do I have a mac 5 motor?

[ted johnson]

Could be an Mc5 with the Mc6 conversion factory kit. It had a stroker crank and a thin ring piston. It had instructions for rotating the head 180 degrees, a template for cutting the shrouds for the plug cover boot that was also in the kit. You then had a 1.5" stroke, thin ring piston, thin head basket, and an engine that would no longer be beaten by Power Products AH58's and Homelites. T^ake off the head and measure the stroke. The Mc5 had a 1.375" stroke, and the piston left the intake ports almost half covered at bottom dead center. I have an Mc5 here in the house with the stock crank still in it.. Ted