Question for you racers
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Question for you racers

  1. #1
    What the Hell is That? 72Hondo's Avatar
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    Default Question for you racers

    Or any one who owns a jet boat. At the races I always hear the announcer BGJ BGF etc warm up your engines.

    I watched most of them and its just a turn of the key and the motor runs. Well duh What I'm trying to say is when I warm the engine up I have to stay on the throttle a little bit till it gets warm then it will run just fine, but if I let off the throttle and its not warm it will just die. I have the Chokes removed from the carbs. I'm wondering how its just a turn of the key and she fires and runs just fine with out any input from the driver.

    I am in the process of Rebuilding my pump and really want to be Super Strict about running it out of water but I have always had to warm the engine up on the ramp then just drop it and go.

    Jet a way wont work for me. So any input is Appreciated
    Quote Originally Posted by Kyle View Post
    Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.

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  3. #2
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    Sounds like your carbs are too lean when it's cold, a choke makes it run richer (fatter). Fat is where it's at, saves parts, easy cold starts, I think you should change the jets in your carb... IMO

  4. #3
    no need 2 fake it. 84Condor's Avatar
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    x2, thats how my carb was when i first got the boat this past summer- oh, and the float bowls were filled with so much trash it was discusting
    "i'm into snatchin' kisses... and vice-versa!" haha

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  6. #4
    What the Hell is That? 72Hondo's Avatar
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    I have gone thought both carbs and cleaned them out they run fine its just the whole warming up thing that I don't like. Taking to my dad ( Previous owner) Its always been that way because the chokes have been removed I always gone along with that thinking untill watching every one else. then when i said hey wait a min.
    Quote Originally Posted by Kyle View Post
    Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.

  7. #5
    Amber Racing Services BUSBY's Avatar
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    Cold Start, BGJ (injected)

    Click here for the video

    Blown jets like to be fat, real fat at idle

  8. #6
    jetboataholic HawaiianJet's Avatar
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    I don't have a choke on mine either, single 850 Holley DP. Two quick pumps of the gas, turn the key, fires right up no problems.
    Last edited by HawaiianJet; 01-20-2009 at 09:25 PM.
    HJ

    ***FOR SALE*** 1978 19' Full Stringer Hawaiian Molokai Jet Boat w/ Berkeley 12JC-AB and Chevy 440 Tall Deck ***FOR SALE***

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    Oh yeah, Forgot to mention that the hull is a special mixture of speedcote, herculiner and rain-x, all blended together- good for another 8 mph top end.

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    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by HawaiianJet View Post
    I don't have a choke on mine either, two quick pumps of the gas, turn the key, fires right up no problems.
    Not a racer, but same same. Two 660s without chokes and starts right up cold or hot. Single 850 DP without choke was the same before going to the tunnelram and dual carbs, and a chokeless 750 vac sec before that. Oh yeah.....not blown either......well sometimes I am.
    Last edited by Squirtcha?; 01-22-2009 at 04:43 AM.

  10. #8
    Senior Member blownjet's Avatar
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    Quote Originally Posted by BUSBY View Post
    Cold Start, BGJ (injected)

    Click here for the video

    Blown jets like to be fat, real fat at idle
    Brian, that thing sounds bitchen on video and better in person!! I know because I get Ron first round all the time. That thing fired up just like my carbed shit.

  11. #9
    Amber Racing Services BUSBY's Avatar
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    Quote Originally Posted by blownjet View Post
    Brian, that thing sounds bitchen on video and better in person!! I know because I get Ron first round all the time. That thing fired up just like my carbed shit.
    That's when I was tuning on it 3 years ago or so.

    It's not so crisp anymore. No longer my problem.

    He took out his blower 3 times in Phoenix @ World Finals ... whatever he's doing now, isn't working.

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    Quote Originally Posted by Btnhtillidie View Post
    I have gone thought both carbs and cleaned them out they run fine its just the whole warming up thing that I don't like. Taking to my dad ( Previous owner) Its always been that way because the chokes have been removed I always gone along with that thinking untill watching every one else. then when i said hey wait a min.
    Carbs are too lean when it's cold.... don't clean the jets - change the jets to a larger size.

  13. #11
    What the Hell is That? 72Hondo's Avatar
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    Wow my setup needs a tune up,

    I have dual 750's atop a 177 blower
    Quote Originally Posted by Kyle View Post
    Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.

  14. #12
    I'm No Expert Shaun's Avatar
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    Quote Originally Posted by hotrod56cars View Post
    Carbs are too lean when it's cold.... don't clean the jets - change the jets to a larger size.
    Are you talking about the idle circuit jets? It was my understanding that the primary/secondary jets on the carbs do nothing at idle.

    If he needs to fatten it up at idle, wouldnt adjusting the idle mixture screws be what he wants to start messin with first?

    Btnhtillidie, whats this thing idle at normally? is it blown or na?

  15. #13
    What the Hell is That? 72Hondo's Avatar
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    It idel's at 800-900 and it has A 177 B&M blower on it
    Quote Originally Posted by Kyle View Post
    Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.

  16. #14
    no need 2 fake it. 84Condor's Avatar
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    Quote Originally Posted by BUSBY View Post
    Cold Start, BGJ (injected)

    Click here for the video

    Blown jets like to be fat, real fat at idle

    good god busby- that thing sounds awesome... if any of you have seen Napoleon Dynamite "i want that..."
    "i'm into snatchin' kisses... and vice-versa!" haha

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