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Subject: 9n timing

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Ed Pierrot    Posted 10-31-2018 at 08:41:11 [URL] [DELETE]        [Reply] [Email]  
  • 9n timing
  • I am having some power issue with my 1943 9n (2n) and a guy that rebuilds older tractors stopped over to offer advice. He said I needed to adjust length of the governor/carb. linkage and to retard the timing a little. I had it slightly below the center to center mark, would retarding more mean going further below the mark or going above the center mark?

    Farmer Dan    Posted 10-31-2018 at 09:22:04 [URL] [DELETE]        [Reply] [Email]  
  • Re: 9n timing
  • He must be a John Deere mechanic. Put the timing back where it should be, clean and adjust the points. then clean and adjust the carburetor. Not sure what you mean by power issues this is only a 19hp machine.

    Ed Pierrot    Posted 10-31-2018 at 11:06:53 [URL] [DELETE]        [Reply] [Email]  
  • Re: 9n timing
  • I already did all the obvious things that you mentioned and I found the info I was looking for by doing a topic search here. As far as power goes, if the wheels hit any obstruction it would stall.
    Not sure if the guy was a JD man or not but he was right on the money with his advice. I retarded the timing about 3/4's of a notch and lengthened the governor linkage about 1/8" and it has all the balls I could ask for. I have driven a few 8n, so I knew there was an issue somewhere in the adjustment because this thing has been a total rebuild.

    JMOR    Posted 10-31-2018 at 13:00:02 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 9n timing
  • maybe the gov adjustment, but 1 1/2 degrees of timing didn't change any performance! Regardless of adv/retard.

    Ed Pierrot    Posted 10-31-2018 at 18:14:07 [URL] [DELETE]        [Reply] [Email]  
  • Re: 9n timing
  • Well I was on the advanced side of the center mark and moved it the same amount on the retard side of the center line. I drove the tractor and it made a difference, if adjusting it won't make a difference why would it have timing marks or for that matter why isn't it bolted solid? I read a quote on here "Henry Ford was a cheap SOB and he didn't put anything on his tractors that wasn't needed"
    I also converted this tractor to a 12v and installed a electronic ignition so I didn't have to deal with points.

    Tim Daley(MI)    Posted 11-01-2018 at 08:18:07 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 9n timing
  • I don't believe your carb and/or governor are the true root causes. Is you battery fastened down? Keeping the battery secured is often overlooked by fellas. It's fine when the tractor is stationary but as soon as it is working in the field it will bounce all over and possibly create a shorted cable or wire. I think you answered your own question with your electrical switchover job. Look at wiring to be correct and for shorts.

    Tim Daley(MI)

    Ed Pierrot    Posted 11-01-2018 at 07:57:17 [URL] [DELETE]        [Reply] [Email]  
  • Re: 9n timing
  • Maybe I should reword this, the magnetic pickup was out of position or if they were points they were closing prematurely. when I adjusted the the position of the distributor the spark plugs were being fired when the piston was in the proper position to produce optimum power.

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