450 Update

[FarmallLovinGuy]

Well, I checked a few of the things mentioned on another post: looked at the air cleaner, plugs, distributor, and changed the plug wires. Still
heard the noise (it kinda sounded like a JD 2 cylinder, it was just running rough). Hooked up to spread some fertilizer, and it worked fine the first
couple passes. Then, the tractor began to sputter, like it was out of gas. It then died. Started it up and kept going, then it sputtered and died
again. Happened about four more times, with increasing frequency. Each time, I kept thinking it was out of gas. Finally finished then got it home
(barely). Any ideas? Thanks guys

 

[fastfarmall]

Did you happen to lay your hand on the coil,to see if it was hot.

 

[Adrian Billheimer]

As was mentioned earlier, maybe some dirt broke loose in the gas tank, look in the fill hole with a good flashlight, you might have a piece of crud floating around and sometimes blocking the drain hole thus stopping the flow of gas.

 

[cornerpost]

Hate to throw parts do you have another tractor same coil to swap out?

 

[old]

Sound like what my BA did a couple years back. I found there was a couple of leaves in the tank that would get sucked down and plug the fuel flow. When it died the leaves would float up enough because the gas flow was not needed and run for a bit then do it again. Took a bit of looking but finally saw them and fished them out

 

[D beatty]

If you have problems with stuff floating around in tank clean it and put one of these screens on sediment bowl shut off valve of tank.I have them in all my tractors but one and the first time I have to drain tank it will get one.

 

[OldFarmall450]

My 450 is a 6 volt, has a 12 volt battery on it for cranking. I was told it was a 12 volt when I bought it. I wanted to replace the coil so I bought a 12 volt like the one you bought. The tractor immediately started running horrible, hard to start, missing, sputter and die. I spent 2 months scratching my head and cleaning things up, the carb, gas tank, you name it. I took the starter to the shop and was told it was a 6 volt. I pulled the new 12 volt coil off and put the old 6 volt coil back on. It runs like a charm. Maybe this'll help you.

 

[Charlie M]

My 300U acted like that - found stuff growing looked like mold in the screen at the carb. Have you pulled the plug on the carb and let the gas run for a couple of minutes?

 

[FarmallLovinGuy]

Mine has a 12 volt battery and an
alternator, but the problem only
arose after replacing the coil. I'm
not sure how to tell if the old coil
was 6 or 12, but it looks like it is
likely the original, so I would
guess a 6 volt. I'm going to get a 6
volt coil and see if it works.

 

[FarmallLovinGuy]

I've looked in it already, but I'll be sure to take a closer look with a better light to try to eliminate this as a possibility

 

[FarmallLovinGuy]

It was pretty warm after running it for a while, yes

 

[AlinMO]

I'm jumping in late, but almost all the early 12 volt systems required a ballast resistor for the coil. Even if 12 volt coil, a resistor was needed. The old popular Dodge 60 - 70's ceramic resistor was everywhere. The resistor dropped the 12volts to 6 for the coil. It started on 12 volt but dropped to 6 once the start key was released. Does you 12 volt coil state no resistor required?

 

[OldFarmall450]

(quoted from post at 10:36:18 06/02/17) Mine has a 12 volt battery and an
alternator, but the problem only
arose after replacing the coil. I'm
not sure how to tell if the old coil
was 6 or 12, but it looks like it is
likely the original, so I would
guess a 6 volt. I'm going to get a 6
volt coil and see if it works.

Was your old coil bad? I thought mine was, but after trying the 12 volt I thought anything would be better than that. So I dug up the old 6 volt coil and installed it. The results were immediate and much better. I'm still using the old coil, I guess there wasnt anything wrong with it to begin with. I also put the fuel tank filter in that was suggested. It's a great idea.

As far as cleaning the fuel tank I just took it off used a pressure washer and wash the crap out of it. It was shocking the amount of crud that came out of that fuel tank.

 

[rustyfarmall]

(quoted from post at 22:12:01 06/01/17)
My 450 is a 6 volt, has a 12 volt battery on it for cranking. I was told it was a 12 volt when I bought it. I wanted to replace the coil so I bought a 12 volt like the one you bought. The tractor immediately started running horrible, hard to start, missing, sputter and die. I spent 2 months scratching my head and cleaning things up, the carb, gas tank, you name it. I took the starter to the shop and was told it was a 6 volt. I pulled the new 12 volt coil off and put the old 6 volt coil back on. It runs like a charm. Maybe this'll help you.

ALL ignition systems are 6 volt. Even with a 12 volt battery, the ignition is STILL 6 volt. A 12 volt coil STILL requires a ballast resistor to drop the current to 6 volts. IF by chance the coil you bought is a 12 volt, internally ballasted coil, then it should be labled, "no external resistor required".

Since your 450 is already converted to 12 volts, then it would already be equipped with the external ballast resistor, and installing the internally ballasted coil would drop the voltage significantly, resulting in a VERY weak spark. Replace the coil with a common ignition coil and all should be well again.

 

[BarnyardEngineering]

(quoted from post at 10:38:40 06/02/17) It was pretty warm after running it for a while, yes

If the coil was only "pretty warm" that probably isn't your problem. Bad coils are too hot to touch, generally speaking. They also take some time to cool down. The tractor won't start right back up.

Sounds like you might have a floater in the tank. It will suck down on the fuel outlet and block flow, then float away when the tractor dies and fuel flow stops. Then you can run it again for a while until it sucks back down on the outlet again.