Yamaha F9.9CMHS v3 Owner's Manual

Pages 94

Year 2005

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Yamaha F9.9CMHS Specification

The Yamaha F9.9CMHS is a compact and lightweight outboard motor designed for portable and versatile use in a variety of marine environments. This engine is a part of Yamaha's portable series, offering an optimal blend of power and maneuverability for small to medium-sized boats. It features a two-cylinder, four-stroke engine configuration, providing a displacement of 212cc, which ensures a smooth and efficient performance with reduced emissions and noise levels. The motor delivers 9.9 horsepower, making it suitable for both recreational and utility applications, such as fishing or tender boats.

Equipped with a manual start system, the F9.9CMHS is designed for reliability and straightforward operation. The tiller handle includes an integrated gear shift lever, allowing for intuitive control and ease of handling. The engine is also fitted with a shallow water drive system, providing enhanced maneuverability in shallow waters and improving access to diverse aquatic environments.

The F9.9CMHS incorporates Yamaha’s advanced engineering with features like a CDI microcomputer ignition system for precise spark timing and enhanced fuel efficiency. It includes a high-output alternator, ensuring adequate power supply for onboard electronics and accessories. Additionally, the outboard motor is designed with a durable aluminum propeller and a robust transom clamp bracket for secure mounting.

Yamaha emphasizes corrosion resistance through the incorporation of a freshwater flush device and a zinc coating on key components, ensuring longevity and reliability in saltwater use. Weighing approximately 41 kg, the Yamaha F9.9CMHS is portable and easy to transport, making it an ideal choice for boaters seeking a powerful, yet manageable outboard motor solution.

Yamaha F9.9CMHS F.A.Q.

What is the recommended fuel type for the Yamaha F9.9CMHS?

The Yamaha F9.9CMHS is designed to run on regular unleaded gasoline with a minimum octane rating of 87.

How often should I change the engine oil in my Yamaha F9.9CMHS?

It is recommended to change the engine oil every 50 hours of operation or at least once per year, whichever comes first.

What is the procedure for winterizing the Yamaha F9.9CMHS?

Winterizing involves draining the fuel system, changing the oil, lubricating moving parts, and storing the engine in a dry place. It is advisable to consult the owner's manual for detailed instructions.

How do I troubleshoot if the Yamaha F9.9CMHS won't start?

Check the fuel level, ensure the fuel valve is open, inspect the spark plugs, and verify that the kill switch is in the correct position. If the problem persists, consult a professional technician.

What is the proper way to clean the Yamaha F9.9CMHS after use in saltwater?

Flush the engine with fresh water using the flushing port, wash the exterior with soap and water, and apply anti-corrosion spray to metal parts.

How can I improve the fuel efficiency of my Yamaha F9.9CMHS?

Regular maintenance, such as changing the oil, spark plugs, and using clean fuel, can improve fuel efficiency. Additionally, avoid overloading the boat and maintain a steady speed.

What type of oil is recommended for the Yamaha F9.9CMHS?

Yamaha recommends using Yamalube 4M FC-W 10W-30 or 20W-40 engine oil for optimal performance and protection.

How do I perform a propeller inspection on the Yamaha F9.9CMHS?

Remove the propeller and inspect for damage, such as dents or cracks. Check for fishing line or debris wrapped around the shaft and ensure the propeller nut is secure.

What are common causes of overheating in the Yamaha F9.9CMHS?

Overheating can be caused by a blocked cooling water intake, a faulty thermostat, or a failing water pump impeller. Regular maintenance can prevent these issues.

How do I adjust the idle speed on the Yamaha F9.9CMHS?

Idle speed can be adjusted using the idle adjustment screw located on the carburetor. Refer to the service manual for the recommended idle RPM and adjustment procedure.