before!
    Silly question on the packing seals, when you mentioned a drip every few seconds, is that with the pump/ engine running or off? I had a steady slow stream while off!
    shouldn't leak at all while off, should drip while running only enough to cool and lubricate the shaft.
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