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1944?? JD A Hard to hand start

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Gary

12-06-2001 21:28:28




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I have a 1944?? all fuel styled JD A that is extremely hard to hand start. I have went down the process of elimination including: new points, plugs, professionally rebuilt carb, fresh high octane gas, added a small amount of octane booster, adjusted the timing forward and backward. I have tried choking the carb, half open and open all the way. The tractor will fire almost every time and has excellent spark. Even after choking the carb, the plugs are dry. The carb has been bench tested and appears to be operating correctly. When I use another tractor to pull start it, it starts every time within 3 or 5 feet and runs perfect. It appears to me as if it isnt getting enough gas while hand starting it. Are there any other things I can check or adjust before I have the headwork done and the rings replaced? Keep in mind that the tractor does start and runs very good when I pull start it. Thanks for ANY suggestions.

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Dave K. (Fl.)

12-09-2001 13:51:21




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 Re: 1944?? JD A Hard to hand start in reply to Gary, 12-06-2001 21:28:28  
I'll just add my two cents to what has mostly been said already. I have an electric start A and when the impluse spring went bad in the mag she would just not start either. Could pull it and would start right up and run fine. So be sure and check for the "click" when you crank it over!

Dave



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Deere2931

12-07-2001 07:13:56




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 Re: 1944?? JD A Hard to hand start in reply to Gary, 12-06-2001 21:28:28  
Gary if mag checks out then Clooney is right on.
Case in point; a friend had a A that did exactly like your tractor, you could hand crank till the water boiled, but no run. Pull it, bump the clutch and it started right up. When we tore it down we found that some one had bored it out to 45 over and put the standard pistons and rings in. Yep not much compression there. Not saying that is what you did, but it backs up what Clooney was saying. Follow his advise. (ALWAYS).
Only you know how the ring job was done, maybe a good hard days runing may help it to seat rings, might be worth a try, think we baby them a little to much after doing engine work. Can tell you some real life stories on this subject.
Best of luck and hope its just the mag.
Bob J.

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Larry W.

12-07-2001 06:37:33




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 Re: 1944?? JD A Hard to hand start in reply to Gary, 12-06-2001 21:28:28  
I agree with Mr. Clooney. It is more than likely you are not sucking up enough gasoline into the cylinders. With my hand start B, I find that by opening up on the idle screw a 1/2 turn or so it seems to help. Also, I choke it a little extra longer than the electric starts. If compression is low, they can be a real bugger. My B has new rings, and compression is real good, but if I open the pidcocks all the way, it is hard to start. I just open them now to see if I have flooded it. It takes a little while to learn how each one likes to be started. They all have their own personality it seems and sometimes I think I should keep "How to Start" notes on each tractor.

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Clooney

12-07-2001 06:02:18




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 Re: 1944?? JD A Hard to hand start in reply to Gary, 12-06-2001 21:28:28  
Gary, the mag clicking was good advice. If all ok with the mag you might run a compression test on it cold,those all-fuel engines have low compression to begin with & if the rings are leaking due to wear or being loose in the pistons you will have even lower compression during slow hand cranking. The fact that the plugs are dry during hand cranking kind of points to poor compression during cranking or a malfunctioning carb choke. You might try to open the idle needle 1-2 extra turns during cranking & see if that helps, it might be worth making sure the choke is closing completely & if it the choke plate has a little spring loaded trap door, that it is there & closed. The next thing is to get rid of that Premium gasoline & octane booster & use regular gasoline as lower octane gasoline ignites easier in a low compression engine. One thing I have found that helps starting on engines with ring wear (low cranking compression) is to add a small can of 2-cycle oil to each 5 gallons of gas added as that leaves some oil on the cylinder walls & rings for a better seal at cranking speeds. One last thing is to shut the fuel off & run it out of fuel at shut down, don't stall it or choke it to shut it down as that washes the cylinder walls of oil.

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Gary

12-07-2001 05:15:29




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 Re: 1944?? JD A Hard to hand start in reply to Gary, 12-06-2001 21:28:28  
I may be in a little over my head here, but I had the same problem with my "B", and it turned out to be a broken impulse spring in the magneto. It would start right off if pulled, but I could yank all day on the flywheel and nothing would happen. You can tell if that's the problem because you won't hear that little "click click" in the mag when you crank it over.
Just one more thing for you to check. Good luck.
gary

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Pappy

12-06-2001 22:03:07




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 Re: 1944?? JD A Hard to hand start in reply to Gary, 12-06-2001 21:28:28  
From my experience, I would start looking for a weak coil, either in the magneto or distributor, whichever it has. (Most likely a Mag.)Pull starting turns it faster and delivers a hotter spark.



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DJ

12-07-2001 05:06:11




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 Re: Re: 1944?? JD A Hard to hand start in reply to Pappy, 12-06-2001 22:03:07  
I agree with Pappy. My A did the same. Rebuilt distibutor did the trick.



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