This manual covers the Cuyuna 2SI ultralight aircraft engine, produced from 1980 to early 1995, encompassing models 230 through 808L. Designed for light aviation applications, the Cuyuna 2SI is recognized for its robust engineering and reliable performance in demanding environments. Its straightforward design and durable construction contribute to its reputation for dependable operation.

This comprehensive service and repair manual provides essential information for the maintenance, troubleshooting, and repair of your Cuyuna 2SI engine. It details technical specifications, operational procedures, and diagnostic guidance. By following the instructions within this manual, owners and technicians can ensure the continued optimal performance and longevity of their aircraft engine.