Motor flooding, and bogging down at top speed..?
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Motor flooding, and bogging down at top speed..?

  1. #1
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    Default Motor flooding, and bogging down at top speed..?

    My father and I took my boat out this eveing. After cruising about 4 miles we stopped for a bathroom break. After sitting for 5 minutes I tryed to fire up the engine with no luck. Sat there for a minute and tryed again. After 10 minutes of smelling gas we finally got it to fire up.. Then cruised a few miles and opened it up. When i pushed the gas all the way down the engine would bog down and begin to stall till i took my foot out of it and pumped the throttle a bit any idea? Maybe the carb need tweaking

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    Senior Member Futs's Avatar
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    needle and seat sticking and or float level is way to high or a sunk float.

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    Senior Member jimclauss's Avatar
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    Quote Originally Posted by ItsJohny View Post
    My father and I took my boat out this eveing. After cruising about 4 miles we stopped for a bathroom break. After sitting for 5 minutes I tryed to fire up the engine with no luck. Sat there for a minute and tryed again. After 10 minutes of smelling gas we finally got it to fire up.. Then cruised a few miles and opened it up. When i pushed the gas all the way down the engine would bog down and begin to stall till i took my foot out of it and pumped the throttle a bit any idea? Maybe the carb need tweaking
    replace it

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    Quote Originally Posted by Futs View Post
    needle and seat sticking and or float level is way to high or a sunk float.
    gunna have to google that one..

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    Quote Originally Posted by jimclauss View Post
    replace it
    Im broke as a joke with no punch line.. Prefer not too.

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    Senior Member Futs's Avatar
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    sunk float is when the float has a hole in it and is full of gas. the float wont rise to close the needle and seat and floods the engine.

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    Quote Originally Posted by Futs View Post
    sunk float is when the float has a hole in it and is full of gas. the float wont rise to close the needle and seat and floods the engine.
    Would that only happen when its running wide open? When it was idleign it smelled rich..

  10. #8
    Senior Member W.O.T's Avatar
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    Give The Carb A Good Cleaning
    Check All Fuel Lines For Leaks/Clogged/Pinched Etc.
    Clogged Fuel Filter?
    Water In Fuel?
    Check Fuel Pump
    Check Fuel Pressure
    Check Ignition Also Cap/Rotor/Good Spark.
    Last edited by W.O.T; 06-30-2011 at 11:07 PM.

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    I would check with GN-7 on the Dyno forum. Guy knows his carbs.

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    AKA OhOneWS6 Last Mohican's Avatar
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    I'm with Futs on this one. Check the simple stuff first. Needle and seat and the float. First and foremost check the fuel pressure at idle and WOT. Is it an electric or mechanical pump? There is a fairly large jet crowd in the DFW area that are more than willing to help another jet owner out. Nothing against PB. The help here is fantastic, just sometimes it's better to have someone actually put an eye ball on it.

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    Senior Member Hullshot's Avatar
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    Quote Originally Posted by ItsJohny View Post
    My father and I took my boat out this eveing. After cruising about 4 miles we stopped for a bathroom break. After sitting for 5 minutes I tryed to fire up the engine with no luck. Sat there for a minute and tryed again. After 10 minutes of smelling gas we finally got it to fire up.. Then cruised a few miles and opened it up. When i pushed the gas all the way down the engine would bog down and begin to stall till i took my foot out of it and pumped the throttle a bit any idea? Maybe the carb need tweaking
    sounds like it is running out of fuel and laying over on the big end?

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    Quote Originally Posted by Hullshot View Post
    sounds like it is running out of fuel and laying over on the big end?
    Yes sir, just took the fuel filter off. They look good, going to replace them though. Fuel lines don't seem clogged either. How would I check fuel pressure? My boats going 55 or at 3500 rpms..

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    Senior Member hellnback's Avatar
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    Default Someone say Oldsmobile ? ? ?

    well there's the problem right there ! you got to get it down to 45 mph @ 3500 rpm ..............

    seriously tho take the oil stick out and see if it smells like gas ... mine would sink the float and fill the cylinders with fuel ... not good for engine longevity.
    It may be OLD ,it may be Slow ... but at least it's MOBILE !!!

  16. #14
    Senior Member jet460's Avatar
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    Electric or mechanical fuel pump?
    What is the pressure when this occurs?

    I had a summit elec pump.
    The regulator screw on the pump backed out a little and the pressure went from a normal 5-7 psi, up to 14 psi and flooded my carbs.

    Tightened it back up.
    Problem solved.
    100 years from now, none of this will matter.

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