Overspeed. Help! First Post

imboden

New User
Ok, first just quick about me:
39 year old firefighter, learning about these Ford tractors. I grew up driving grandpa's 1948 8N. About 2 years ago I couldn't do a thing to get it started. I eventually broke down and paid the local shop to fix it, they said the engine was shot.

so.... onto my next.

I bought a 1953NAA. About a year ago I started having problems with it running under load, or keeping the battery charged.

1. Switched to 12v
2. Paid to have the carb re-built
3. Converted points to electronic

All that said and done, today I got it to run!! Hooray!

Here is the trouble:

When I start it, no problem. When I try to increase the throttle the speed ramps up out of control and the RPM's go through the roof. I have to turn it off and start over.

At idle it sounds wonderful. Half throttle, it gets rough, any more than that and the speed runs away.

Any thought at all about where I can start?

My carb cables are connected in the right spots, the idle and main mixture are both turned out one full turn.

Thanks,
Pat
 

Sounds like a problem with the governor on the front of the engine that controls engine speed.

There should be a rod that goes from the throttle control to a arm on the governor and another rod from the governor to the carb. If this is connected correctly then the fly weights inside the governor are most likely sticking or have flat spots worn on them.
 
There aren't any carb cables.. Your carb butterfly is governor controlled, and the gov is hand throttle set.

Post a pic of your cables!
 
As sound says no cables but there is linkage that could be binding or a problem with a spring on the linkage or the gov has major problems
 
Wow, you guys are great!

It's 10 at night here, tomorrow with shop doors open and daylight I'll take a few pictures and see if I can post em up.

Yes cable was the wrong thing to say, it has two rods and linkage. One for choke and the other for throttle.

So if it's a problem with that gov. then I need to remove the body and belt and get in there?

I'll do some reading and see.

Tomorrow when I take my pictures I'll check and see if there is anything sticking and report back.

Thanks so much. I do lots of reading on here, I've just never created an account and posted anything.

I can work on stuff enough to get myself in trouble. The internet makes everybody an expert!
 
Didn't have time to tinker on it today, was busy doing battle with my F150 Power window.

Anyways, it sure all looks right. The rods are both connected at the right place on the carb. I had a tiny bit of leaky fuel, so I did take the time to tighten a few nuts. (fuel is off). Drained the bowl just to make sure I'm not getting a slow leak from the tank.

But back to the original question. The overspeed must be a problem with the Gov.?

What would be the proper way to go about fixing that myself?
 
Oh BTW my inclination is to:

Remove the throttle linkage rod from the carb
Start the tractor
Operate the throttle with my hand on the carb
See what it does!

If it behaves normally I guess that would tell me I have a problem with the gov.

Makes me a little nervous. I suppose I could block the rear wheels or jack up the back end so I don't get run over by accident.
 
I'll double check the model on the carb but I think that's right.

I did go out last night and start it with the linkage unhooked, operated the throttle from the carb, everything was perfect.

Hooked up the linkage and throttle control from the drivers seat was the same deal. If I move the throttle very very slow I can ramp it up a little, but it still wants to run
away.

How should I adjust my linkage?

Or are you guys thinking I need to go deeper?

Thanks much.
 

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