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Carburator Overfueling Engine. Clooney??

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AWB

12-06-2002 05:59:58

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I had the carburator on my John Deere LA overhauled. No matter how the adjustment screw is set it still overfuels the engine . The engine sounds like the choke is left on. The repair kit used was a John Deere Kit. The engine has approximately 5 hours run time on it since being re-manufactured. The float level was set according to instructions in the Tractor Operators Manual. Any help I can get to correct this problem would be greatly appreciated as the tractor is scheduled to be in a parade on Saturday December 14. Thanks, AWB

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Mark

12-06-2002 07:04:45

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Re: Carburator Overfueling Engine. Clooney?? in reply to AWB, 12-06-2002 05:59:58

I had the same problem with my Model �L�. I had the carburetor professionally rebuilt with a new larger throttle shaft to stop leakage but still had the same problem. I think these tractors have a tendency to run rich and it is particularly difficult to get them up to operating temperature or even know if they are up to operating temperature for that fact. I tried the usual things including air filter blockage and advancing the timing slightly but still had the same problem, even after running for an extended time in 90 degree weather. After only 30 minutes of running the spark plugs were covered with soot. I notice that about 10 seconds after the fuel was turned off the engine would start running smooth, the idle speed would increase and the black smoke was drastically reduced.

I then took Mr. Clooney�s advice and connected a clear plastic tube to the carburetor drain plug and attached it alone side the carburetor, being careful to keep the tube away from the exhaust. I started the engine and noted the fuel level while the engine was running (or should I say choking). I then turned off the fuel and again noted the level when the engine ran normally. I also noted the level when the engine died. I don�t remember exactly but I think the smooth running mark was about � of an inch below rough running mark on the tube. I then adjusted the float level until the fuel level reached my smooth running mark on the tube. So far the tractor has been running very well. Good luck!

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Clooney

12-06-2002 06:52:30

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Re: Carburator Overfueling Engine. Clooney?? in reply to AWB, 12-06-2002 05:59:58

AWB, first try running it with the air cleaner disconnected, if that helps you have a restriction in the air cleaner or air intake system.
~Then pick the worst offending RPM & try closing the fuel shut off down to almost closed, keep turning it down & let it run until the fuel in the carb is used up. You will have to fiddle with it a while, but if you CAN make it run better by doing that you have a carb problem yet. If it's a carb problem call the person that rebuilt it for the action he wants you to take. [if you start taking it apart it might not be covered under the warranty]. If the problem is in the carb it is probably due to an incorrect float level, fuel logged float, plugged air bleed or something installed incorrectly.
~If you can't get it running better by shutting the fuel down to almost nothing then look for late ignition timing, valves out of time or weak spark or ?
~I haven't done much with that little M/S TSX carb used on the LA in years so you might try E-Mailing the Ridenour's [email protected] or calling @ [513-988-0586]. They are the L & LA experts.....

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