Question about Harley Davidson Harley-Davidson Motorcycle Desktop Telephone

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GAs is leaking out of the rubber boot on bottom side of the carb.

When I throttle it up, gas comes out of the "rod" that goes into the butterfly throttle control.

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  • timothyjones May 11, 2010

    accelerator pump; get a carb rebuild gasket kit and get intimate with it; if you are leaking there it wont hurt to clean up and rebuild your carb...T

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You may have a float issue but more likely an intake leak hows your air filter

Posted on Jan 15, 2010

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You sure it isn't coming from the accellerator pump? Shouldn't really be any gas that could get out through the butterfly rod.

Posted on Aug 20, 2009

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1 Answer

Gas leaking from diaphragm rod boot


Replace the diaphragm and the super small 0-ring at the bottom of the accelerator pump housing. Easy job, three screws after you remove the carb. You don't have to remove the cables to do this!

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My 1986 nissian d21 pickup starts up fine but shuts down immediatly after letting of the gas


It is possible that you have a vacuum problem. There could be hundreds of other causes, but start at the beginning and check for a perished rubber vacuum pipe.
Vacuum leaks could also occur between the carburetor and the intake manifold, but on a '86 model, just for fun check the play on the butterfly valve shaft.
Your car is 28 years old, and the butterfly shaft tends to wear out from years of acceleration and deceleration (throttle valve movement). If you do find excessive play on the butterfly shaft, you probably need to have the carb overhauled, or possibly less expensive, have it replaced.

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Have mculloch fr 44 gas trimmer wont start check plug gas pulled apart carb wont start when trying to start gas comes out muffler


If there is a large excess of fuel in the crankcase it may well be the carb needle leaking, the only way to check this is with a bulb pressure tester connected to the fuel inlet nipple, it should hold a pressure here if the needle is not leaking, if you cannot get a pressure then the needle is leaking, it can be replaced, it will have a rubber tip, also make sure on the metering side of the carb the gasket goes on first followed by the diaphram and cover, the gasket acts as a spacer.

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I started the bike and was at full throttle when running but throttle was not sticking maybe floats stuck,so i took carb off cleaned it and put it back on know bike won't start at all ,i have spark going...


Are you certain the throttle butterfly or slide (depending on what model bike you have) is seated...if the actual throttle in the carb throat is not closing, starting bike cold will be very difficult as you are feeding in too much air.

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1988 ford tempo seems to stall when the gas petal is pushed, then catches up. Clean air filter and fuel filter. good plugs, wires, rotor, distributor cap.


CLEAN THROTTLE PLATE HOLD IT OPEN AND CLEAN WITH CARB SPRAY ON A RAG AND IF YOU HAVE AN OLD TOOTHBRUSH THAT WORK GREAT ALSO (THROTTLE PLATE IS WERE THE AIR TUBE FROM THE AIR FILTER GOES) ITS A BUTTERFLY THAT OPEN AND CLOSES WITH THE GAS PEDAL

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1 Answer

I need a diagram of a 4 barrel carb. i don;t know what a mixture screw adjust butterfly position and float level means.


The mixture screws are at the bottom front of the 2 front barrels. They poke into the barrels from outside the carb.
Butterfly usually refers top the throttle plates that open and close the barrels, but if you have a quadrajet, they may also refer to the upper plates on the back 2 barrels that only open when the throttle is wide open.
The float level is the distance of the top of the float when the float valve is closed. As gas flows into the bowl thru the float valve, the float rises and eventually closes when the proper float level is reached by the gas.

Look here for example: http://www.holley.com/data/Products/Technical/199R8339.pdf

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1 Answer

After the mower runs for a while the throttle starts going up and down


Most of the time when this is happening there is trash in the fuel tank and when the gas gets low the pickup tube sucks it up blocking fuel flow. The tank needs to be cleaned out. When you empty the tank of its gas do not pour it back in the can, you're just dumping dirt in your clean gas.
Second cause is the diaphragm in the carb has developed a small tear in it and needs to replaced. Most of the Briggs and Stratton engines on push mowers these days use a small plastic carb with a prime bulb on the side mounted to the gas tank . Rebuild kits are inexpensive costing 3 or 4 dollars and usually include directions that are easy to follow with PICTURES. (Trust me, even I like pictures to help remember how that pesky linkage goes back on) If you are cleaning the tank it is just a few more steps to rebuild the carb so grab a few simple wrenches, a philips screw drive, a can of carb cleaner and go to it. And one last thing. On the carb where it slides on the intake there is an o ring with a plastic washer. Rubber o ring goes next to the carb side and backup washer goes on the engine side. Use a dab of motor oil on the rubber ring to make sure it slides on without binding.

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2 Answers

Engine continually has high idle, wont kick down. also the choke light comes on when not pressing on the gas and makes an anoying sound. but only when not pressing the gas. what could this be? other than...


try getting a can of carb cleaner . removing breather and spraying gunk out of the inside of carb to free moving parts that are sticking. and also try spraying the outside moving parts of carb with penetrating oil

Jan 09, 2010 | 1986 Pontiac 6000

1 Answer

Wide open throttle when idling


shut it off and pull over so tried restarting it and immediatly it started revving outta control. so i shut it off.(i noticed a lil gas comin outta the far right carb.) the throttle won't snap back but i can force it back and i see the cable moving the butterflys open and shut (to the point where the tension on the throttle cable is released)but it won'd stop the revs. now i can't start it without having to turn it off cause it revs til redline. any ideas on what to look at first??? thanks.That would just continue to let gas go into the carb. Without air getting into the system that's not going to be the issue. So if the butterflys are closed and it's still reving like crazy then it's getting air from somewhere. Check to make sure all your vaccum lines are hooked up well and that there aren't any cracks in these lines or the carb boots. Make sure the carb boots are tightened well.,,

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1 Answer

93 honda accord howling noise coming from engine


hi try taking the air filter pipe off the throttle body see if the butterfly spindle has no play in the spindle or the retaining screws that hold it to the spindle have not come loose just put your finger on the butterfly while its idling see if the noise goes if not just pinch the vacuum hose on the vacuum box see if noise goes or changes pitch yates210456

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