Features / Model & 1st year built MC10 MC20 MC30 MC40 MC-45 MC70 MC75 MC100 1966 MC101 1967 MC101A 1969 MC101AA 1972 MC101B 1974 MC101C 1969 MC101D 1971 MC101M/C 1973 Bore 2.125 2.125 2.165 2.165 2.165 2.217 2.250 2.250 2.280 2.280 2.280 2.280 2.280 2.280 2.280 Stroke 1.500 1.635 1.635 1.635 1.635 1.835 1.835 1.835 1.835 1.835 1.835 1.835 1.835 1.835 1.835 Displacement 5.3? 5.8 6.05 6.05 6.05 7.08 7.29 7.29 7.5 7.5 7.5 7.5 7.5 7.5 7.5 |
McCulloch Super / 101 Series Identification Chart For Reference only Updated: 14th March 2008 |
Primary Areas for Positive Block Idendification MC10 MC20 MC30 MC40 MC-45 MC70 MC75 MC100 1966 MC101 1967 MC101A 1969 MC101AA 1972 MC101B 1974 MC101C 1969 MC101D 1971 MC101MC 1973 Block part number see at bottom of page Intake Open Below Cylinder wall - large or small N N N Y Y Y Y Y Y Y Y Y Y Y Y Fixed head N N N N N Y N N N N N N N N N Copper o-ring head gasket N N N N N N N N N Y Y Y Y Y Y Flat alloy head gasket Y Y Y Y Y N Y Y Y N N N N N N Large PTO bearing (pn 6204) ? ? ? ? Y ? Y Y N N N N N N N Oiler mount nub Y Y Y Y Y Y Y Y Y Y Y Y/N Y Y Y Bolt-in transfer port cover N N N N N N N N Y N N N Y N N 3rd port intake Y Y N N N Y N N N N N N N N N 2 Finger ports intake port N N N N N N N N N Y Y Y N Y Y Factory 9 port transfer ports N N ? Y ? N Y N N N N N N N N Machined recess for rod bolt clearance N N N N N N N N Y Y N N Y N N Cast-in recess for rod bolt clearance N N N N N N N N N N Y Y N Y Y Ribs in exhaust port Y Y Y N N N N N Y N N N Y N N Recess for square exhaust gasket N N N N N N N N N N N Y N N N |
MC10 MC20 MC30 MC40
MC-45 MC70 MC75
MC100 1966 MC101 1967 MC101A 1969
MC101AA 1972 MC101B 1974
MC101C 1969 MC101D 1971 MC101MC 1973 Round Cylinder Head Y Y Y ? ? ? N N N N N N N N N RH Thread PTO crankshaft Y Y Y Y Y Y Y N Y Y Y N N N N LH Thread PTO crankshaft N N N N N N N Y Y Y Y Y Y Y Y Painted block Y Y Y Y N N N N N N N N N N N Yellow fan shroud & head cover Y Y Y Y Y Y N N Black fan shroud - Yellow head cover N N N N N N N ? N N N N N N N Black fan shroud - Chrome head cover N N N N N N N N N N N N N Y N Air horn and wider flywheel cover N N N N N N N N N Y Y Y N N Y Chrome shrouds - flywheel & head N N N N N Y Y ? Y Y Y Y/N N N Blue fan shroud & red head cover N N N N N N N N N N N Y/N N N N White fan shroud/red head cover N N N N N N N N N N N N N N Y Yellow fan shroud & chrome head cover ? ? ? ? ? N N N N N N N N N .. N |
Secondary areas which are not a positive ID of a block as parts may have been repainted
or installed from other models |
Key: Y = Yes Feature exists
N = No Feature did not exist |
Cylinder Part Numbers Mc 10 Mc 20 Mc 30 Mc 40 Mc 45 Mc 70 Mc 75 Mc 100 Mc 101 Mc 101a Mc 101aa Mc 101b Mc 101c Mc 101d Mc 101m/c 48612 48871 48992 47749 47878 47795 47873 47873B 66019 84534 92909 66019 84534 66019 89390 |
Carby part no Mc 10 Mc 20 Mc 30 Mc 40 Mc 45 Mc 70 Mc 75 Mc 100 Mc 101 Mc 101a Mc 101aa Mc 101b Mc 101c Mc 101d Mc 101m/c 50070c / 48907 / 48907 / / 48890b / 48907a / 48907b / 48890b / 68907 / 68886 / / 88845 / / 84446 / / 69812 / / 68886 / 82894 / 84947 / |