dumb question...water related.
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dumb question...water related.

  1. #1
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    Default dumb question...water related.

    i finally got time to finish the boat up. when i was at home and i had everything finished up i fired up the engine and it ran good. then i took it to the lake put it in the water (still hooked up to the trailer though) and it started right up and ran for about 15-20 seconds and died then ran like crap and wouldnt run at all without the choke on. i am wondering if there is too much water running through the engine not allowing it to warm up? i have the through transom exhaust. do i need a valve to adjust the water pressure? another dumb question but there isnt a thermosdat is there? thanks guys i appreciate it

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    Default water

    You need a valve or water regulator jet pumps will make to much pressure for the gaskets to handle and it will leak by you intake gaskets and sometimes head gaskets i have seen it leak on the intake gaskets 3 times now on a couple of my buddies boats, put a valve on it the regulators a damn expensive all i had on my youngblood was a gate valve from ace hardware and it worked great. How big is your water dump hose you may not be geting rid of enough water either, but i would start by puting a valve on

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    Quote Originally Posted by matt wheeler View Post
    You need a valve or water regulator jet pumps will make to much pressure for the gaskets to handle and it will leak by you intake gaskets and sometimes head gaskets i have seen it leak on the intake gaskets 3 times now on a couple of my buddies boats, put a valve on it the regulators a damn expensive all i had on my youngblood was a gate valve from ace hardware and it worked great. How big is your water dump hose you may not be geting rid of enough water either, but i would start by puting a valve on
    olds or chevy for sure.....Ford should be fine wide open, thats what I have and been running it that way for years.
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    they are 2 5/8" hoses. ok cool, do i put the valve on the hose coming strait from the pump before the tee? should i put a guage on it? do you think a hardware store would have a guage? what should i pressureize it at?

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    tintingsandiego krusn56's Avatar
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    Quote Originally Posted by vwracin2win View Post
    they are 2 5/8" hoses. ok cool, do i put the valve on the hose coming strait from the pump before the tee? should i put a guage on it? do you think a hardware store would have a guage? what should i pressureize it at?
    What motor u got....and the gate should be the first after coming from pump, then t, then logs, then leaving logs to front area where water pump would be, then leaving t-stat area to snails....
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    Quote Originally Posted by vwracin2win View Post
    they are 2 5/8" hoses. ok cool, do i put the valve on the hose coming strait from the pump before the tee?
    yes. usually, they're installed right off the pipe or hose coming off the pump.

    Quote Originally Posted by vwracin2win View Post
    should i put a guage on it? do you think a hardware store would have a guage? what should i pressureize it at?
    first things first. with the boat tied to the trailer and barely running, even if you rev the engine up a bit, you're not going to generate enough cooling water to the engine to be concerned about pressure. something else is causing your problem in keeping it running, probably somewhere in the fuel system, and most likely the carb. or, you could have a lot of water in the gas...

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    Senior Member CK7684's Avatar
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    Not sure this is what the problem is though...especially this time of year

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    Senior Member ICECREAMAN's Avatar
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    Cold water isn't going to cause the poor running condition you are discribing. When you put it back on the trailor does it run better? Sounds like you may have a vacuum leak some where. If it runs good on the trailor but not on the water it's not a vacuum leak, but if it runs the same both on and off the trailor and you have to choke it to run sounds like you may be sucking air some where.

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    A boat will act that way if you have some water in your tanks.They run fine on the level, but when you back them down the ramp; the water can run back to the pick up tube in the tank. Put some heet or Sea Foam in your tanks. Check your carburetor bowls for water. Just a possibility. Duane HTP

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    Living in a cage of fear thatguy's Avatar
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    How steep was the ramp?

    One bowl flooded? One bowl starved?
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    Quote Originally Posted by Rexone View Post
    Tommy please remove all Jimsplace quotes from your sig and don't put more back. He doesn't like it and it is against the rules. Thank you.
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    it is a chevy 454. the ramp was pretty steep but i backed it down until the boat was floating on its own just connected to the trailer. i did see water in the fuel but i was just thinking it could be water pressure too because i noticed the intake manifold leaking a little. im going to fix the the fuel problem. when i bought the boat the guy said he couldnt get fuel to drain from the drivers side tank so i put a T-fitting in it and the passenger side was empty so i put fresh fuel in that one. im thinking i will plug the passenger side with fresh fuel and drain the drivers side and put new fuel. hopefully that might fix it. how do you determine how much water pressure to restrict? just start on the lean side and if the engine runs warm open it up a little? or do you guys run an in-line gauge?
    Last edited by vwracin2win; 06-12-2010 at 10:42 PM.

  14. #12
    Living in a cage of fear thatguy's Avatar
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    I don't restrict the water going into the engine, although some guys do.
    A lot of guys, including myself, put a pressure relief bypass in the line right out of the pump, set at around 12 PSI.
    I have a valve at the intake manifold to restrict the outlet water.
    By closing that valve a little bit, it holds the water in the engine longer, therefore building more heat, by opening it more, the water flow is faster, cooling the engine more.
    Any excess PSI over 12 lbs. is dumped overboard before going to the engine.
    (I need to install a gauge at the manifold to get it set just right still)
    I have 3 dumps. Engine outlet, bilge pump, and relief valve.

    The pressure bypass is in the picture below, near the back of the boat in front of the diverter pump. It has the T handle sticking up.
    Tommy
    Quote Originally Posted by Rexone View Post
    Tommy please remove all Jimsplace quotes from your sig and don't put more back. He doesn't like it and it is against the rules. Thank you.
    "So as through a glass, and darkly
    The age long strife I see
    Where I fought in many guises,
    Many names, but always me."

    Gen. George S Patton

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    Default jet

    If water is pressuring past the intake gaskets it will only run like crap when its backed in the water when it pressures up, i would just put some kind o valve or pressure relief before i messed with anything else, one thing at a time or you will be jumping around like a chicken with your head cut of and it will take you longer to figure it out

  16. #14
    Living in a cage of fear thatguy's Avatar
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    I would pull all the spark plugs and spin it with the starter before running it again, if not too late.
    Ask me how I know!
    Tommy
    Quote Originally Posted by Rexone View Post
    Tommy please remove all Jimsplace quotes from your sig and don't put more back. He doesn't like it and it is against the rules. Thank you.
    "So as through a glass, and darkly
    The age long strife I see
    Where I fought in many guises,
    Many names, but always me."

    Gen. George S Patton

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