"Running jetboat on the garden hose" question
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"Running jetboat on the garden hose" question

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    Off Road Badass Bonzen's Avatar
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    Default "Running jetboat on the garden hose" question

    Want to fire off the motor in the driveway for a maybe 5 minutes and check for fuel pressure/leaks. I have never really ran it on the hose and I don't know if you should turn the water on first and let it start to fill the block and then fire the motor or fire the motor first and then let the water in? I have wet logs if that matters. Thanks!
    "I'd love to help you out wags, but there is larger issue concerning breast cup sizes on another thread that we have to work thru first. This subject suddenly became a non issue." - GN7

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    Junior Member ronald.hogenkamp's Avatar
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    I let mine start running out the exhaust before I start it

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    Off Road Badass Bonzen's Avatar
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    Quote Originally Posted by ronald.hogenkamp View Post
    I let mine start running out the exhaust before I start it

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    10-4. I was wondering if the motor needed to be running to keep the water out of the exhaust ports.

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    Junior Member ronald.hogenkamp's Avatar
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    If you have log Style exhaust manifolds know if you had wet headers yes

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    Off Road Badass Bonzen's Avatar
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    Quote Originally Posted by ronald.hogenkamp View Post
    If you have log Style exhaust manifolds know if you had wet headers yes

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    Yeah mine are the log style with the internal water jackets cast inside them.

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    Junior Member ronald.hogenkamp's Avatar
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    Berkeley says don't run it more than a half an hour out of the water good luck

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    Senior Member ol guy's Avatar
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    Quote Originally Posted by Bonzen View Post
    Yeah mine are the log style with the internal water jackets cast inside them.
    Just unhook the drive-shaft first. I have always fired and then turn the water on. just to be safe and not run the pump dry. At that point you can run as long as you want to tune adjust carb, timing and check every thing out. JMLAO. M

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    Quote Originally Posted by ol guy View Post
    Just unhook the drive-shaft first. I have always fired and then turn the water on. just to be safe and not run the pump dry. At that point you can run as long as you want to tune adjust carb, timing and check every thing out. JMLAO. M
    Good advice.
    Running the motor with the pump connected helps nothing and the seals and impeller benefits by water lubrication.
    It's best not to run the pump dry.

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    Off Road Badass Bonzen's Avatar
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    I only plan on running it for 30 seconds max to just check fuel pressure and look for any fuel line leaks.
    "I'd love to help you out wags, but there is larger issue concerning breast cup sizes on another thread that we have to work thru first. This subject suddenly became a non issue." - GN7

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    If your only running for 30 seconds don't even worry about water

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    Quote Originally Posted by Bonzen View Post
    I only plan on running it for 30 seconds max to just check fuel pressure and look for any fuel line leaks.
    I know people do it all of the time, but how long does it take to run metal against metal to start galling, or running dry with rope or rubber seals to cause damage?
    I'm not even a jet guy, but it isn't something I would be comfortable doing.

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    Member 78hallett's Avatar
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    from Berkely's website

    Q: Can I run my pump while the boat is on the trailer?
    A: Running the Berkeley out of the water:

    A Berkeley pump can be run out of the water as it has a greased thrust bearing and lubricated tailshaft bushings. The impeller does not touch the wear ring, but due to the fact that the bottom of the pump is open during trailering the boat, it is best to run water into the pump through the nozzle while running on the trailer. The only issues with running out of the water is that after about 15 to 20 minutes the bowl seal can get hot from lack of cooling and cause seal damage. The packing gland may have to be re-tightened when the boat is used the next time as well.

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    Off Road Badass Bonzen's Avatar
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    Nice info. I still wouldn't do it for that long but it's good to know.

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    Senior Member BGMAN's Avatar
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    If you have log manifolds you need to start the engine before turning on the water. If you don't the logs will fill up with water and then pour into the cylinders with open valves and you will hydro lock the motor.

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