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Subject: Electrical

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Daniel Stackpoole    Posted 11-26-2019 at 06:09:00 [URL] [DELETE]        [Reply] [Email]  
  • Electrical
  • What damage could be done from trying to jump start a 6 volt system using a 12 volt jump? i have replaced the 6V battery since then but have no luck in starting the tractor, appears to have no spark at the plugs, any help would be appreciated

    K.LaRue-VA    Posted 11-26-2019 at 07:50:33 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Electrical
  • Do not connect a 6 volt battery and a 12 volt battery the way you would jump start two 12 volt vehicles. Just use the 12 volt jumper cables to run the starter motor. This takes the cranking load off the 6 volt battery, so sparks should be good. Make sure tractor is in neutral, turn ignition on, touch one jumper clamp to tractor frame, touch other jumper clamp to the electrical connection on the starter motor.

    Tim Daley(MI)    Posted 11-26-2019 at 13:30:49 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Electrical
  • Hey Jesse-
    An NTC post today about jumping a 6V from a 12V - I just wanted to be sure I have this right about jumping a 9N or 2N model with no solenoid…

    Hey Kevin-
    Yeah, I do it the other way too- jumper the solenoid first, touch metal like the running board second as it will spark. Then don't hold it for more than 10 second if it won't start. I didn't want to say this because I believe he has another issue with incorrect wiring and suggested he verify the system out before applying any power at all. He needs to check for spark and check for fuel flow then assess where to begin. We haven't heard from Dan so still don't know if it is a 9N/2N or an 8N or whatever. Jump starting a 6V/POS GRN 9N/2N starter with the 1-wire connection -the 9N/2N starter motor has no solenoid we know -and your car/truck 12V battery is like this: Source battery/vehicle OFF; tractor in NEUTRAL; connect the NEG (black usually) jumper cable from source battery to the starter motor single wire stud terminal; connect the POS (RED usually) jumper cable to the source battery. Ensure the tractor is in NEUTRAL and place the POS (RED) loose jumper clear of any tractor metal. Start your car or truck. Stand clear of tractor incase it jumps into gear or isn't in neutral when started. Apply the loose POS (RED)jumper clip to a metal part of the tractor but not near the battery. I use the seat or center housing. Touch metal and it should start. Some folks think the roundcan cutout on the 9N/2N tractor is the starter solenoid and they'd be wrong. If you attach the cutout to the 12V battery jumper it will short it out.

    Tim Daley(MI)

    Bruce (VA)    Posted 11-26-2019 at 08:18:41 [URL] [DELETE]        [Reply] [Email]  
  • Re: Electrical
  • " touch one jumper clamp to tractor frame, touch other jumper clamp to the electrical connection on the starter motor"

    That's backwards from how I do it.

    The last connection made will usually spark. If that is on the starter stud, you can easily melt the threads.

    That's why I make the frame to frame connection last.

    K.LaRue-VA    Posted 11-26-2019 at 20:10:20 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Electrical
  • Yep, agreed, I'll touch the frame connection last next time. Jump starting isn't something I do more than once or twice a year, and then it's usually trying to start some neighbor's junk that hasn't seen any maintenance in years. All my batteries are on maintainers, so dead battery just doesn't happen until a battery is truly finished. When I see a maintainer flashing trouble, go check connections. If the battery is really gone, buy a new battery next trip to town, charge it, swap it and that tractor is ready to go again. It's been years since I went to start something and it just went clikkkkk. The battery maintainers may increase corrosion of terminals. Can't say for sure, it could just be the extra damp weather we've had for the last couple years. I bought a big tube of no-ox to see if that works any better than those useless green and red felt things.

    Bruce (VA)    Posted 11-27-2019 at 10:04:35 [URL] [DELETE]        [Reply] [Email]  
  • Re: Electrical
  • Thank goodness for battery maintainers! Got them hard wired on everything around here. Oldest battery is now 12 years old.

    Bruce (VA)    Posted 11-26-2019 at 07:29:17 [URL] [DELETE]        [Reply] [Email]  
  • Re: Electrical
  • Front or side distributor?

    The only damage that will be done from a 12v jump start to a 6v tractor is to yourself if you do it incorrectly.

    See tip # 43.

    Follow the wiring diagram Tim posted to find the cause of no spark.

    Tim Daley(MI)    Posted 11-26-2019 at 06:25:57 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Electrical
  • Dan-
    Welcome to the club. I’d advise that you also should let the reader know what you are talking about as far as tractor model it is you are dealing with; is it a 9N/2N or an 8N or something later? Next, you have something else wrong with yours and I wouldn't try to jump start anything until you determine what is the root cause problem and fix it. The 8N and up models can be jump started with a 12V to a 6V system using the starter motor solenoid. The 9N and 2N have no solenoid. Just because you have a 6V battery does NOT mean you have the entire wiring system correct. Try this first: Go to our HOW-TO's forum ( see LINK ) and search for ELECTRICAL subcategory. Scroll all the way down and find "WIRING PICTOGRAMS BY JMOR" and open the pdf document. You can save it to your PC and use it for reference. Find you setup based on model and system. Disconnect the battery. Trace the entire wiring system of your tractor using the Pictograms and determine what is mucked up and fix it. Only then you can connect the battery and test the system. Follow this archived LINK about jumping and click on the '75 Tips For N-Owners’ from Bruce(VA) and download a copy as well for yourself -they are both free. ...from the HOW-TO's forum, top red menu bar on HOME page:


    *PICTOGRAM courtesy of JMOR


    Tim Daley(MI)

    John in Mich    Posted 11-26-2019 at 06:14:02 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Electrical
  • IF, you have no spark with a new battery, you need to check with the rest of the electrical system with a multimeter.

    John in Mich    Posted 11-26-2019 at 06:12:58 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Electrical
  • I have done that often. For the tractor to start it must have 6 volt source properly connected in the tractor.
    The key is to NOT put 12 volts onto a 6 volt battery. Put the ground of your source onto the ground of your tractor or somewhere on the tractor that has good metal to metal contact for ground.
    Take the 12 volt source "Hot" directly to the starter post. All this does is turn the engine over faster.

    Island Mike    Posted 11-26-2019 at 06:11:09 [URL] [DELETE]        [Reply] [Email]  
  • Re: Electrical
  • We did it often with the old Ford V8s. The starter motors can handle 12 volts, but the coils will probably get upset, if subjected to 12 volts for too long.
    But it sounds as if you have a problem somewhere with the spark.

    Island Mike.

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