This comprehensive Cuyuna 2SI Ultralight Aircraft Engine Workshop Service Repair Manual covers all models from 1980 to 1995, including the 230-808L series.

This manual provides step-by-step instructions and detailed illustrations for every service and repair procedure you'll need to maintain your engine. It covers all aspects of servicing and repairs, enabling you to perform a wide range of tasks, from routine maintenance to complex troubleshooting and repair procedures.

The manual is organized logically and includes clear instructions, making it easy to find the information you need. Whether you're a seasoned mechanic or a first-time DIYer, this manual will equip you with the knowledge and guidance to keep your Cuyuna 2SI engine running smoothly and safely.

The Cuyuna 2SI Ultralight Aircraft Engine, specifically the 230-808L model, was a popular powerplant for ultralight aircraft during the 1980s and 1990s. Designed and manufactured by Cuyuna Aircraft Engines, the 230-808L was a two-stroke, air-cooled, single-cylinder engine known for its simplicity, reliability, and relatively low cost. It featured a displacement of 230 cubic centimeters and delivered a maximum power output of 25 horsepower. The 2SI series, including the 230-808L, employed a unique design utilizing a reed valve intake and a rotary valve exhaust system. This configuration facilitated efficient scavenging and combustion, contributing to the engine's reliable performance.

The Cuyuna 2SI engine was favored by ultralight aircraft enthusiasts due to its user-friendliness. Its lightweight design, typically weighing around 40 pounds, enabled it to be readily installed in a variety of ultralight aircraft frameworks. The 2SI series was also known for its durability and ease of maintenance. The availability of comprehensive workshop service manuals, such as the one mentioned, further facilitated repairs and upkeep. The popularity of the Cuyuna 2SI 230-808L engine was further bolstered by its relatively low operating costs, resulting from the simple design and minimal parts count. Although production of the Cuyuna 2SI engine line ceased in the late 1990s, the legacy of the 230-808L model persists through its continued use in restored ultralight aircraft and its association with the early days of ultralight aviation.