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1935 D spark plug carbon build up

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marty Z

10-19-2002 00:26:49




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The D is running great but I have some starting problems. I pulled the plugs that are autolite 3076 and they were black carboned up. (not wet)...Where should I go from here? On another note I am not sure how to set up the oil bath air cleaner and that might be my problem. I dipped the filter in oil and let drain then filled the bottom bowl like I do my farmall. Is this the problem or should I try to adjust the carb to be leaner. I have already ordered the 3077 autolite plugs that are supposed to be hotter.The mag and Carb are rebuilt by Roberts and the rings and Cyl are rebuilt by me.

Thanks marty Z

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Larry W.

10-20-2002 04:58:45




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 Re: 1935 D spark plug carbon build up in reply to marty Z, 10-19-2002 00:26:49  
Marty, get it good and hot and hit the water injector a little bit. Kind of a rush! It will also clean the plugs real quick. Can't have antifreeze in the system though.



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Lyle Pfeifer

10-19-2002 20:23:33




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 Re: 1935 D spark plug carbon build up in reply to marty Z, 10-19-2002 00:26:49  
Marty, You may even want to go 1 hotter with your plug. You are looking for a tan color after running. If you get to hot the electrode will melt. If you are going to work the tractor, it should run fine as long as you get the tempature up to normal operating range. My "A" likes about 170F. Short runs and lower throttle settings will lead to plug problems, as well as blow by the rings and worn valve guides. Lyle

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marty Z

10-19-2002 07:41:09




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 Re: 1935 D spark plug carbon build up in reply to marty Z, 10-19-2002 00:26:49  
OK , Thanks.
You guys are right about not running the beast long and hot enough.
Marty Z



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John T

10-19-2002 07:23:50




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 Re: 1935 D spark plug carbon build up in reply to marty Z, 10-19-2002 00:26:49  
Marty, thats basically a problem you're not going to get completely rid of, but I have a few suggestions later that can help. First, you have to rememebr that tractor was designed to operate at FULL THROTTLE and at FULL LOAD in which case the plugs and combustion chamber would get hot enough so the plugs wouldn't accumulate that carbon but develop that nice gray color. However, in parades and light use with the fuels now available, plugs carbon up in a short period of time. I use Autolite 3077 which are a little hotter and the side wire electrode type, gap them maybe 0.030 or so, and run my carbs load and idle adjusters both as lean as possible which helps that plug problem somewhat. If you have shutters or curtains, close them down also to run at slightly hotter temperatures. Of course, the points and other ignition parts need to be in tip top shape. Good Luck, Ol John T Nordhoff in Indiana

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gwh

10-19-2002 06:17:35




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 Re: 1935 D spark plug carbon build up in reply to marty Z, 10-19-2002 00:26:49  
Marty, Common problem to all of us, as said here before a lot of has to do with todays gasoline(or what ever lump of chemicals we're sold as gas), which is designed for todays engines. Add that to low compression as designed engines, engines now that are not as tight as new and the fact most all we do is play with these tractors and almost never get them warm enough long enough that adds to the carbon type material that blackens the plugs. I use he hottest plug i can get and when needed run them thru the glass bead cabinet. gwh

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JDG

10-19-2002 20:28:27




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 Re: Re: 1935 D spark plug carbon build up in reply to gwh, 10-19-2002 06:17:35  
I have been adding some lead additive to the gas on my 2cyl, it seems to help some. Just my nickies worth



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