Two questions from a newb
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Two questions from a newb

  1. #1
    Member pushingvws's Avatar
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    Default Two questions from a newb

    Hi

    This is my second season with a jet boat, (was free) mostly anyway. I have no where near the experience or the boat of a lot of members here but I'm enjoying the boat a ton. It's a 1974 Cobra Jet with an olds 455 and a berkeley pump.

    I have two questions.

    1. Since putting on a place diverter I have almost no reverse. I've tried with the diverter up or down, no luck. The waste gate opens and closes fine, but I don't know why ... no love on reverse, almost hit some rocks today. It seems like it just sprays water in the boat and I go forward still. Any suggestions? It had a lot more reverse with the stock nozzzle.

    2. Do you guys know anybody in the Sacramento area that could give my 455 a tune up?

    Thanks for any help.

    -Nick

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  3. #2
    "Try it Now!" Tahiti Boss21's Avatar
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    Quote Originally Posted by pushingvws View Post
    Hi

    This is my second season with a jet boat, (was free) mostly anyway. I have no where near the experience or the boat of a lot of members here but I'm enjoying the boat a ton. It's a 1974 Cobra Jet with an olds 455 and a berkeley pump.

    I have two questions.

    1. Since putting on a place diverter I have almost no reverse. I've tried with the diverter up or down, no luck. The waste gate opens and closes fine, but I don't know why ... no love on reverse, almost hit some rocks today. It seems like it just sprays water in the boat and I go forward still. Any suggestions? It had a lot more reverse with the stock nozzzle.

    2. Do you guys know anybody in the Sacramento area that could give my 455 a tune up?

    Thanks for any help.

    -Nick
    Is it closing all the way? With absolutely no gap left for water to escape straight out?

    as for the tuneup..can't help you there..does it have any symptoms? Orare you just looking for puttin some plugs in it?
    1992 Eliminator Daytona 21'

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    Senior Member GT Jets's Avatar
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    Is your Diverter a late style?, mine actually backs up quite well and it is a late design, does that gate go full down?

    I wouldn't think the boat would still go forward with the bucket down, somethings amiss...

    No reverse just makes them more fun to drive.

    GT
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

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    Senior Member jetboatperformance's Avatar
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    NO "R" ??? should be better? something needs an adjustment ? Call me Tom
    re the Tune up "nuthin to it" we'll walk you thru !

  7. #5
    Member pushingvws's Avatar
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    Quote Originally Posted by jetboatperformance View Post
    NO "R" something needs an adjustment ? Call me Tom
    re the Tune up "nuthin to it" we'll walk you thru !
    I have a new carb, new dist, plugs are one season old, wires, it was running good until today started coughing and sputtering towards the end of the evening. I guess there's not much left to tune except timing...

    The diverter is used off ebay... but in good shape... I'll include a couple pics. I assure you the bucket closes in reverse at the dock... as for when we're running, I can't say for sure, but it should.. the cable and controls are in good shape. Was wierd.. though... had to gas it and spin a doughnut to avoid the shore... the kids loved it, the wife didn't


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    Senior Member GT Jets's Avatar
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    Quote Originally Posted by pushingvws View Post
    I have a new carb, new dist, plugs are one season old, wires, it was running good until today started coughing and sputtering towards the end of the evening. I guess there's not much left to tune except timing...

    The diverter is used off ebay... but in good shape... I'll include a couple pics. I assure you the bucket closes in reverse at the dock... as for when we're running, I can't say for sure, but it should.. the cable and controls are in good shape. Was wierd.. though... had to gas it and spin a doughnut to avoid the shore... the kids loved it, the wife didn't



    Different type of "tune up", sounds good though

    GT
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

  9. #7
    Senior Member Ken F's Avatar
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    your reverse should work best with the diverter in the down position.

    Ken
    The liberals are asking us to give Obama time. We agree and think 25 to life would be appropriate.

  10. #8
    Senior Member cave's Avatar
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    How old is the gas? Do you have a water fuel separator filter? Water in the fuel can make your engine run rough.
    For your reverse are you shifting your diverter to the down position when you put the boat into reverse? Ken F is right on. If I have my place diverter up when trying to back up We all get a heck of a shower Point that deal down and you will go backwards.
    Takin it home

  11. #9
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    Default Reverse

    Are you running a hand throttle or foot throttle.Alot of times there is enough play in the hand controls and cables that it will allow the bucket to open slightly and you have no reverse.

  12. #10
    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by pushingvws View Post
    I have a new carb, new dist, plugs are one season old, wires, it was running good until today started coughing and sputtering towards the end of the evening. I guess there's not much left to tune except timing...

    The diverter is used off ebay... but in good shape... I'll include a couple pics. I assure you the bucket closes in reverse at the dock... as for when we're running, I can't say for sure, but it should.. the cable and controls are in good shape. Was wierd.. though... had to gas it and spin a doughnut to avoid the shore... the kids loved it, the wife didn't
    If it was running o.k. throughout the day, then messed up I seriously doubt it's your timing unless the hold down bolt is loose. I'd look towards crap in the fuel as suggested above. These old boats will often have stuff in the fuel tanks and without a good filter it can get to the carbs messing up needle seat assys. holding them open and flooding, or clog passageways.

    Quote Originally Posted by Ken F View Post
    your reverse should work best with the diverter in the down position.

    Ken
    Definitely agree with Ken here. It's possible that you're expecting too much from the diverter though. I've always found that the reverse doesn't work quite as well as the stock piece and just takes some getting used to.
    Last edited by Squirtcha?; 03-27-2009 at 05:55 AM.

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    Senior Member fleetimus's Avatar
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    Hey neighbor!!! Give me a call, I can give you a hand.

    530 320-0549

    Tim

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    simple but you do know you usually have to give it a little gas for reverse?? if your used to outdrives that one can throw you!!

  15. #13
    Member pushingvws's Avatar
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    Quote Originally Posted by greg shoemaker View Post
    Are you running a hand throttle or foot throttle.Alot of times there is enough play in the hand controls and cables that it will allow the bucket to open slightly and you have no reverse.

    That's a good point... hand throttle, and there's a slight bit of play... so maybe I'll check into it.

    Thanks,

    Nick

  16. #14
    Member pushingvws's Avatar
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    Quote Originally Posted by fleetimus View Post
    Hey neighbor!!! Give me a call, I can give you a hand.

    530 320-0549

    Tim
    Nice... I'll keep your number and give you a ring when I get a chance.

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