2si 230
title: "2si 230" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["air-cooled-aircraft-piston-engines", "two-stroke-aircraft-piston-engines"] topic_path: "general/air-cooled-aircraft-piston-engines" source: "https://en.wikipedia.org/wiki/2si_230" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::data[format=table title="infobox aero engine"]
| Field | Value |
|---|---|
| name | 2si 230 |
| engine_type | Two-stroke aircraft engine |
| manufacturer | 2si |
| national_origin | United States |
| :: |
| name=2si 230 | image= | caption= |engine_type= Two-stroke aircraft engine |manufacturer=2si |national_origin=United States |first_run= |major applications= |produced= |number_built= |program cost= |developed_from= |variants_with_their_own_articles=
The 2si 230 is a family of single-cylinder, two-stroke, single ignition, aircraft engines that were designed for ultralight aircraft.
The basic engine was originally designed and produced by JLO-Motorenwerke of Germany and was later acquired by the AMW Cuyuna Engine Company of Beaufort, South Carolina and marketed under the Cuyuna brand name. Later the engine was marketed by Cuyuna under the Two Stroke International (2si) brand. Cuyuna no longer markets engines for aircraft use although the 230 is still in production as a diesel/multifuel or gasoline industrial and marine engine.
Development
The 230 is a conventional single-cylinder engine that weighs only 36 lb in its A20 version. The engine features single capacitor discharge ignition, piston porting, tuned exhaust system, slide venturi-type carburetor, fuel pump, a cast iron cylinder liner, ball, needle and roller bearings throughout. The engine was offered with cog belt drive or a gearbox reduction system. Starting is electric starter or recoil starter.
Variants
;230-A20 :Gasoline aircraft engine, 20 hp at 6000 rpm, weight 36 lb, out of production. ;230F-20 :Gasoline industrial engine, 20 hp at 6000 rpm, weight 47 lb without gearbox, still in production. ;230-F22 :Gasoline aircraft engine, 22 hp at 6500 rpm, weight 48 lb, out of production. ;230 MF :Diesel/multifuel industrial and marine engine, 15 hp at 5700 rpm, still in production.
Specifications (230-A20)
and start a new, fully formatted line with -- |ref=Cliche |type=Single-cylinder, two-stroke aircraft engine |bore=69.5 mm |stroke=60.0 mm |displacement=228 cc (13.91 cu in) |length=11.7 in |diameter= |width=14.6 in |height=14.0 in |weight=36 lb |valvetrain=piston porting |supercharger= |turbocharger= |fuelsystem= |fueltype=Minimum 92 octane |oilsystem=premixed oil and fuel |coolingsystem=air-cooled |power=20 hp at 6000 rpm |specpower= |compression= |fuelcon= |specfuelcon= |oilcon= |power/weight=
|designer= |reduction_gear=cog belt or optional gearbox
|general_other= |components_other= |performance_other=
References
References
- Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page G-2 Cybair Limited Publishing, 2001. {{ISBN. 0-9680628-1-4
- (n.d.). "2si Company Profile".
- (n.d.). "Diesel / Multi-fuel Engine - Model 230 MF - Marine and Industrial Applications".
- (n.d.). "Engine Model 230F – 20".
- Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook'', page 69. BAI Communications. {{ISBN. 0-9636409-4-1
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