What is the value of a McCullough 91b1 Go-Kart engine?

Answer 1

Many factors play into this equation. How complete is it? Does it have any compression ? How about spark? A running example could easily fetch three hundred dollars or more, in my estimation. Additional considerations include modification to the intake and exhaust ports, size of the cylinder bore, condition of the cylinder bore, modifications to the cylinder walls (eg window ports), bent or broken fins on the head and around the exhaust port, damage to the cooling fins, damage to the crank etc., etc. From my experience a core motor (a good basis for a rebuild) will run you anywhere from $100 to $300 depending on condition. Then figure another $200-$400 to replace seals and gaskets, bearings, piston and rings, over-bore/hone the cylinder, replace the needle bearings in the crank and rebuild the carb.

A NOS (New Old Stock) motor will run anywhere from $600-$900