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Farmall & IHC Tractors Discussion Forum
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md

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mi mark

05-13-2006 18:35:31




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having trouble with a md has always started hard on gas and smokes a lot then when switching over to diesel wants to miss. checked fuel filters, timing, point gap,plug gap, now I know it's been a while since it was sleeved which could be some of the miss on change over to diesel.




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Janicholson

05-14-2006 08:42:27




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 Re: md in reply to mi mark, 05-13-2006 18:35:31  
I would add to what Brad says below that the linkage can be hanging up or out of adjustment on the third valves in the cylinders. If the linkage does not open the valvs all the way, the mix has to be rich to fire, If not closing well, the diesel will run poorly till they do close, if at all. The adjustment is critical, not hard, but complex and fussy. The engine should be run on gas cycle for two minutes when cold, and 30 seconds when warmed up. If not it will run very poorly on Diesel for a long time. Just my experience, JimN

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Brad in WI

05-13-2006 23:00:35




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 Re: md in reply to mi mark, 05-13-2006 18:35:31  
With the excessive smoke when switching over to diesel, that could be caused by faulty injectors or injection pump. On the gas side do you have to choke it to start, did you try to clean the carb, if it is possible to do a compression test see what it comes out to be on the gas side and that will be a good indication if a rebuild is in your near future. It should have around 100-125 PSI all even across the board if the engine is in good shape. Anything less than 90 PSI I would say time to get down and dirty and order some new parts. My .02 cents on the matter.
Brad

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