Another issue for the DC Think Tank

agonair · Oct 28, 2013

Been running the DC fairly steady at our local pumpkin patch this fall.
While it was idling, it started sputtering and coughing. Now, I cannot get it to run smooth...wants to sputter, cough, backfire.

I dumped some Seafoam in the gas and that has not helped.
Thoughts?

Another issue...When I first start it, I have noticed the Carb throat will have frost on it from the carb up at about a 1/3rd on the throat.

Any thoughts here?

Thank you!

Tubacase47 · Oct 28, 2013

It sounds like a manifold gasket is not sealing properly.

Nedd · Oct 28, 2013

Does it have a distributor? I am thinking points and condenser.

agonair · Oct 28, 2013

About 90 days ago, we put in new points, condensor, plugs, and distributor cap.

I"ll pop off the cap and have a look.

Nedd · Oct 28, 2013

Are you running 12 volts? Do you have an inline resistor before the coil? Some points can't handle more than the rated voltage and if your alternator/generator is putting out say 14-16 volts it causes them to overheat and burnout quickly.

Don't worry about the frost on the intake. See that all the time with no issues. Depends on humidity and temperature and all that.

If points and all look good. Then go to the manifold leak or head gasket leak. While running, Spray carb cleaner around intake gaskets and seen if that changes engine running speed. Then you know you have a leak.

Ron Sa · Oct 28, 2013

If something happened to a valve, an easy first check is to crank the engine with the ignition switch off and observe any unevenness in the compression strokes or hissing at the intake or exhaust. Your symptoms are typical of an intake valve that has a piece of carbon stuck in the seat.

Anonymous-0 · Oct 28, 2013

easy things 1st check to see if you are getting a steady stream of gas to carb. If it is running super lean it will backfire, sputter cough.

Dale in Nw wa · Oct 28, 2013

On my DC there is a adjustment screw on the bottom of carb. after a mounth in the hay fields I need to turn it in about a turn to get it to run correctly. The way I do it is to turn the screw then open throttle all the way when it opens up and dosen't hesitate I leave it there Hope this helps there may be a better way but this works for me Dale

todd hamilton · Oct 29, 2013

Like the post below states check the sediment bowl and fuel intake. Check the carb for dirt if that is not it. Check the float in the carb for sticking, if it is varnished clean it.

C. Amick · Oct 29, 2013

The last time I had problems with a tractor backfiring while idling, the new condenser I had installed went bad. Distributor didn't get rotated, so that the timing is wrong? I would then check the valves.

Another issue for the DC Think Tank

agonair

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Tubacase47

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Nedd

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agonair

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Nedd

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Ron Sa

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Anonymous-0

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Dale in Nw wa

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todd hamilton

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C. Amick

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