Yamaha 25MLHF Owner's Manual

Pages 80

Year 2007

Language(s)

of 80

Yamaha 25MLHF Specification

The Yamaha 25MLHF is a robust and reliable 25-horsepower outboard motor designed for a variety of marine applications. It features a two-stroke engine, which is renowned for its simplicity, lightweight design, and excellent power-to-weight ratio. This engine configuration allows for quick acceleration and efficient performance, making it ideal for small boats or fishing vessels that require dependable thrust and maneuverability. The motor is equipped with manual start functionality, ensuring reliability even in remote locations without access to electrical systems.

The 25MLHF includes a long shaft length, which is particularly suited for boats with deeper transoms, providing optimal propulsion and stability in diverse water conditions. Its compact design not only eases installation but also facilitates straightforward maintenance and transportation. The motor utilizes Yamaha's advanced engineering technologies to enhance fuel efficiency while minimizing emissions, aligning with environmental standards and offering a cost-effective operation over time.

In terms of construction, the Yamaha 25MLHF is built with high-quality materials to withstand harsh marine environments. This durability is complemented by its corrosion-resistant coating, extending the motor's life and maintaining performance integrity. Additionally, Yamaha's reputation for reliability ensures that the 25MLHF delivers consistent performance, backed by comprehensive service and parts support. Overall, the Yamaha 25MLHF is a versatile and efficient choice for boaters seeking a dependable outboard motor with a balance of power, longevity, and ease of use.

Yamaha 25MLHF F.A.Q.

How do I start the Yamaha 25MLHF outboard motor?

To start the Yamaha 25MLHF, ensure the gear shift is in neutral, attach the safety lanyard, prime the fuel system by squeezing the primer bulb until firm, and then pull the starter cord quickly and firmly.

What type of fuel is recommended for the Yamaha 25MLHF?

The Yamaha 25MLHF should use regular unleaded gasoline with a minimum octane rating of 87. Avoid using fuel with more than 10% ethanol content.

How should I perform regular maintenance on the Yamaha 25MLHF?

Regular maintenance includes checking and changing the engine oil, inspecting the fuel system, cleaning the spark plugs, and checking the propeller for damage. Follow the maintenance schedule in the owner's manual.

What is the correct oil type for the Yamaha 25MLHF?

Use Yamalube 4M FC-W 10W-30 or 20W-40 engine oil, or a marine engine oil of equivalent quality.

How can I troubleshoot starting issues with the Yamaha 25MLHF?

Check the fuel supply, ensure the safety lanyard is attached, verify the gear is in neutral, inspect the spark plugs, and check for any clogged fuel filters.

What should I do if the Yamaha 25MLHF overheats?

Stop the engine immediately, check for obstructions in the water intake, ensure proper oil levels, and inspect the impeller for wear or damage.

How do I properly store the Yamaha 25MLHF for the winter?

Flush the engine with fresh water, drain the fuel system or add a fuel stabilizer, change the oil, apply fogging oil, and store in a dry place, preferably indoors.

What steps should I take if the Yamaha 25MLHF vibrates excessively?

Check the propeller for damage or imbalance, ensure the engine is mounted securely, and inspect the engine mounts for wear.

How do I adjust the idle speed on the Yamaha 25MLHF?

Locate the idle adjustment screw on the carburetor and turn it incrementally while the engine is running until the desired idle speed is reached.

What should I do if the Yamaha 25MLHF has poor acceleration?

Inspect the fuel system for clogs, check the air filter, ensure the carburetor is clean, and verify the spark plugs are in good condition.