1950 8n side mount stalling

[kenben]

1950 8n side mount dist.cuts out/wants to stall when going up hill.Runs well when
on flat ground.Gas tank is over half full??

 

[Eman85]

Do a fuel flow test. remove plug from bottom of carb and drain bowl. Open the fuel valve and time how long it takes to fill a pint jar.

 

[lastcowboy32]

(quoted from post at 13:23:44 06/30/23) 1950 8n side mount dist.cuts out/wants to stall when going up hill.Runs well when
on flat ground.Gas tank is over half full??

I love a good puzzle and making a guess, but throw a dog a bone.

Going uphill could mean a gravity flow issue with the fuel.

Could also mean the tractor is cutting out under load.

Since we are trying to diagnose from vague criteria, which I like to do anyway...

What happens if you pull the choke while going uphill and it's cutting out?

What happens on flat ground if you put a load on the tractor, like try to run something with the PTO?

Otherwise, your next response is going to be something like... buy all of the manuals, park the tractor in the garage and execute tests A, B, C, D... through X in accordance with said documentation...

 

[showcrop]

The carburetor is not controlled by the throttle it is controlled by the governor. On flat ground with no implement the governor will not open the throttle. When you start up a hill the throttle will be opened requiring a greater flow of gas.

 

[lastcowboy32]

(quoted from post at 15:43:47 06/30/23)

The carburetor is not controlled by the throttle it is controlled by the governor. On flat ground with no implement the governor will not open the throttle. When you start up a hill the throttle will be opened requiring a greater flow of gas.

Yes, but the hill represents a load to the ignition system as well.

Two things (among others) could be going on...

The governor is opening up, the tractor wants more fuel, can't get it and starts cutting out

or

The governor is opening up, the tractor wants more fuel, is getting more fuel, but the spark is too weak to burn it

(among other possibilities... some rats may have built a nest in the air intake, and it's not getting air)

That was why I was proposing an implement test or a choke test to try to refine between ignition or gas issues...

Of course, the pint jar flow test would be nice.
Testing spark would be nice.

But, sometimes, you can get a quick feel for what's going on by doing the uphill test, choke test, implement test... they don't require any wrenches and may tell you whether you want to explore fuel, air or ignition first.

 

[Abbby]

Do you know how to adjust the main jet? It may just need to be turned out 1/4 to 1/2 a turn. Pic shows where main jet adjustment screw is. Drain plug for fuel flow test is at bottom of carb.

 

[Btzj02]

(quoted from post at 13:23:44 06/30/23) 1950 8n side mount dist.cuts out/wants to stall when going up hill.Runs well when
on flat ground.Gas tank is over half full??

I had a similar issue Last year and it took me a while to narrow down the problem. Generally speaking my tractor would stall when under load. I did do the usual trouble shooting and did narrow the problem down to fuel flow. I did perform all the usual checks mentioned on this forum but the problem kept reappearing. After quite a while I was able to narrow down my problem to a sticking float. In the right conditions the float would stick against the wall of the bowl with the needle valve partially closed. Under heavy load the carburetor would starve for fuel and the 8N52 would stall. I bought a new float from this site, (the original float was from a previous rebuild and the float assembly was a little deformed), and all has been good since. I guess the point is systematically rule out one thing at a time and yes, having the essential manuals would make your job easier.

 

[Jim L WA]

kenben, you got some good suggestions so far. But in the future it would help to give us a little history. Like how long have you had this tractor. Is this a new problem or has it been doing this for quite awhile. also, what have you done so far besides checking the gas in the tank? If it's a new problem, it started right after I ....... or it just started on it's own.

 

[Nyquil Junkie]

Maybe someone could build a flow chart to repair this simple stuff on an 8N...

 

[Eman85]

Check fuel flow, check spark with a spark tester check compression. Those 3 things seem to be common and very hard to do.