Saito FG-90R3 90cc 3-Cylinder Gasoline Radial Engine (SAIEG90R3)

The Saito FG-90R3 90cc three-cylinder gasoline radial engine is built for large-scale RC aircraft. This updated version of the FG-84R3D increases displacement for more power while keeping the same exterior size, making it a convenient drop-in replacement. It delivers the signature four-stroke sound and smooth reliability that scale modelers expect from Saito, with a 2S Li-Po compatible electronic ignition for easy starts and dependable operation. An updated intake design helps improve fuel delivery and throttle response, while a Walbro carburetor with a rotating-barrel design tailored for four-stroke engines ensures steady fuel delivery in any attitude. An engine heat sink helps maintain cooling under demanding conditions. The package comes complete with mufflers, engine standoffs, and an engine mount for straightforward installation.

Designed for serious scale modeling, the FG-90R3 provides robust, realistic power for large airframes without adding external size. Its increased displacement translates to practical performance and a favorable power-to-weight balance, while the integrated ignition and cooling features support consistent operation. For fuel, use Red Line or Power Model synthetic oil in a 16:1 to 20:1 mix to keep the engine running cleanly and reliably.