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  1. #1

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    Running engine out of water

    On rebuilding engine, need to tune up out of water. as sea 150 miles away and no nearby places to put in water.

    whats the best way to do this !!!!!!


  2. #2
    ryandi2's Avatar
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    there is really only so much you can do with the ski out of water.. since you can only run it 2-3 mins on the hose and 10 seconds with out water.. but thats my opinion

    do a search and see what comes up though

  3. #3

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    i was thinking about, not to connect pump.

    put hose on inlet pipe from pump !!

  4. #4
    ryandi2's Avatar
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    well if you disconnect the pump you can run it longer.. but i would guess it would be hard too do any kind of tuning since the motor doesnt have a real load on it.. but im not sure..

    i might be wrong so i would wait till some one that is 100% sure chimes in

  5. #5

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    cheers m8

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by justfun View Post
    On rebuilding engine, need to tune up out of water. as sea 150 miles away and no nearby places to put in water.

    whats the best way to do this !!!!!!
    You can run it out of the water, but you cannot 'tune' it.

    The engine needs a water load on the impeller in order to do anything more than the most basic of adjustments.

    If the engine is in stock form, or close to stock, then set up the carbs according to the service manual. Set the idle RPM for roughly double the specified in-water RPM.

    If you remove the jet pump and drive shaft, you can run it for an unlimited amount of time on the garden hose (make sure the cylinders are evenly warm/cool while running on the hose), but it doesn't really buy you much, since you still don't have a load on the engine.

    After that, you need the hull in the water. You don't need much water to set the idle RPM, and check for proper throttle response. Even a small pond or river, just enough to back the trailer down and run the engine with the hull still strapped to the trailer.

    Service shops often have a test tank that they lower the hull into (without the trailer). Perhaps there is one around with a tank you can use.

    Otherwise, take the tools and such with you to the sea, and prepare to do the final tuning on, or beside, the water there.

    Adjusting for best carb tune at wide open throttle must be done on open water, as the impeller load is different at speed than it will be strapped down and stationary.

    Have you reviewed Watcon Randy's 'carb tuning for girls' posts?

  7. #7

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    yea its just basic adjustments, to check is runing ok , 300 mile round trip with the kids screaming to go on it, and dads messed it up. thats to much pressure

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