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Won't run with float valve on

We stored for 1 year, tried to start this spring, replaced float valve and cleaned carburator. Will run with float valve off, but will only run a few seconds with float valve on.

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Make sure when you put bowl back on carb the float isn't being jammed all the way up. if there is an o ring sealing the carb bowl shoud be no problem. don't know what type engine your talking about.

Posted on Apr 21, 2009


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I have an exmark hp yr 2000, 21hp kawa that's is hard to start due to carb is flooded visually when i take the air filter. and after it starts it runs exellent till i shut it off, when trying to...

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.
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Hi loneoaktrail...

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Normally there is a small indetion in the carburetor base and a small protrusion on the underneath of the float arm where the spring will be in the right postion for installation.
The spring will set in the indention and you will install the float arm with the needle/float valve and float rod into position over top of the spring,you will push down until it is in position and then you can tighten the screw that holds the float arm assembly in position.
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Free answer...Please rate me

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