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Re: Float needle valve and seat are not sealing very wel
If it only does it when the tank is full I think it will be that the float needle valve and seat are not sealing very well and will need to be cleaned or replaced. If it does it all the time then I would say its down to the float height being incorrect.,
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This happens when the gas needle valve in the carburator sticks open. With it open, gas continues to flow into the carburator then into the cylinder and finally down into the crankcase. It can be caused by dirt in the needle valve's seat, a stuck needle or float. Most of the time you can remove the float bowl and flush out any dirt. If there's a lot you should consider flushing the gas tank and check your gas can for dirt. If the washer has been sitting for a long time the problem could be varnish is gumming up the carb works. Carb cleaner works well to flush that out. If the float, needle or seat is damaged you'll have to rebuild or replace the carb.
This is usually caused by the needle valve in the carburator being stuck open. It could be the float is damaged and doesn't float on the gas in the bowl or the needle is stuck open because of debris in the float bowl or the seat is damaged. If the needle doesn't shut off the flow of gas once the bowl is full, gas will continue to flow through the carb, into the cylinder and down into the crankcase.
Gas in the oil is usually indicative of a stuck float or needle valve in the carburator float bowl. If the needle valve is stuck open, gas will flow from the float bowl into the cylinder and then the crankcase even if the motor is not running. You should check that there isn't anything in the float bowl that prevents the float and needle valve from moving freely and that the needle seat isn't damaged or dirty.
If hose coming off carburator does not connect to anything then it is the over flow for carburator when float gets stuck and does not close needle valve causing excess fuel in carburator bowl and is drained automatically through vent orfice connected to hose that gas is dripping from. If this is the case then remove carburator bowl, check float, needle valve and o-ring in where needle valve goes. sometimes when carburators sit over winter with gas in them the gas breaks down and over time will gel/harden and cause float to hang up and o-ring for needle valve to deteriate and not sealing properly. clean and replace parts as nessesary. I hope this helped.
You need to take the float bowl off the carb from the bottom . You haven't given a lot of information about who did what to the carburator but somebody must have screwed with the float pisition for this to be happening . The way all carburtors work is the same you have the float bowl and the floats and on top of the floats is a valve called the needle valve. Now the neddle valve is there to stop the flow of fuel into the float bowl when the engine is not in a high damand cycle for fuel like start up or ideal the choke shuts the air off and gives more fuel at start up .However when the engine is running and the float bowl is being filled by gravity feed from the gas tank the floats will move up do to the amount of fuel in the float bowl and should shut the fuel from the gas tank off to the float bowl until the engine can burn the fuel and drop the float level enough to make the neddle valve open again to supply more fuel for the engine to run correctly its a never ending cycle . You need to adjust the floats and likely clean the carburator don't mess with adjustments there mostly automatic when the engine is running
You have a problem with your carburator.The problem is most likely the float, the needle valve ,or the needle valve seat. This isn't a difficult fix, you need to remove the fuel bowl under the carburator which is held in place buy a 1/2 inch bolt. There you will see your float, gently push up the float, it should be parallel with the upper section of the carburator. If not adjust float to make this happen. If float is off this is your problem, also float should not be full of gas, if so replace. If not we move on to the needle valve, remove pin that holds up your float and inspect your needle valve tip , if damaged replace. This could be your second problem,if not we move on to the third problem.The needle valve sits in a seat, it is about 1/4 inch round with a 1/32 inch hole in the center, top is flat, bottom is grooved. This seat can be removed with a pick tool. This problem can be fixed with carburator on the engine, but most of the time carburators are removed. You can do what ever you wish. I believe the problem is with your float adjustment , you can fix this quick and get mowing again. I am interested in how you make out. GOOD LUCK.
You have water in your gas tank or gas in your carburator float or a needle valve that isn't seated correctly. First empty the gas in your fuel tank into a clear container. If their is water ,you will see it with the gas. Second remove the bowl from the bottom of the carburator careful of the gasket, check for water in the bowl, clean bowl. Carefully remove float and needle valve. Shake float, listen for liquid inside. Check tip of needle valve for damage or corrossion. These three examples should be one or all of your problem. Clean and reinstall all parts. Add fresh gas and you should be ok. GOOD LUCK.
If you are getting fuel in the oil it can only be coming from one place. The float needle valve in the carburator is sticking open causing fuel to flow from the carburator into the combustion chamber, past the rings and into the oil. The only fix is to remove the carburator, remove the float bowl and the float. Remove the needle valve and clean the needle seat. Inspect the needle valve tip to see of it is damaged in any way. Remember while you are inspecting the needle seat that the smallest of particles can cause your problem.
you have a needle valve stuck open. i am not familiar with your model but if you can remove the float bowl and clean it out maybe replace the needle and seat and the float it should fix the problem good luck.