What engine might this be?

Mike Fitz · Dec 10, 2017

I helping a neighbor get her M running, It needs a little tuning to run, a whole lot of work to run well. It is an old pulling tractor with parts from many places, I'd like to know where the engine came from, the oil filler is different from any tractor I've seen and the live pump, and 450 manifold are not from an M, the block is stamped with FBKM 200872 below that is X1. Any insight will be apprecieated.
Mike

Tom Dowling · Dec 10, 2017

I think X1 is for kentucky plant maybe m or sm Dslater or others will know for sure

DR. EVIL · Dec 10, 2017

Louisville never made the bigger IH engines, H, M, W-9. and Supers. X1 was Gasoline fuel standard altitude operation.

leroy in ne · Dec 10, 2017

I may not be correct but without doing research I believe this is a 1948 or 1949 Farmall M engine and should have 248 cast in left side of engine signifying 248 cubic inch engine. I believe X1 was the designation for gasoline head. As far as the oil fill judging by the brazing I can see, someone has modified the original oil fill by adding a ventilated breather/ fill from another application from a car, truck or tractor engine made prior to the 60's as that's when the EPA reguired positive crankcase ventilation where the blow by fumes were returned to the intake system to be burned by the engine.

fastfarmall · Dec 10, 2017

I am sure the air cleaner intake system is hooked up,which would get the top half recycled !

D Slater · Dec 10, 2017

Block casting number 6722DJ and the serial number prefix identifies it as a M engine block. Unless the front engine cover was modified it was changed to mount the hydraulic pump. If I remember correct the first M engine front cover that used the same bolt pattern as pump was a 228xxx engine serial number or higher. Engine came in a 49 model and the tractor serial was probably 209872. Does that work?

D Slater · Dec 10, 2017

Noticed tube or something sticking up below the distributor. If someone rigged up a dipstick tube and drilled block it looks to be open on end. Hydraulic pump line manifold is from a 450 after a serial break or a 400 that was changed from all hard lines from pump to hydraulic valves. Vent line at back of head points to the engine probably having the M head or a SM head. X1 means it came with a gasoline head.

Mike Fitz · Dec 11, 2017

Thanks for the replies! I really don't know what to think, it has a factory dipstick, that I didn't think M's had, the oil filler appears to be aftermarket upon closer inspection, there is silicone squeezed out of almost all gasket surfaces, I'd guess it's hodgepodge of parts put together to make it run. Anyway, it runs now and is going back home.
Mike

What engine might this be?

Mike Fitz

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Tom Dowling

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DR. EVIL

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leroy in ne

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fastfarmall

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D Slater

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D Slater

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Mike Fitz

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