McCulloch MAC-101

The McCulloch MAC-101, also called the MC-101 and MC101, is a two-stroke, single cylinder engine that was designed and produced by McCulloch Motors Corporation for kart racing use, being introduced in 1967. It was also used in the late 1970s and early 1980s as an ultralight aircraft engine.^[1][2][3][4]

McCulloch MAC-101
Type	Kart racing engine
National origin	United States
Manufacturer	McCulloch Motors Corporation
Major applications	Kart racing Ultralight aircraft

Design and development

All models in the MC-101 series have a bore of 2.280 in (5.791 cm), a stroke of 1.835 in (4.661 cm) and a displacement of 7.5 cu in (122.90 cc).^[1]

Variants

MC-101

Introduced in 1967^[1]

MC-101A

Introduced in 1969^[1]

MC-101AA

Introduced in 1971^[1]

MC-101B

Introduced in 1974^[1]

MC-101C

Introduced in 1969^[1]

MC-101D

Introduced in 1971^[1]

MC-101M/C

Introduced in 1973^[1]

Applications

Aircraft

• AmEagle American Eaglet
• Aviastroitel AC-4 Russia
• Birdman TL-1
• Eipper Quicksilver
• Farner HF Colibri 1 SL
• Hovey Whing Ding II
• Lockheed Aequare
• Skyhigh Skybaby
• UFM Easy Riser
• Volmer VJ-23 Swingwing

Specifications (MC-101B)

Data from McCulloch Kart Engines, Bore and Stroke, MC101B Kart Engine Illustrated Parts List and Cliche^[2][3][4]

General characteristics

• Type: single cylinder, two-stroke engine
• Bore: 2.280 in (5.791 cm)
• Stroke: 1.835 in (4.661 cm)
• Displacement: 7.5 cu in (122.90 cc)

Components

• Fuel system: carburetor
• Oil system: pre-mixed
• Cooling system: air-cooled

Performance

• Power output: 12.5 hp (9 kW) at 9000 rpm