I have acquired a 3.9 hp with Mercury on the cowling, and also on it is Kiekhaefer Corp. Made in Fonde du lac, WI. I was told all it needed was a shear pin - but that doesn't seem to be the problem. When you remove the cowling, the pull rope is attached in such a way that you cannot pull the rope with the cowling off. It also uses a separate gas tank. I have no idea how old the motor is, but would sure like to get it running. The serial number may be a clue as to the age, etc. - #2147592. Any ideas, or know where I might get some written info about the motor?