Hi all I replaced the fuel pump on my 1989 414-8, Kohler M14, spec.# 601540, Ser.# 199xx110353, with a new plastic pump. The tractor was starting hard and after sitting 2 or more weeks it would not start without putting gas in carb. Well when I took the old pump off it was a plastic pump, I was thinking it would be a metal one. Ok when did they start putting plastic pumps on Kohler engines? By the way the new pump made a great improvement in starting. The old pump was pumping but maybe not enough. I was just suprised that there was a plastic pump on a 1989 Kohler engine, maybe replaced before I got it?I thought this might help someone with a hard starting engine, just one more thing to check. Bob ( oldlineman )