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Order Ford 800 Parts Online

Ford 800 runs rich

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Al Emerick

06-29-2000 20:07:45




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I have a 861 with a Marvel Schebler carb. The engine burns no oil and has good compression. With new plugs it runs well for a few hours. After that it starts to miss and the plugs are black and sooty, not oily. It seems to be running rich. Have rebuilt carb.. Have run with the high speed valve on the lean side but have never seen plugs with a tan color. Is there a problem with the carb. not atomizing the fuel ? It also backfires when the key is turned off.

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mike

06-30-2000 16:39:00




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 Re: Ford 800 runs rich in reply to Al Emerick, 06-29-2000 20:07:45  
I have an Ford 850 and a John Deere 1010 that used to do the same until I went to to a hotter plug. Just ask your parts guy to cross the recomended plug to a hotter plug (without looking at a catalogue H-10 seems to ring a bell).



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Tom Fischer

06-30-2000 06:38:41




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 Re: Ford 800 runs rich in reply to Al Emerick, 06-29-2000 20:07:45  
I have a 641. Always used to have problems like that using Champion H-12 plugs. I finally called Champion and got an engineer on the phone. He explained that H-12 were specified in 1958 for gasoline that was manufactured in 1958. He recommended Champion Y-12 (I think that's what they are - can check it).

Had the same plugs in now for at least 300 hours. Never even clean them. Runs great.

Tom F.

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tlak

06-30-2000 07:51:33




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 Re: Re: Ford 800 runs rich in reply to Tom Fischer, 06-30-2000 06:38:41  
Y-12 is not a good number



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Tom Fischer

07-01-2000 04:26:06




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 Re: Re: Re: Ford 800 runs rich in reply to tlak, 06-30-2000 07:51:33  
The correct number is Champion UJ 12.

Sorry for the confusion.



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