FG-90R3 90cc 3-Cylinder Gasoline Radial Engine
Next Shipment February 2025

FG-90R3 90cc 3-Cylinder Gasoline Radial Engine

Item No.
Saito Engines - SAIEG90R3
4.4
$1,499.99
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Overview

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
  • Horizon Hobby recommends the use of Red Line or Power Model synthetic oil only, at a mix ratio of 16:1 – 20:1

Product Specs

Bore
37.2mm
Cylinder Type
Ringed piston
Cylinders
Radial
Displacement
90cc (6.0 cu in)
Engine (Only) Weight
111.5 oz (3,161g)
Ignition Weight
8.8oz (250g)
Muffler Type
10mm Flex Exhaust Pipes included
Muffler Weight
5.5oz (157g)
Oil Type & Content
Power Model 2T, or Red Line. 15:1 break in, 20:1 after.
Plug Type
CM6
Power Type
Gas
Prop 65
Prop 65 Warning Icon  California Residents Prop 65 WARNINGS.
Prop Range
24x10" - 25x12"
RPM Range
1,300 - 7,000
Stroke
27.6mm
Total Weight
125.9 oz (3,568g)

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