McCulloch Mc 101a  ... 1969

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 ................................................. yes
Large PTO bearing (pn 6204) ....................................... yes
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 ....................................... L/H

Chrome or painted shrouds......................................... chrome
No model no no serial no prefix
IPL 63940
Owners Manual 85205
Production Period 4/67 to 1/69