In Reply to: 1948 8n distributer adjustment posted by Nate on April 02, 2021 at 17:49:08:
6V or 12V?
Welcome to the camp! First time N-Owners need to invest in the ESSENTIAL MANUALS; they are the best tools to have on your bench. Next, don’t worry about model year. For any Ford N tractor, the important things are to know if you have a 6V/POS GRN electrical system (all FORDs were), or has a 12V/NEG GRN switch out job been done; is it a Front Mount or a Side Mount Distributor; 3-Speed (ALL 9N & 2Ns were) or a 4-Speed (ALL 8Ns were); and if it has POSITION CONTROL (all 9N/2Ns only had DRAFT CONTROL). Read manuals before doing anything. Avoid buying new parts and replacing them until old ones are tested and confirmed defective or not. ALL Ford components were designed to be rebuilt over and over. New parts are almost exclusively made in Cheena today and are junk.
Incorrect wiring is 99% of most non-starting issues whether 6V/POS GRN or 12V/NEG GRN. Just because you have a 12V battery or a 6V battery, does not ensure you have system wired correctly for that source. Don’t assume – verify with confirmed actual data. Go to the NTC HOW-TO’s forum under ELECTRICAL and search for wiring pictograms by JMOR.
Get the manuals. Get the Wiring Pictograms by JMOR. Get 75 Tips For N-Owners by Bruce(VA). Test coil. Verify wiring is correct. Verify distributor isn’t cracked as shown at tangs. Verify distributor timing is set correctly. Test unit before mounting. Mount distributor correctly. Test unit before firing up tractor. Follow these measures and I promise you will have a good running tractor. Get the electrical right first, then you can work on the fuel test.
One of the biggest issues on the Ford Front Mount is some do not understand how it functions and how it is set up correctly. First, the unit cannot be set and timed right while on the tractor. It must be removed and rebuilt on your bench. Once it passes, it gets mounted on the engine timing cover ONE WAY and if it gets off 180°, it will break and crack the aluminum base and render it junk. You’ll then need to pull the guts out and replace with a new or good used base. The cam/weights are offset as is the cam shaft on the engine and they must match up. There are also many other parts in the 8N front mount electrical system -Ballast Resistor, Coil, Plugs, Distributor, Generator, Voltage Regulator, Starter Motor, and more, and you must understand how each functions. A good battery is the first thing to verify. Have it tested at a shop. Whether a GEN or and ALT, you must maintain proper fan belt tension otherwise you will never charge the system correctly. The I&T FO-4 Manual and OEM Operators Manual are important tools to start with.
FRONT MOUNT TIMING PROCEDURE:
FORD FRONT MOUNT DISTRIBUTOR – WHAT HAPPENS WHEN INSTALLED 180° OFF:
POINTS: STANDARD IGNITION - #FD-6769X - DO NOT get the ECHLIN CS35 points.
ALTERNATES: CNH POINTS # 87744524 or TISCO # ATK 6FF
- If you pay more than $16 for a set of quality points, you are being ripped off.
FORD 8N TRACTOR WIRING DIAGRAMS:
FIRING ORDER, 1,2,4,3 CCW:
FORD 8N TRACTOR ESSENTIAL OWNER/OPERATOR/PARTS/SERVICE MANUALS: