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Are propane manifolds for an M or Super M one or otwo piece?

R

R Weld

Member
Want to put a propane manifold on my M...of some of the ones I've see, some appear to be one piece and some appear to be two. Which is correct? Anybody have a pic they could share?
 
Was a serial number break for SM LP tractors. Early ones used the same manifold as a gasoline. Then they changed to the type separated at the exhaust and intake above where a carburetor would go. Originals IH were tied together at other places and in one piece though.
 
I see what you mean: you mean were the LP manifolds made so that there is a minimum amount of heat transfer between the exhaust and the intake plenum. The answer is yes, for 450 LP's. But even then, the whole thing is one casting. Hugh
 
The one I have is from an M I parted out. It is a two piece but since it is after market I would have to look at it to see if there is any manufactures identification on it.
 
IH type used on part of the SM tractors and on 400 and 450 tractors could be sawed at some mounting holes to be two piece, but they were joined when new. IH never made a M LP tractor to market. This looks like a LP off the engine.
Or the 3 ribs can be removed from the 450 gas one pictured on engine and have close to the same manifold. It can be left 1 piece or made 2 piece.
a169230.jpg

a169231.jpg
 
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