8N doesn't start

[CraigM]

It's a 6v tractor with front distributor.

Pretty cool how they use the resistor as a variable voltage drop. I wouldn't have guessed.

I'll check out those links. With a little luck, I'll be able to get out in the next few days and remove the extra wiring and get it all put back together.

 

[Soundguy]

itnwas a decent fix to 2 problems.. less than satisfactory coil design.. and a need for a lil more power at startup that automagically tapered off with no user intervention.. and no expensive relay to do some bypassing..

ford was all about simplicity..

soundguy

 

[GPintheMitten]

How goes the battle, Craig?

 

[CraigM]

How goes the battle? Funny you should ask because this very afternoon, we won....sort of. Rewired it. Discovered a short in the system, fixed it. All seemed in order so after a lot of cranking, we resorted to the nuclear option...a good shot of ether. That did it. It started. Fortunately, I was able to get the throttle down to idle before it self destructed. I should probably repost as '8N governor'.

The problem now it that the governor doesn't seem to be working. With the throttle 2 clicks above the bottom of the range, it sounded like it was going about fast enough. We clocked the PTO and found it to be about 450 RPM. Understand that's with the throttle set at about 10% of it's range of motion. We watched the governor links as we played with the throttle and they don't seem to be working. As I understand it, The gov should limit the engine speed when the throttle is advanced and then open the throttle as load is applied. I'm amazed at how little throttle deflection (at the carb) it takes to go from idle to nearly PTO speed at no load. The tractor must have an incredible amount of reserve when loaded.

Help! What next? Tear the gov off and clean out the gunk?

Looks like the mixture will need tweaked too as it will pick up speed if the choke is pulled out halfway, but that's a problem to deal with after the gov is working and I don't have to worry about blowing up the engine by overspeeding it.

 

[Soundguy]

reach down and manually goos the gov to carb rod and see if the gov fights you back.. NO? then rebuild gov.

there should be no slack, and no preload in the springs.

soundguy

 

[GPintheMitten]

Good job. I'm glad for you. That had to make your day.

Now on to the next problem.

 

[CraigM]

GP: It did make my day. Junior was grinning ear to ear the rest of the evening.

Soundguy: If I move the rod that connects the carb to gov, there is a lot of slop at the ball joint connectors. That would seem to be the reason for the long extension spring between gov and carb lever. It would keep the rod compressed. If I try to move the gov arm that connects to the carb, I get no sense of activity in the gov. I can push that arm toward front of tractor and the engine slows. The only force I feel is the short fat spring at the gov. If I push the arm rearward, it takes a lot of force. I can push it enough (maybe 1/8" at the end) to make the engine go from idle to full throttle (by ear). It makes no attempt to pull the throttle closed. On to the next problem as GP said.

Can I service the gov by removing the rear part from the generator mount bracket. Looks like 3 bolts and an oil line and the hemispherical housing comes off. Is that all there is to it? is there a gov rebuild kit, or what am I supposed to see or not see once inside?

Noticed that the engine runs better at idle with the choke part way on. There is a screw pointing to the side next to the carb neck. I'm guessing that's the idle mixture. Is it a normal needle as in turning it out enriches, or is it an air bleed that works backward?

 

[Soundguy]

the idle screw is an air needle.. in to enrich.. the main screw is the power needle.. out to enrich.

needing choke could be a power needle that is a tqad lean.. or a fuel obstruction.. or a vacume leak.. all of those situations like extra manifold vacume and the enriched fuel mix it brings with it.

if the gov don't figt... rebuild or replace it.. kits or new ones are available...

soundguy