240 hard starting

IH fan · Sep 17, 2009

My 240U has gotten harder to start as the summer has progressed. Seems the only way it will start is to have the throttle as low as it will go and do not choke it. Then IF it starts, I need to leave it idle for a couple minutes, IF it will stay running that long, and then very gradually advance the throttle. Once it's been reved up some, it's okay. Gas is fresh, sediment bowl is clean, and since it runs fine after warmed up a little and once the RPM has once been advanced above about 1/3 throttle the first time, I can't see what it could be. Just seems to have something to do with the cold start. This tractor is converted to a 12V. alternator and battery. Could that could be the culprit in some way, but again, why would it run okay after a few minutes? Before this summer, it needed to start without being choked in the summer and choked a little in the winter, but would take off and run okay right away. Do I need hotter plugs, is it a fuel problem or what?

Anonymous-0 · Sep 17, 2009

Did you check your points, are they burned? With a 12 volt conversion you need to put a resistor in so you only get 6 volts to the points. You just ask for a 6 volt resistor at your local parts store and wire it in to the the side of your distribiter where it feeds the points.

Janicholson · Sep 17, 2009

Reading the plugs after it is warmed up can tell the story. Light brown=nice, black=too rich at start. It sounds rich to me. I would put in a new set if the ones in it are fowled. Do you shut off the fuel when stopped. If not do it. Then turn it on just after starting. Can save flooding.
JimN

IH fan · Sep 18, 2009

There is a resistor in the circuit, but I have not checked the voltage to see if it's the proper size. The guy that converted it has been a mechanic all his life, so figured he would know how it's done. Also with the loader on it's hard to see much, but will pop the cap and look at the points. Does not really act like it's flooding because it does not smoke when it starts... think it would have black smoke if it were flooded... maybe not at the slow idle. Was gone all day, so didn't get to look at it today.
Thanks for the replies... will check those things.

IH fan · Sep 19, 2009

First thing I checked was the points. They were burned slightly, but I've seen a lot worse... didn't do anything to them. Had a little moisture in the cap and the top of the rotor was burned like it wasn't making a good connection with the center of the cap. Cleaned that, sprung it up a little and dried the cap. Tractor fired right off, but not sure if I really did anything or it was coincidence because I had the tractor running yesterday. Maybe if it sat a few days it would be hard starting again. I was also able to throttle it right up, which I couldn't do before.

240 hard starting

IH fan

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Anonymous-0

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Janicholson

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IH fan

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IH fan

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