TO20

Gary Mitchell · Jun 16, 2017

Buddy has a TO20 that has set out a few years and wouldn't do anything that acted like starting so he brought it over to see if I could get it to run. After checking everything out and replacing the battery I got to the carb. It was in rough shape and I had to even replace the choke shaft because it had set up and wouldn't come out in 1 piece. As is my practice on most old Marvel carbs, I soaked it, poked a tip cleaner through all jets, made a gasket, and put it back together. It will start and run 3 or 4 seconds and then die. If you try to restart immediately it won't but allow it to sit 5 minutes and it fires right up. You can repeat this process all day. It has a good flow of gas to and through the carb. Help?? gm (Thanks in advance)

Bruce(OR) · Jun 16, 2017

plugged gas cap vent. You also have a filter in the brass elbow at the carb that I suspect is plugged. sticking float not allowing proper gas flow is another contender. Pulling out that bottom carb plug should look like a cow pithin on a flatrock.... i

Steve@Advance · Jun 16, 2017

Have you checked the spark immediately after it dies? Take a look at the point gap and check for distributor shaft bushing wear. Might try a volt meter or test light on the switch side of the ignition coil, could be loosing voltage, vibration related, bad ignition switch.

Only running 3-4 seconds isn't enough time to empty a full carb bowl.

Bruce(OR) · Jun 17, 2017

Pull the lower plug. Install barbed fitting. Attach clear hose open on end. Hold hose up towards gas tank. Turn on gas. Gas level inside hose will match the fuel level inside the carb. Too low?

Gary Mitchell · Jun 17, 2017

I retraced the original steps I had taken and added an inline filter. Seemed to do the trick. Thanks for all the ideas. gm

Patch700 · Jun 17, 2017

Should your inline filter get plugged again (most likely) ,
it would be probably caused by a fouled gas tank..

One quick fix is to remove petcock and check to see if it is threaded internally for pipe thread , if so simply add a short pipe nipple so the sediment in the bottom of the tank cannot be picked up .

My TO-35 had a terrible tank and this got me by until a new replacement showed up.

Bruce(OR) · Jun 17, 2017

Some in line filters will stop a gravity flow fuel system.

phil(va) · Jun 17, 2017

I see you put in an inline filter and got past the problem. However, imho, the problem still exists and is probably debris or rust in the tank which is getting in the fuel line. Ideally, you should fix it at the source. Inline filters can bite you on these tractors sometimes.

TO20

Gary Mitchell

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Bruce(OR)

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Steve@Advance

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Bruce(OR)

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Gary Mitchell

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Patch700

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Bruce(OR)

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phil(va)

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