The McCulloch MAC-101, also called the MC-101 and MC101, is a

two-stroke A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston, one up and one down, in one revolution of the crankshaft in contrast to a four-stroke engine which re ...

, single cylinder engine that was designed and produced by

McCulloch Motors Corporation McCulloch Motors Corporation is an American manufacturer of chainsaws and other outdoor power tools. The company was founded in Milwaukee, Wisconsin, in 1943 by Robert Paxton McCulloch as a manufacturer of small two-stroke gasoline engines and ...

for

kart racing Kart racing or karting is a motorsport discipline using open-wheel, four-wheeled vehicles known as go-karts or shifter karts. They are usually raced on kart circuit, scaled-down circuits, although some professional kart races are also held on fu ...

use, being introduced in 1967. It was also used in the late 1970s and early 1980s as an

ultralight aircraft Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and Aircraft flight control system, conventional three-a ...

engine.Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page E-34. Cybair Limited Publishing, 2001.

Design and development

All models in the MC-101 series have a bore of , a stroke of and a displacement of .

Variants

;MC-101 : Introduced in 1967 ;MC-101A : Introduced in 1969 ;MC-101AA : Introduced in 1971 ;MC-101B : Introduced in 1974 ;MC-101C : Introduced in 1969 ;MC-101D : Introduced in 1971 ;MC-101M/C : Introduced in 1973

Applications

;Aircraft

Specifications (MC-101B)

References

{{Reflist

External links

Photo of two MC-101 enginesPhoto of racing kart with dual MC-101 engines
Air-cooled aircraft piston engines Two-stroke aircraft piston engines