Running a jet in the driveway
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Running a jet in the driveway

  1. #1
    Senior Member fastnlight's Avatar
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    Default Running a jet in the driveway

    Is there any problem with running a jet boat in the driveway, in terms of damaging the jet pump? Of course cooling water would be applied via a hose line hooked up to the proper fitting cooling the motor and the jet pump. Someone told me its not recommended to run it out of the water, but not sure if this was true or not.

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  3. #2
    Senior Member johnf's Avatar
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    I'm not the sharpest tool in the shed, But if you take 20 minutes and disconnect the pump from engine via the driveline. Running the engine will not hurt the pump. Why chance it?

  4. #3
    Senior Member riverrat4lfe's Avatar
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    You will burn up your wear ring in your jet

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  6. #4
    21 Daytona Outlaw's Avatar
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    Quote Originally Posted by riverrat4lfe View Post
    You will burn up your wear ring in your jet
    Please explain this to me
    My wear ring doesn't touch the impeller
    If yours does something very wrong
    #55

  7. #5
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    Default Running your Pump

    Quote Originally Posted by Outlaw View Post
    Please explain this to me
    My wear ring doesn't touch the impeller
    If yours does something very wrong
    When a pump is assembled your have tolerance's that are tight but not making contact. You would have to assume that no damage would occur if the pump was run on the trailer. There are 2 area's of concern, the packing is water lubracated so this area will generate heat without water and the tailshaft area. On some pumps they use only water to lubracate this area so running this area dry can also cause damage. If you have to run the boat on the trailer , running water to the pump is a good idea espically if the pump has been used. Any sand that might be left in the pump will be rinsed away. The bottom line is that if you have to run the boat on the trailer for a long period of time, disconnect the driveline or take it to the water and run it on the trailer. Short periods of running will not, in my opinion hurt the pump but
    keep it short.

  8. #6
    Senior Member fastnlight's Avatar
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    Default Running boat on trailer

    Thanks for everyones's input.

  9. #7
    21 Daytona Outlaw's Avatar
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    Quote Originally Posted by greg shoemaker View Post
    When a pump is assembled your have tolerance's that are tight but not making contact. You would have to assume that no damage would occur if the pump was run on the trailer. There are 2 area's of concern, the packing is water lubracated so this area will generate heat without water and the tailshaft area. On some pumps they use only water to lubracate this area so running this area dry can also cause damage. If you have to run the boat on the trailer , running water to the pump is a good idea espically if the pump has been used. Any sand that might be left in the pump will be rinsed away. The bottom line is that if you have to run the boat on the trailer for a long period of time, disconnect the driveline or take it to the water and run it on the trailer. Short periods of running will not, in my opinion hurt the pump but
    keep it short.
    Good info Greg
    So the wear ring wont burn up.
    #55

  10. #8
    Senior Member fastnlight's Avatar
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    Default Previous thread on the subject

    Missed this one on my search. Interesting stuff.

    http://www.performanceboats.com/jet-...hose-home.html

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