Need help with a 53 super h

1939farmall · Aug 20, 2017

What am I missing? I mowed 4 or 5 acres yesterday with my 53 super h. shut it down to go eat supper and when I came back out it would not start. It ran perfectly and I haven't had any real problems with it. Last night I checked the following:
I have good spark at the plugs
I pulled the carb and made sure all the port were clear
It would crank fine but not start.

I gave up for the night and let it sit. I went out this morning and it started right up. So I warmed it up a pulled it in and checked the valves ( it was due anyway). I set them to .017 put it back together and took it for a test drive. Ran fine. Pulled it back into the shop and now it won't start again. I have good fuel flow. I have spark. I just set the valves. Sure seems like a " won't start when hot problem". What the heck am I missing?
Thanks in advance for the help.

<image src="http://forums.yesterdaystractors.com/photos/mvphoto2271.jpg"/>

JD Seller · Aug 20, 2017

Due you have spark at the plug or just the coil??? I have seen bad rotor buttons do this. If you have spark at the coil then it is fuel. Flow to the carburetor is important but does not tell you if you have fuel/air mixed in the intake. Take a bottle of starting fluid/gas in a spray bottle etc. and put it into the carburetor. IF it runs then you have carb. issues. A stuck float comes to mind coming with it coming and going.

Ron Muhlenkamp · Aug 20, 2017

When a cool goes bad, it often will work when cold but fail when hot.

Janicholson · Aug 20, 2017

If you have a spare coil, put it on. A weak coil will run when cold, get worse as ti heats up (usually heats up too hot to touch) and may keep running but will have too little spark to start from hot. Jim

1939farmall · Aug 20, 2017

I checked at the plug and I do have spark. Not sure if it's enough when hot. It usually sits just long enough to have the occasional carb issue. When it had to carb off it appeared the needle was moving freely in the seat. I don't have a spare coil on hand but it sounds like it may be time to get one.

FBH44 · Aug 20, 2017

On the other forum, I recommended new distributor cap and rotor. Fixed my h WITH THE same symptoms. Had the center electrode worn away.

used red MN · Aug 20, 2017

Is the electrical system stock 6V or has it been converted to 12V? If the system has been converted who knows what has been done to the circuits. No offense if you did it yourself but just trying to help you figure it out. I'm going with a suggestion usually made by the poster "old". That is to put a temporary hot wire from the battery to the coil. So to avoid positive ground or negative ground confusion, you will be running it to the battery terminal that is feeding the starter switch. Now see if your hot start issue goes away. If so something in the wiring needs addressed.

1939farmall · Aug 20, 2017

It is still the 6v system. Thank you for the help.

Need help with a 53 super h

1939farmall

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JD Seller

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Ron Muhlenkamp

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Janicholson

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1939farmall

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FBH44

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used red MN

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1939farmall

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