The Saito™ FG-90R3 engine is an updated version of the FG-84R3D. The displacement has been increased while the physical dimensions remain the same. This provides a modest increase in power and makes it a drop-in replacement for the FG-84R3D.

This engine is a scale-modelers delight, delivering the incredible sound and smooth reliability that Saito has built their reputation on. Above and beyond the advantages of a 4-stroke gasoline operation, this is the engine for those who like to run clean and efficient engines. Accompanied by Saito power and precision craftsmanship, the distinguished look and sweet sound, this is the engine many of you have been waiting for. This engine provides easy starts and reliable performance due to the 2S Li-Po-compatible electronic ignition. The Walbro carburetor features a rotating barrel specially made for 4-stroke engines, ensuring reliable fuel feed and outstanding performance at any attitude. An engine heat sink provides better cooling and performance in demanding conditions. Supplied complete with mufflers, engine mount, and electronic ignition.

As an expert in reliable 4-stroke engines, Saito engineers spend years developing the best-built 4-stroke gasoline engines. The power-to-weight ratio of a Saito engine creates a one-of-a-kind flying experience. For serious modelers, the FG-90R3 is here with the quality, sound and precision craftsmanship Saito is known for.



Key Features

Increased-displacement version of the FG-84R3D

2S Li-Po battery compatible ignition provides easy starts and reliable performance

Engine heat sink for improved cooling and performance

Amazing 4-stroke sound Saito™ engine sound

Updated intake design

Complete with electronic ignition, mufflers and engine standoffs



Specifications :

Stroke Volume: 89.99cc

Bore: ø37.2mm x 3

Stroke: 27.6mm x 3

Weight:

Body - 3,161g | Muffler - 157g | Stand-Off Mount - 64g (16gx4) | Ignition System - 250g approx.

Pratical Speed: Approx 1,300 ~ 7,000rpm (Recommended highest speed on ground: 5,500 ~ 6,500rpm)

Recommended 2-bladed Prop: D24" x P12"- D25" x P10" (Standard)

Fuel flow: Approx. 40cc/min (at full throttle, approx 6,200 rpm) Fuel flow varies depends upon propeller load. More fuel flow with larger load and less fuel flow with smaller (In actual flight, fuel flow somewhat increases).

Static thrust: 8-9kgf (Dependent on the Prop size)

Battery for Ignition: Voltage - 6-9V | Capacity - recommended over 1,000mAh