Running out of water
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Running out of water

  1. #1
    Senior Member k5-cj5's Avatar
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    Default Running out of water

    I have read a lot of conflicting information about running a jet out of water. Is it acceptable for the boat to run for a few seconds without water to the pump? If there is a hose spraying thought the intake of the pump is that sufficient for short amount of run times? I know the engine needs water but separate from the pump. Thanks.

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    Senior Member 1975sleekcraft's Avatar
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    Fire it up! I have been running my boats on the trailer for decades...I have never seen any problems...I raced my boat last year...I had to warm it up before every race...(pump spinning)...over winter i wanted to add a shoe and a ride plate...pulled the pump all apart and seen no problems!!! in anycase there should be alot of people telling you not to do it...
    Just run it for a minute or less and you will be fine!!!
    75 Eliminator

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by k5-cj5 View Post
    I have read a lot of conflicting information about running a jet out of water. Is it acceptable for the boat to run for a few seconds without water to the pump? If there is a hose spraying thought the intake of the pump is that sufficient for short amount of run times? I know the engine needs water but separate from the pump. Thanks.
    Use the search function on here for more threads ,information and differing opinions on this subject than you can stand , ours opinion is still no

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    Senior Member k5-cj5's Avatar
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    Pk thanks for the info...Ill do some searching!

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    Senior Member rogerroost's Avatar
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    I think the key is to understand the risks, then make your own choice. The risk is burning the packing seal at the input shaft, and having damage from dirt or debris between the impellor and wear ring , and deflection in the pump shaft from reving it unloaded. I'll run mine for a short time with no water.

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    I would suggest hooking up a garden hose to the cold water intake. It is usually pretty easy. Also, loosen off your pump packing nuts. Lastly, I take off my bowl and impellor. This prevents the impellor from rubbing against the wear ring, it could cause a lot of wear to the impellor and the wear ring because of silt in the pump. Hope this helps.

  9. #7
    Senior Member rogerroost's Avatar
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    so you would suggest to this guy to run his boat
    with the pump shaft spinning without any support at the end of the shaft.

  10. #8
    Senior Member 67weiman's Avatar
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    Remove the bowl and impeller? Seems like a ton off work to run it. Disconnect the drive line, it's 4 bolts.

    Sent from my VS980 4G using Tapatalk

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    Quote Originally Posted by 67weiman View Post
    Remove the bowl and impeller? Seems like a ton off work to run it. Disconnect the drive line, it's 4 bolts.

    Sent from my VS980 4G using Tapatalk
    Nope, that's too simple.
    It may be the best way, but it's just too simple.

  12. #10
    LP-25.com Infomaniac's Avatar
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    Hook a water hose to the water exit and run it backward through the engine and pump. Even have someone hold the hose up against it.

    If you have descent water pressure just enema the pump. Water will make it to the front. If it's running out the intake its getting the wear ring
    If For Some Reason I Do Something Worthy Of Recognition. God Provided The Ability And Deserves The Credit.


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    83 Crusader - 468 BBC SNiC's Avatar
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    Just curious, but do any of you give your pump a "quick spin" (a second or 2) AFTER a day on the lake to push any remaining water out of the pump bowl? Good or Bad Idea?
    Last edited by SNiC; 05-11-2014 at 06:34 AM.



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    Senior Member TNYoungblood's Avatar
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    Do not do it !!!!!! Several people will say its fine but it is not a good thing to do. JMO
    WFLC The REAL #321 Kentucky Drag Boat Association 2016 NJBA 10.0 High Points Champ

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    Senior Member k5-cj5's Avatar
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    Well, I think ill just stay clear of running it out of water. Not worth the risk, the lake is only a 15 min drive when its full. Thanks for all the input everyone.

  16. #14
    Senior Member TNYoungblood's Avatar
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    Quote Originally Posted by SNiC View Post
    Just curious, but do any of you give your pump a "quick spin" (a second or 2) AFTER a day on the lake to push any remaining water out of the pump bowl? Good or Bad Idea?

    A lot of it drains out goin up the ramp. It gets pretty cold here in the winter and I like to make sure alittle antifreeze gets to the bowl for winter storage to mix with the small amount of water that does set in the bowl.
    Last edited by TNYoungblood; 05-11-2014 at 07:56 AM.
    WFLC The REAL #321 Kentucky Drag Boat Association 2016 NJBA 10.0 High Points Champ

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