Super H won't start

brnshot · Nov 13, 2009

I have a '53 Super H that i just rebuilt the carb on. I put it back on and the tractor will not start. It doesnt seem to be getting enough gas to get it going even with adjustments. Does anyone have any ideas of what it could be. I would be thankful for your help.

504-2 · Nov 13, 2009

Take the plug out of the bottom of the carb to see if you have gas and good flow. If you do gas is not the problem and if none take the fuel line off at the carb, if none, turn the gas on,if on, fill the tank. I am being a smart but I know, you got the laugh a little or cry all of the time. Check the gas first,gas shut off, carb, Coil wire. It has to be simple.

rustyfarmall · Nov 14, 2009

The super H carb uses that double float, just like an M, and it is very easy for the float to get "tweaked" so that it actually rubs the sides of the fuel bowl. If the float cannot move freely inside the fuel bowl, it cannot drop down to allow fuel to get in, and it cannot rise up to shut the fuel off. When you rebuild one of these carbs, you always should hold it up to your ear, turn the carb upside down and then turn it right side up, and listen for the float moving inside. Yes, you CAN hear it.
It is also quite possible that NEW float valve is a bit sticky and just isn't dropping down enough to allow a sufficient flow of fuel. Clean both the needle and the seat with aerosol carb cleaner BEFORE installing. I've also been experimenting lately with spraying a small amount of silicon lubricant on the viton tipped needle before installing. It does seem to help.

El Toro · Nov 14, 2009

Disconnect the gas line at the carburetor and see if there's a full stream of gas from the gas line. If that looks ok remove the tube fitting where your gas line connects and look for a screen behind the tube fitting that may be plugged with rust or dirt. If that's not the problem hold your hand over the throat of the carb and see if there's good suction while someone else makes an attempt to start the engine. Hal

Dave 2N · Nov 14, 2009

Good advice from all and it probably is a fuel issue but just for the heck of it, check to see if the voltage regulator and generator wires are all tight. Sometimes these things get tweaked in the process of doing something else to a tractor.

Anonymous-0 · Nov 14, 2009

If the engine cranks ok, the generator and voltage regulator have absolutely nothing to do with the ignition circuit. The exceptions would be a no crank condition caused by the battery not being charged(a condition he doesn't have) and a high voltage condition which would cause premature pointburning over time.

Nick in Kansas · Nov 14, 2009

My Father in law has a 300 that he had the carb rebuilt twice, and it still wouldn't run. He was sure it was a fuel isue. I got to messing with it, and just for the fun of it, put a different set of plugs in. It fired right off, and to my knowledge has never had any trouble since. Just guessing on his, the plugs were saturated with gas, and wouldn't fire.

Super H won't start

brnshot

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504-2

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rustyfarmall

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El Toro

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Dave 2N

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Anonymous-0

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Nick in Kansas

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