Building a McCulloch's Mc 5 from a D-30/36 Saw Engine  Making a Mac 5 Engine clone

I would like to add that possibly most of the 80cc engines were fitted with the heavier and wider cast iron piston rings for saw use.

D-30 / 36 starter fan housing Modded exhaust on the D-30 style cylinder will give the D-30 a bit of a wake up call done by an early Karter

YEAR INTRODUCED:  May 1958 YEAR DISCONTINUED:  April 1959 ENGINE DISPLACEMENT:  4.9 cu. in. (80cc) NUMBER OF CYLINDERS:  1 CYLINDER BORE:  2.125 in. (54mm) PISTON STROKE:  1.375 in. (35mm) CYLINDER TYPE:  Aluminum with cast iron sleeve INTAKE METHOD:  Reed valve and third port induction system