# McCulloch MAC-101

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

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

## 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](/source/AmEagle_American_Eaglet)

- [Aviastroitel AC-4 Russia](/source/Aviastroitel_AC-4_Russia)

- [Birdman TL-1](/source/Birdman_TL-1)

- [Eipper Quicksilver](/source/Eipper_Quicksilver)

- [Farner HF Colibri 1 SL](/source/Farner_HF_Colibri_1_SL)

- [Hovey Whing Ding II](/source/Hovey_Whing_Ding_II)

- [Lockheed Aequare](/source/Lockheed_Aequare)

- [Skyhigh Skybaby](/source/Skyhigh_Skybaby)

- [UFM Easy Riser](/source/UFM_Easy_Riser)

- [Volmer VJ-23 Swingwing](/source/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](/source/Two-stroke) engine

- **[Bore](/source/Bore_(engine)):** 2.280 in (5.791 cm)

- **[Stroke](/source/Stroke_(engine)):** 1.835 in (4.661 cm)

- **[Displacement](/source/Engine_displacement):** 7.5 cu in (122.90 cc)

### Components

- **Fuel system:** [carburetor](/source/Carburetor)

- **Oil system:** pre-mixed

- **Cooling system:** air-cooled

### Performance

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

## References

1. ^ [***a***](#cite_ref-IDchart_1-0) [***b***](#cite_ref-IDchart_1-1) [***c***](#cite_ref-IDchart_1-2) [***d***](#cite_ref-IDchart_1-3) [***e***](#cite_ref-IDchart_1-4) [***f***](#cite_ref-IDchart_1-5) [***g***](#cite_ref-IDchart_1-6) [***h***](#cite_ref-IDchart_1-7) [***i***](#cite_ref-IDchart_1-8) macbobaust.com (14 March 2008). ["McCulloch Super / 101 Series Identification Chart"](http://macbobaust.com/101series.html). Retrieved 13 December 2011.

1. ^ [***a***](#cite_ref-Bores_2-0) [***b***](#cite_ref-Bores_2-1) macbobaust.com (n.d.). ["McCulloch Kart Engines, Bore and Stroke"](http://macbobaust.com/bores.html). Retrieved 13 December 2011.

1. ^ [***a***](#cite_ref-Parts_3-0) [***b***](#cite_ref-Parts_3-1) macbobaust.com (n.d.). ["MC101B Kart Engine Illustrated Parts List"](http://macbobaust.com/kart101b.html). Retrieved 13 December 2011.

1. ^ [***a***](#cite_ref-Cliche_4-0) [***b***](#cite_ref-Cliche_4-1) Cliche, Andre: *Ultralight Aircraft Shopper's Guide* 8th Edition, page E-34. Cybair Limited Publishing, 2001. [ISBN](/source/ISBN_(identifier)) [0-9680628-1-4](https://en.wikipedia.org/wiki/Special:BookSources/0-9680628-1-4)

## External links

- [Photo of two MC-101 engines](http://www.vintagekarts.com/MC101.jpg)

- [Photo of racing kart with dual MC-101 engines](https://i.pinimg.com/originals/c7/80/df/c780df3d359c4999e0adefdb55d10333.jpg)

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Adapted from the Wikipedia article [McCulloch MAC-101](https://en.wikipedia.org/wiki/McCulloch_MAC-101) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/McCulloch_MAC-101?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.