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2520 Gas Starts Poorly

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Ken R

09-03-2002 09:51:46




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My 2520 gas is having a few starting problems and I'd apppreciate any advice.
(Please note: I have recently rebulit the carb and set it according to the Tech Manual. I have installed new plugs, wires, and electronic ignition. I have also set the timing with a timing light.)
Problem 1: When the engine is cold, there is a lot of unburnt fuel from the exhaust on startup. I seldom need to use the choke even on cool days in MN. Seems to get too much fuel, but it does start okay.
Problem 2: Once the engine is warm, tractor will not start. Have to pull the choke to get it started and there is a lot of smoke when it eventually does start. Once started, the tractor runs beautifully.
Any thoughts about either of these conditions? Could it be the fuel shutoff solenoid? Do I have the carb adjusted incorrectly? I would greatly appreciate any advice.
Thank you! - Ken

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Fred Bown

11-30-2002 14:38:31




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 Re: 2520 Gas Starts Poorly in reply to Ken R, 09-03-2002 09:51:46  
I also put a diesel starter right on my gas 2520 and it sure helped the dragy starter problem I didn't have to change a thing the frame is made for the longer starter the only problem it was a little costly



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Bob

09-03-2002 18:54:26




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 Re: 2520 Gas Starts Poorly in reply to Ken R, 09-03-2002 09:51:46  
The fuel solenoid closes off the "LOAD or MAIN" jet in the carburetor so the engine won't backfire or "diesel" when shut down hot, but the carb can still overflow internally if the inlet valve "needle and seat" is defective, dirty, sticky, or inproperly set, or if the float is defective or sticky.



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Larry

09-03-2002 10:12:11




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 Re: 2520 Gas Starts Poorly in reply to Ken R, 09-03-2002 09:51:46  
Ken, Surprisingly I was just going to ask the same question. I have had a replacement carb. on my 2520 and it started fine but surged some. Yesterday I replaced with a professionally rebuilt correct carb. It started perfect. I shut it off shortly then worked on a couple projects then went back to the 2520 and couldn't hardly get it to start. It was so loaded up with fuel once I got it going it smoked badly for a little while. I suspect the fuel solenoid. I thought you should hear it click when it shuts off fuel or possibly not a good electrical connection. Maybe someone can help us. My bet is the solenoid.

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Ken R

09-03-2002 10:46:38




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 Re: Re: 2520 Gas Starts Poorly in reply to Larry, 09-03-2002 10:12:11  
Thanks Larry. Glad to hear I'm not the only one suffering with this. I can hear my fuel solenoid 'click' when I turn on the ignition, but I have no idea if it's working properly. I also wondered if there's too much fuel in the bowl or if the float is not working properly. Let's hope someone has advice for us.
- Ken



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Bob F.

09-04-2002 03:57:53




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 Re: Re: Re: 2520 Gas Starts Poorly in reply to Ken R, 09-03-2002 10:46:38  
Had the exact same problem and symptoms on our 2520. We had 2 different John Deere Dealerships rebuild the carb. In both cases it was only a temporary fix. Out of ideas, and in frustration we finally put in an electronic ignition system. This helped considerably although it still starts harder than we think it should. I can't remember the brand of ignition kit that we used but I do remember that they were located in Ohio or Indiana. We got the kit through our local JD Dealer and it came with pretty good instructions and all the parts needed. Hope this helps.

Bob

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Ken R

09-04-2002 06:25:58




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 Re: Re: Re: Re: 2520 Gas Starts Poorly in reply to Bob F., 09-04-2002 03:57:53  
Yes, I have installed an electronic ignition already. I think it was a big improvement over the points, but it did not solve my "hot start" problem. I think I might have to remove the carb again and take another look at the float or needle valve.



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Fred Bown

11-27-2002 21:15:04




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 Re: Re: Re: Re: Re: 2520 Gas Starts Poorly in reply to Ken R, 09-04-2002 06:25:58  
To cure the starting problem on your 2520 put the old style up draft carb on it and your stating problems with be over the solenoid is the problem to keep it from dieseling just lower the idle and it will stop ok some times older is better



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