FG-21(1.26) 4-Stroke Gas Engine: (SAIEG21)

The FG-21 21cc Four-Stroke Gas Engine is a compact, high-performance powerplant designed for gas-powered RC models, delivering the classic four-stroke tone in a lightweight package. It packs 21cc of displacement into a 17cc case, offering an impressive power-to-weight balance for scale aircraft and other demanding builds. Based on the proven FG-20 platform, it blends modern carburetion with updated exhaust valve seats for smooth, reliable operation.

Gasoline operation can lower running costs by up to 90% and provides cleaner operation compared with glow engines. The FG-21 features the latest carburetion technology, a new valve-seat design, and a smaller magnetic ignition that fits into tighter cowl openings. For maintenance, use Red Line or Power Model synthetic oil at a 16:1–20:1 mix. This engine delivers robust power, easy tuning, and the distinctive four-stroke sound enthusiasts expect.