McCulloch Mc 101 AA  ... 1972 Bore 2.280 ... Stroke 1.835 ... Displacement 7.5

Block part number ........................................................no Fixed head ...................................................................no Copper o-ring head gasket ...........................................yes Flat alloy head gasket .................................................no Large PTO bearing (pn 6204) ......................................no Oilier mount nub .........................................................yes Bolt-in transfer port cover ...........................................no 3rd port intake ............................................................no 2 Finger ports intake port ...........................................yes Factory 9  port  transfer ports .....................................no Machined recess for rod bolt clearance .....................no Cast-in recess for rod bolt clearance ..........................yes Ribs in exhaust port ...................................................no Recess for square exhaust gasket ..............................no Crank PTO thread L/R hand ....................................... both available Chrome or painted shrouds......................................... chrome

Mc 101AA Model  400170  16- IPL 86496 Owners Manual 85205 Production Period 2/72 to 10/74