SAITO FG-30 (AAC) CE 4-Cycle Gasoline Engine

Introduction

This manual provides essential information for the safe and effective operation of the SAITO FG-30 (AAC) CE 4-cycle gasoline engine. Designed with an emphasis on high performance, durability, and weight saving, this engine is ideal for advanced model airplane enthusiasts. Please read this manual thoroughly before installation and operation.

Specifications

? Specifications are subject to change without notice.

Safety Precautions

⚠️ WARNING: Failure to follow these safety precautions can result in serious injury or death.

• Always operate engines in a well-ventilated area.
• Keep hands, hair, and loose clothing away from the rotating propeller.
• Never run the engine indoors.
• Use appropriate safety glasses ? when operating or testing the engine.
• Ensure the engine is securely mounted to the aircraft structure.
• Handle fuel with care; store it in approved containers away from heat sources.
• Allow the engine to cool completely before performing maintenance.
• Do not operate the engine if any damage is observed.
• Keep children and pets away from the operating area.

Installation

Proper installation is crucial for engine performance and safety.

Mounting

The FG-30 engine is designed for radial mounting. Ensure the mounting structure is robust and can withstand engine vibrations. Use the provided mounting bolts and secure them tightly.
[Diagram Description: A visual representation showing the engine mounted to a firewall, with arrows indicating the direction of mounting bolts passing through the engine mount and into the firewall.]

Fuel System

Connect the fuel tank to the carburetor using fuel-resistant tubing. Ensure the fuel line is routed away from heat sources and moving parts. A fuel filter is recommended.
[Diagram Description: An illustration of the fuel system setup, showing the fuel tank, fuel line, fuel filter (optional), and connection to the carburetor inlet.]
Use a fuel mix of gasoline and high-quality synthetic oil at a ratio of 25:1 to 30:1. ⛽

Exhaust System

Attach the supplied exhaust pipe securely to the exhaust port. Ensure the exhaust gases are directed away from the model's airframe and pilot.
[Diagram Description: A diagram showing the exhaust port on the engine cylinder and the connection point for the exhaust pipe.]

Propeller Mounting

Securely attach the propeller to the engine crankshaft using the propeller hub and bolts. Ensure all bolts are tightened evenly.
[Diagram Description: A close-up view of the crankshaft end with a propeller mounted, showing the propeller hub and bolts.]
✈️ Recommended propeller sizes are 15x8 to 17x8 inches.

Operation

Engine Break-in

A proper break-in procedure is essential for engine longevity.

1. Mix fuel with oil at a 25:1 ratio for the initial break-in period (approximately 10-15 flights or 2-3 hours of run time).
2. Start the engine and run it at approximately 2,000-3,000 RPM for 5-10 minutes, allowing it to warm up.
3. Gradually increase the throttle to about half, then back down. Repeat this cycle.
4. Avoid prolonged periods at full throttle during the break-in.
5. After the break-in period, you can switch to the recommended 30:1 fuel/oil ratio.

Starting Procedure

1. Ensure the propeller is securely mounted and the engine is properly installed.
2. Check fuel level and connections.
3. Set the choke (if applicable) and prime the carburetor gently.
4. Advance the throttle to a slightly open position.
5. Ignite the engine using an electric starter or by hand-pulling (with extreme caution and proper technique).
6. Once the engine starts, gradually move the choke to the open position.
7. Adjust the idle speed as needed.

? Always use a reliable electric starter for safety and ease of starting.

Maintenance

Regular maintenance ensures optimal performance and extends the engine's life. ⚙️

• After Each Flight: Wipe down the engine to remove dirt and oil residue. Check for any loose parts or damage.
• Fuel System: Periodically inspect fuel lines for cracks or leaks. Clean or replace the fuel filter if installed.
• Ignition System: Check the spark plug for wear and proper gap. Ensure the ignition module is securely mounted.
• Carburetor: Clean the carburetor air filter if present. Adjustments may be needed after break-in or if performance changes.
• Lubrication: Ensure the correct fuel/oil mixture is used. The engine is lubricated by the oil in the fuel.
• Storage: If storing the engine for an extended period, drain the fuel tank and run the engine dry to prevent fuel system corrosion.

Troubleshooting

If you encounter issues, consult the following common problems:

Engine will not start:

• Check fuel supply and mixture.
• Ensure spark plug is firing (check for spark).
• Verify ignition timing is correct.
• Check for air leaks in the fuel system or intake.
• Ensure throttle is not fully closed for starting.

Engine runs poorly or stalls:

• Check fuel filter for clogging.
• Adjust carburetor high and low-speed needles.
• Ensure proper fuel/oil mixture.
• Check for overheating.
• Verify propeller is correctly sized and balanced.

? For persistent issues, contact SAITO SEISAKUSHO CO., LTD. or an authorized service center.

Warranty and Support

SAITO SEISAKUSHO CO., LTD. provides a limited warranty on its products. Please refer to the separate warranty document or visit the official SAITO website for details.
For technical support or service inquiries, please contact:
SAITO SEISAKUSHO CO., LTD.
[Website URL placeholder: e.g., https://www.saito-engines.com/]