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SAITO Manuals & User Guides

Renowned Japanese manufacturer of high-performance 4-stroke gasoline and glow engines for radio-controlled model aircraft.

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Saito Seisakusho Co., Ltd., nailhan sa kadaghanan isip Saito Engines, is a premier Japanese manufacturer specializing in 4-stroke internal combustion engines for radio-controlled (RC) aircraft. Since its establishment, Saito has built a global reputation for engineering excellence, producing distinctively crafted engines known for their reliability, impressive power-to-weight ratios, and realistic exhaust sounds.

The company offers a diverse lineup ranging from single-cylinder gasoline and glow engines to intricate multi-cylinder radial engines, catering to scale modelers and hobbyists seeking authentic aviation performance. With a focus on precision manufacturing in Japan, Saito continues to set industry standards for 4-stroke model engine technology.

SAITO manuals

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SAITO FG-50ENG Petrol Engine Instruction Manual

Marso 10, 2025
SAITO FG-50ENG Petrol Engine Specifications Fuel The fuel is a mixture of regular gasoline or high-octane gasoline and high-quality 2-stroke engine oil. [Example of oil recommendation] Klotz KL-200 Original Techniplate…

FG-30B SaitoMotoren Engines Instruction Manual

Pebrero 11, 2025
Saito FG-30B Motoren Engines Specifications Bore Φ36.0mm Stroke 28.6mm Disp. 29.1cc Applications 4-stroke glow 120 class Weight (Approx.) Main body: 1,055g / Muffler: 90g / Ignition  100g RPM Range Approx.1,900-9,000rpm…

SAITO FA120R3 4 Stroke Motors RC Diesel Instruksyon

Disyembre 29, 2024
SAITO FA120R3 4 Stroke Motors RC Diesel Product Information Specifications Model: SAITO FA120R3 (AAC) Engine Type: 4-stroke Displacement: 19.18 cm3 Weight: Approximately 890g (with muffler) Accessories: 1 pc. each of…

SAITO FG-41TS Twin Petrol Engine Instruction Manual

Disyembre 28, 2022
FG-41ST Twin Petrol Engine Instruction Manual Specifications Bore: Φ32 mm x 2 Stroke: 25.4 mm x 2 Disp.: 40.9 cc Applications: Gasoline 30㏄ class Weight (Approx.): Main body: 1,350 g/Muffler: 100…

SAITO FG-21 Gasoline Engine Instruction Manual

Disyembre 26, 2022
FG-21 Gasoline Engine Instruction Manual Specifications Bore 032.0mm Stroke 26.0mm Disp. 20.9cc Weight (Approx.) Body: 690g / Muffler: 83g / Ignition system: 100g / Engine mount: 156g Applications 4-stroke glow…

SAITO FG-33R3 Engine User Manual and Specifications

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Comprehensive user manual for the SAITO FG-33R3 model aircraft engine, covering specifications, fuel requirements, ignition setup, propeller selection, break-in procedures, carburetor adjustment, tappet clearance, and warranty information.

SAITO FG-73R5 Modellflugmotor Bedienungsanleitung

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Umfassende Bedienungsanleitung für den SAITO FG-73R5 Radialmotor, einschließlich Spezifikationen, Kraftstoff, Zündung, Einlaufphase, Vergasereinstellung, Ventileinstellung und Wartung. Enthält detaillierte Diagrammbeschreibungen und eine Teileliste.

SAITO FG-90R3 3-Cylinder Model Engine Instruction Manual

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This manual provides detailed instructions for the SAITO FG-90R3 3-cylinder model engine, covering specifications, fuel requirements, ignition setup, propeller selection, engine break-in procedures, carburetor and valve adjustments, important notes, and…

SAITO FG-120TS Twin-Cylinder Gasoline Engine Instruction Manual

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Comprehensive instruction manual for the SAITO FG-120TS twin-cylinder gasoline engine, covering specifications, fuel mixture, ignition setup, propeller selection, engine break-in procedures, carburetor and valve adjustments, and important notes for model…

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SAITO video guides

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SAITO support FAQ

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  • What oil to gasoline mixture ratio should I use for Saito engines?

    For Saito gasoline engines, the recommended fuel mixture is regular or high-octane gasoline mixed with high-quality 2-stroke engine oil at a ratio of 15:1 to 20:1. A 15:1 ratio is strictly recommended during the break-in process.

  • How often should I check the valve clearance (tappet gap)?

    Valve clearance should be checked and adjusted after the initial break-in and subsequently every 2 hours of operation. This adjustment must be performed while the engine is cold.

  • What spark plug is recommended for Saito gasoline engines?

    Most Saito gasoline engines (such as the FG series) use the CM-6 spark plug. Refer to your specific engine manual for confirmation.

  • How should I break in my new Saito engine?

    The break-in process typically involves running the engine with a rich fuel mixture (15:1 ratio) for approximately 1 liter of fuel. The main needle should be opened approximately 3 turns from fully closed, and the engine should not be run lean during this phase.

  • Can I use ethanol-blended gasoline in my Saito engine?

    No, it is recommended to avoid using gasoline containing ethanol. Ethanol can cause power loss and lead to corrosion inside the engine components.