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Garden Tractors Discussion Forum

JD 111 won't pick up load cold

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leon

11-23-2004 18:28:23




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My old JD 111, vertical shaft single cylinder Briggs, just won't pick up load until the engine is thoroughly warmed up. Spark looks good. I've thoroughly gone through the carb - several times!. Put in a new throttle shaft but the holes are a bit egg shaped so I washered the ends - no binding but shouldn't leak much now. Raising the float level seemed to help a bit. When it dies while trying to pick up load, it's a bugger to start again. It seems flooded. Air filter is OK. Control rod from governor to throttle seems to be moving OK and it's compression is OK.

Anybody experienced this same thing? Got any more ideas. Snow blowing time approaches!

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stronics

11-25-2004 17:02:46




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 Re: JD 111 won't pick up load cold in reply to leon, 11-23-2004 18:28:23  
Leon,
Some of these can be baffling for sure. Try setting the spark plug gap closer than what they recommend maybe .022 and see if that helps and make sure it's a good plug. Some are bad right out of the box.
David



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lee

11-24-2004 13:30:07




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 Re: JD 111 won't pick up load cold in reply to leon, 11-23-2004 18:28:23  
You are basically saying all is OK and yet it does not run correctly. You will have to change your approach to fix it. Do a compression test and compare to specs. If compression is OK, the problem is ignition or carburetion. You you don"t say what"s been done to the ignition if anything. Myself, I don"t usually try to pin-point the problem to fix these engines. I just do a complete tune-up. I would probably install new points, condensor, and spark plug to start with if this has not been done. Points gap must be correct as that controls the ignition timing. You could upgrade to a magnetic ignition pick-up in lieu of points. Kits are available. The coil is still suspect if it is original and as old as that tractor. But hold on that for now if the spark is good and go back to the carb. You say you"ve been thru the carb but don"t say what you"ve done. Strip the carb completely removing all the jets. Soak all parts 24 hrs in Berryman Chem-Dip carb and parts cleaner. I like Berrymans because it"s good stuff. I think it"s $15 for a galllon soaker. The cheap stuff doesn"t work. Wash all the parts with hot water and detergent after soaking. Rinse in hot water and blow out all orifices with compressed air. Set the low speed (air) adjustment at 1 turn off seat. Set high speed jet at 1 turn off seat. Start and run til up to temperature. Set throttle idle stop to run slowly. Adjust air screw in/out for best running. (in is richer, out is leaner, this is opposite of high speed screw.) Open the throttle lever to wide open (governed speed) and adjust the high speed screw for best running. Out on this screw makes a richer mixture. If all this works it should be fixed. If none of this works, replace the coil. If that doesn"t work, replace the carb. Most cases if the carb is not damaged it is just a simple matter that it is not clean.
You need a good soak and compressed air to clean it.

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lee

11-24-2004 13:35:45




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 Re: JD 111 won't pick up load cold in reply to lee, 11-24-2004 13:30:07  
The float level must also be set correctly on these or they don't work right. You may have to find the spec for it in a manual. Often times if it is a flat bottom float it will set parallel to the main body when upside down with the bowl off.



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stronics

11-24-2004 03:34:22




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 Re: JD 111 won't pick up load cold in reply to leon, 11-23-2004 18:28:23  
Like you say it is carb problems. I'd go to the library and get a good book on fixing that model engine for a reference.
I have the same engine and the carb settings are critical to it to perform right.
Are the idle and main jet needles in good shape? I've seen some that were hand filed and wouldn't take adjustment.
If I was there now I'd try adjusting the main jet once it was warmed good and make sure the needle valve the float moves is new and the seat is good.
David

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leon

11-24-2004 04:08:58




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 Re: JD 111 won't pick up load cold in reply to stronics, 11-24-2004 03:34:22  
Been there, done that with the load valve. The float valve is good, doesn't leak, yet opens up when it is supoposed to.



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