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Starting a Model B

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Joe Westrich

02-05-2003 05:20:31

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I have an AC Model B. It starts exactly as directed in manual. "Pull choke for one turn of engine and push back in". If done perfectly the tractor starts and runs beautifully.

If I do not do this perfectly or if the engine fails to initially keep running it will not restart regardless of choke position. It appears that it floods immediately. My only recourse is to leave it sit for a day and try again the next day.

Does anyone have any suggestions of how I can releive this "sensitivity" or a simple way to start it when this happens. This happens to me about 40% of the time and needless to say is very annoying and non-productive. Will welcome any suggestions.

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02-06-2003 10:18:11

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 Re: Starting a Model B in reply to Joe Westrich, 02-05-2003 05:20:31  
OK you guys, this old man has the answer. The AC combine had the same B engine on it. Just above the carburator in the intake manafold was a petcock. Maybe about a 1/4 inch air opening. DIRECTIONS IN THE BOOK says that if not started and flooded to open the petcock and let it suck air. This happened many, many time to me. No way would it start untill I opened the petcock. This was 100 percent fault and cure. Look for plug in the intake manifold and try that. I agree, when flooded--no way will they start. Some XXXXX shot my B in the engine side.
Good luck. Kenny in Colorado
Good luck

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02-06-2003 03:18:49

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 Re: Starting a Model B in reply to Joe Westrich, 02-05-2003 05:20:31  
Unreasonable, I would get another tractor!

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Joe Westrich

02-06-2003 04:06:56

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 Re: Re: Starting a Model B in reply to Jimbob, 02-06-2003 03:18:49  
OK--Want to buy this one?

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02-05-2003 09:02:35

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 Re: Starting a Model B in reply to Joe Westrich, 02-05-2003 05:20:31  
Hey Joe, our 38B does about the same thing. Pull once with choke on, once with it off and it starts on the 2nd pull about 80% of the time, if not you can pull til your ready to hit it with the crank and it only pops occasionaly. Only remidy for ours is to let it sit about 10 minutes or pull it about 2 feet and it runs. Like you, I have tried choking again and not to no avail. Ours has a fresh engine and it is kept in a good state of tune at all times, had an extra magneto laying around and tried that too, no change. New plugs seem to increase the probability of starting quite a bit. If you figure yours out would you mind dropping me an E-mail? Ive been fooling with ours for 3 years trying to figure it out.

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Phil Auten (TX)

02-05-2003 07:08:06

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 Re: Starting a Model B in reply to Joe Westrich, 02-05-2003 05:20:31  
I think Steve has you covered, Joe. I would check the float level and the needle and seat of the carb for problems. If you replace the needle and/or seat with an all brass needle, take a plastic or leather mallet and give the needle a couple of light taps while it is seated on the seat. This makes the needle and seat conform to each other and gives a good seal. This is not required vor a Viton tipped needle (black, rubber like tip on the needle).


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Steve in N.J.

02-05-2003 06:12:00

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 Re: Starting a Model B in reply to Joe Westrich, 02-05-2003 05:20:31  
Might wanna try starting her up without opening the fuel petcock first, if you smell gas and think she's flooding. Then as she's running, open the petcock up. Maybe the floats are a tick on the high side, and she's flooding on ya intermitently. That's the way I start my B. I don't even use the choke half the time. Also, before I shut mine down, I'll close the fuel petcock first and let it run for a minute, then hit the kill switch and shut her down. I use some of the gas up in the fuel bowls. Once in a while, my B would drip a little fuel when it sat, and that seems to eliminate that problem. Just a thought... Steve B.

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