2si
Defunct American engine manufacturer
title: "2si" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["aircraft-engine-manufacturers-of-the-united-states"] description: "Defunct American engine manufacturer" topic_path: "geography/united-states" source: "https://en.wikipedia.org/wiki/2si" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Defunct American engine manufacturer ::
::data[format=table title="Infobox company"]
| Field | Value |
|---|---|
| name | 2si |
| logo | 2si Logo.jpg |
| type | Private company |
| fate | Out of business 2014 |
| location_city | Beaufort, South Carolina |
| location_country | United States |
| industry | Manufacturing |
| products | Two-stroke engines |
| parent | AMW Cuyuna Engine Company |
| homepage | www.2si.com |
| :: |
| name = 2si | logo = 2si Logo.jpg | type = Private company | genre = | fate = Out of business 2014 | foundation = | founder = | location_city = Beaufort, South Carolina | location_country = United States | location = | locations = | area_served = | key_people = | industry = Manufacturing | products = Two-stroke engines | services = | market cap = | revenue = | operating_income = | net_income = | assets = | equity = | owner = | num_employees = | parent = AMW Cuyuna Engine Company | divisions = | subsid = | homepage = www.2si.com | footnotes = | intl =
2si was an American engine manufacturer located in Beaufort, South Carolina. The company was a wholly owned subsidiary of the AMW Cuyuna Engine Company, formerly known as the Cuyuna Development Company.
The company acquired a line of two-stroke engines that were originally designed and produced by JLO of Germany and marketed them under the Cuyuna brand name for snowmobile and later ultralight aircraft use. Later Cuyuna formed a subsidiary Two Stroke International, commonly known as 2si, to produce and market the engine line. Cuyuna ended selling engines for aircraft use, but instead switched to marketing them only for industrial, marine, auto racing, kart and all-terrain vehicle applications.
The company seems to have gone out of business in 2014.
Engines
- 215 - aircraft, multifuel, industrial engine
- 230 - aircraft, multifuel, industrial engine
- 340 - aircraft engine
- 430 - aircraft and snowmobile engine
- 460 - aircraft, multifuel, marine, industrial and sport vehicle engine
- 500 - sport vehicle engine
- 540 - aircraft and sport vehicle engine
- 690 - aircraft, marine, industrial engine
- 808 - aircraft engine
References
References
- Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page G-2 Cybair Limited Publishing, 2001. {{ISBN. 0-9680628-1-4
- Two Stroke International. (n.d.). "2si Company Profile".
- Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook'', page 69. BAI Communications. {{ISBN. 0-9636409-4-1
- Cuyuna Development Company: ''Cuyuna Engines'', Cuyuna Development Company, undated
- Two Stroke International. (n.d.). "Applications".
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