Super H Carb question

jonnny2006 · Jun 20, 2009

Super H will not start unless the throtleis all the way down. Also once started runs perfect at higher speeds. When i go to adjust the high idle jet it DOES NOT make a diffrence if i turn it ALL THE WAY IN or ALL THE WAY OUT. I never seen one run when you turn the high idle jet all the way in. How can it not make a diffrence nomatter where i adjust the main jet? I even took it out and put my finger over the hole and it ran the same no diffrence. It just starts hard and only with the speed all the way down. Got good gas flow,and i can run it all day wide open and it dosent run out of gas.

Janicholson · Jun 20, 2009

Well fixing it might make it use more gasoline. There are plugged up passages in the carb. The high speed adjustment is actually an adjustment of added fuel. It does not control the main jet, it adds to and subtracts from its middle settings. Thus your tractor is running as lean as it would if the adjustable screw was all the way in. If you pulled it hard all day it might burn a valve, or cause other lean condition harm. JimN

jonnny2006 · Jun 20, 2009

i took the carb off and bluw it out. same thing. i might need to soak it. what is best to use?

Red Mist · Jun 20, 2009

(quoted from post at 17:04:15 06/20/09) i took the carb off and bluw it out. same thing. i might need to soak it. what is best to use?

Carburetor cleaner. You can buy it by the gallon can or by the 5-gal. bucket. Either way - disassemble the carb and let it soak for 2-3 days. Then, rinse off parts with a water hose and blow out passages with about 150 lbs of air pressure using a good rubber tipped air nozzle. Be careful you don't shoot carb cleaner in your eye while using the air hose. Then reassemble, mount and adjust. Good luck.
mike

Andy Motteberg · Jun 20, 2009

My H started doing that a while back, only would start with the throttle down. Still is not fixed. I need to replace the cam gear, its loose on the cam.

Anonymous-0 · Jun 20, 2009

The original high speed, load main jet, is calibrated for full load operation and the intention of the adjustment screw is to slightly decerease fuel flow for light loads. You should be able to kill engine off screwing it way in when running at full throttle. Some screws are actually too short to fully contact main jet seat. This can easily be observed if you have carb bowl off. Screwing all the way out will only increase fuel to the calilbrated size of the main jet, however, over the years of these tractors any modifications could have been made. I have seen them drilled out to about 1/16th inch and gas will go through like a house a fire.
Another thing is that some of the increased power packages had a main jet in pkg with a different degree taper on the seat and the original adj screw did not fit it properly. You need to change the screw and seat together. Fire crater packages were that way.

John M · Jun 21, 2009

Run your E85 through it, thatll clean it out!(Im being serious BTW)

Super H Carb question

jonnny2006

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Janicholson

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jonnny2006

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Red Mist

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Andy Motteberg

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Anonymous-0

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John M

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