I have jet questions.. I am a noob.
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I have jet questions.. I am a noob.

  1. #1
    Senior Member 1975DiMarco490ci's Avatar
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    Default I have jet questions.. I am a noob.

    So instead of calling Tom at Jet Boat perf. and waisting his time (like i have done many times) I will just post here.

    Is it bad for the jet-> to start your boat up out of water using the garden hose? What is the right way to "dry fire" a boat?

    After you pull the boat out of the water do you "need" to fire it up to clear water out?
    I HAVE DRAINS FOR MY ENGINE

    Is there any break in time for a new jet?

    I think that is all i have. thanks guys.
    WILL KILL FOR A GULLWING.


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    Senior Member JetBoatCop's Avatar
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    Well, the best way to dry fire an engine, is to disconnect the pump from the engine. With a garden hose, you'll never be able to get enough water to the pump.
    '78 Taylor SS 460 BBF, Under Construction
    '03 Glastron SF 185 18', 4.3 Volvo Penta
    '95 Dodge Cummins 3500 4x4 Single Cab, Dually, Triple Gauges, and some pump work!

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    Senior Member fleetimus's Avatar
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    Lots of opinions on dry start. Bottom line, do not dry start. Disconnect the pump.

    No, you do not need to fire the boat after taking it out of the water.

    Only break-in would be "do not dry start"

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    Boat Nut sleekcrafter's Avatar
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    You will find hundreds of opinions posted on the topic, in other threads. Chances are your boat has been dry fired in the past, and the damages are already done. It's not something you want to do on a fresh or well performing pump. Although there is not any mechanical contact between the impeller and the wear ring, heat is generated, by the proximity of the moving parts, this is where the problem lies.

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    Senior Member 1975DiMarco490ci's Avatar
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    ok.. one more question.

    I am putting a loader and a 5 degree intake on my new tahiti is there any way to over load the pump? I have a 489 BBC with about 715hp off bottle
    WILL KILL FOR A GULLWING.


  8. #6
    Boat Nut sleekcrafter's Avatar
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    Quote Originally Posted by 1975DiMarco490ci View Post
    ok.. one more question.

    I am putting a loader and a 5 degree intake on my new tahiti is there any way to over load the pump? I have a 489 BBC with about 715hp off bottle
    Shoe, and loader, control the pump loading. Shoe controls the lower side and the loader controls the upper portion. Key is to not have them hanging below the keel, but still do do the job.

  9. #7
    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by 1975DiMarco490ci View Post
    So instead of calling Tom at Jet Boat perf. and waisting his time (like i have done many times) I will just post here.

    Is it bad for the jet-> to start your boat up out of water using the garden hose? What is the right way to "dry fire" a boat?

    After you pull the boat out of the water do you "need" to fire it up to clear water out?
    I HAVE DRAINS FOR MY ENGINE

    Is there any break in time for a new jet?

    I think that is all i have. thanks guys.
    75 DM , 'Never want you to feel like your wasting my time , always willing to talk boats and help . Personally I'd pull or disconnect the DL for cam breakin, just my 02

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    Senior Member moneysucker's Avatar
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    Posting here is a good way to get Tom to answer on a Sunday though.

    I love seeing the people who fire their boats up on the ramp. the only thing they are doing is possibly blowing a little water out of the logs. The motor will have the water in it regadless and the bowl will as well so realisiicaly there is on real reason to fire it up onthe way out the ramp besides to impress all the jackasses on the ramp waiting for someone to do something stupid.

    Cy
    Vinyl Graphics, Magnetic signs, Reg #s, Boat names, Banners, Boat decals, Etc. Please contact me Via facebook or e-mail [email protected].

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    Senior Member JetBoatCop's Avatar
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    Tom is a great guy. He's always taken time out of his day to walk me through stuff. This is my first jet, and I was lost at the begining of my rebuild. I'll owe the first run, and all the runs after that, on the water to Tom. He'll steer you in the right direction.
    '78 Taylor SS 460 BBF, Under Construction
    '03 Glastron SF 185 18', 4.3 Volvo Penta
    '95 Dodge Cummins 3500 4x4 Single Cab, Dually, Triple Gauges, and some pump work!

  12. #10
    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Quote Originally Posted by 1975DiMarco490ci View Post
    So instead of calling Tom at Jet Boat perf. and waisting his time (like i have done many times) I will just post here.

    Is it bad for the jet-> to start your boat up out of water using the garden hose? What is the right way to "dry fire" a boat?

    After you pull the boat out of the water do you "need" to fire it up to clear water out?
    I HAVE DRAINS FOR MY ENGINE

    Is there any break in time for a new jet?

    I think that is all i have. thanks guys.
    Dry starting:
    This is as bad for opinions as "which oil to use", some claim it's fine, some claim it is bad.
    I say don't do it unless ABSOLUTELY needed (and I have not absolutely needed in 2 decades).
    You may get away with it with a metal wear ring installed (like most have), but, I have seen damage done.
    With my polyurethane wear ring, you DO NOT DO IT, unless you want to replace the ring (which lasts a VERY long time if not abused like this, but is priceey).

    The pump drains out, all but a bit in the borttom of the bowl.
    The engine drains out to the level of the water inlet. Just trailer it and go, don't start it again.

    On "break-in-time" for a newly-overhauled jet.
    Once again, you get the opposing opinions. Thye seem to do it like they do engines, either "fire it up and run it like you stole it", or (my camp) give it a few easy hours, running it progressively harder, and THEN run it like you stole it.

    These things change also depending on if you have a moderately loosely clearanced pump for general boat use, or a very tightly clearanced racing setup.

    Good luck to you, and welcome.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
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    The rest of us are being dragged along kicking and screaming.

  13. #11
    Senior Member Delemorte's Avatar
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    So my jet is getting rebuilt now and will NEVER dry start again.. However i do have a question...


    To disco that shackle/ u-joints (what ever you call them) from the pump to the engine. It is covered by the bell housing. It looks like i can remove the bell housing with out removing the motor but didnt know if that was required to hold the engine in place?

    The motor does have two side mounts and the gigantic plate in front holding onto it so wasnt sure the best procedure for disconecting the pump from the motor with out yanking or additionally supporting the motor?

    Im sure to someone who has done this its seems very simple but want to make sure i dont do something stupid...
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

  14. #12
    Senior Member Ken F's Avatar
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    Quote Originally Posted by moneysucker View Post
    Posting here is a good way to get Tom to answer on a Sunday though.

    I love seeing the people who fire their boats up on the ramp. the only thing they are doing is possibly blowing a little water out of the logs. The motor will have the water in it regadless and the bowl will as well so realisiicaly there is on real reason to fire it up onthe way out the ramp besides to impress all the jackasses on the ramp waiting for someone to do something stupid.

    Cy
    Cy, I always fire mine after pulling it out to dry out the inside of the headers, and warm them up enough to evaporate all of the moisture out of them. I've always been told that moisture & water causes rust...am I wrong here?

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

  15. #13
    Senior Member Ken F's Avatar
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    Quote Originally Posted by Delemorte View Post
    The motor does have two side mounts and the gigantic plate in front holding onto it so wasnt sure the best procedure for disconecting the pump from the motor with out yanking or additionally supporting the motor?

    Im sure to someone who has done this its seems very simple but want to make sure i dont do something stupid...

    A couple of pictures might help...
    The liberals are asking us to give Obama time. We agree and think 25 to life would be appropriate.

  16. #14
    Senior Member Delemorte's Avatar
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    Quote Originally Posted by Ken F View Post
    A couple of pictures might help...

    I can do that.. One sec..
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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