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Hi, I have a Keihin carb on a CCW KEC400 engingine in a 1973 Argo snowmobile, yes an Argo snowmobile. It has ON44A stamped on the mounting flange.
My problem is trying to figure out the connections on it, it has 3 connections on the bottom and 2 on the top. I it looks like one on the bottom is for a pulse line from the crank case but I don’t about the other 2 bottom connections. It has what looks like a built in fuel pump and seems to be more complicated than necessary for a snowmobile. I am hoping someone on the forum has run across one and may even have a drawing. One connection on the top I believe is the primer inlet as it is jetted and the other looks like a return to the tank similar to a Tillotson HD carb.
Any information would be appreciated.
Thanks
 
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