I have a Kohler M12 engine here that I bought a brand new OEM Kohler fuel pump for. I hate it, as the original was metal, this is a plastic POS. but the metal ones are long since NLA. This pump is the "universal" kind, universal as in the inlet/outlet fittings are designed to snap into teeth on the respective sides of the pump body, where you align the teeth where you would want to, to turn the fittings in what ever direction they need to go in order to accommodate connecting them to the pump.
I had bought 2 of these pumps at the same time since I have 2 identical engines here, same spec number and everything and I'd already robbed the original pump from this engine to put onto my other one since this engine is basically a spare for that machine. Since buying these pumps, the threads on rebuild kits for the original style pumps came about on the forum here but as things figure, I'd already disposed of the original ones. Can't keep everything....
here is the issue; Not a big deal I guess, but it is aggravating. On the original pump, the inlet was on the side closest to the aluminum block closure plate, and the outlet was on the side away from that, meaning that the outlet line from the pump to the carb was bout a 4" "straight shot" out of the pump and into the carb, both on the side as each other. I had other reasons to do so, but I just looked up something about these engines on Bing Images and every pic that I see shows the orientation of inlet and outlet the same way. The new pump though? According to the "inlet" and "outlet" arrows on the pump body, fuel flows the opposite way thru the fuel pump body. meaning that the outlet hose coming from the pump to the carb inlet has to cross under the carb instead of just running up the side of the pump body and carb bowl.
This makes no sense to me, though many old part numbers supersede to this pump. I am all for simplification and having to deal with less different versions of any given part among an engine series but What were they thinking here? I don't remember a cast iron Kohler having to have the outlet from the pump/inlet to the carb, having to cross under the carb to be able to connect the 2 components.
I don't have the box no more from this new pump, but looking in a catalog I have here I can see that this pump that I bought is PN 47 559 11-s I remember comparing the 2 new pumps to each other when I 1st got them and both were marked the same. I'll try to locate the other new pump, I have not installed it on anything yet, it is still in the box that way I can verify that PN for sure.
Yes, I have the pump installed "right side up"....
Are the arrows in the pump body mis-stamped?