Yamaha F25SMHA v13 Owner's Manual 2015

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Year 2015

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Yamaha F25SMHA v13 2015 Specification

The Yamaha F25SMHA v13 2015 is a lightweight and efficient outboard motor designed for small to medium-sized boats. This model features a two-cylinder, four-stroke engine with a displacement of 432cc, providing a reliable power output of 25 horsepower. The engine is equipped with a SOHC (Single Overhead Camshaft) design, which optimizes performance and fuel efficiency. With an emphasis on easy operation, the F25SMHA includes a manual start system and a tiller handle for straightforward control.

The motor boasts a compact and streamlined design, contributing to its portability and ease of installation. Its dry weight is approximately 59 kilograms, making it one of the lightest in its class. The Yamaha F25SMHA is also equipped with a shallow water drive system, allowing for improved maneuverability in low water conditions.

For durability, the F25SMHA features a high-output alternator designed to provide a steady supply of power for onboard electronics. It includes Yamaha's advanced corrosion protection system, which enhances the longevity of the motor by using a combination of coatings, materials, and anodes.

The Yamaha F25SMHA is compliant with the latest emission standards, ensuring an environmentally friendly operation. It employs a carburetor fuel system with a prime start choke, which simplifies starting procedures and enhances reliability. The motor's gear shift is located on the front of the engine for convenient access, and it operates with a gear ratio of 2.08:1, optimizing performance across various speeds.

This model is designed for those seeking a balance of performance, portability, and efficiency, making it an ideal choice for recreational boating and small-scale fishing activities.

Yamaha F25SMHA v13 2015 F.A.Q.

How do I perform basic maintenance on my Yamaha F25SMHA outboard motor?

Basic maintenance includes regularly checking and changing the engine oil, inspecting the fuel system for leaks, cleaning the fuel filter, checking the spark plugs, and inspecting the propeller for damage. Regular lubrication of moving parts is also recommended.

What is the recommended oil type for the Yamaha F25SMHA?

The recommended oil type for the Yamaha F25SMHA is Yamalube 4M 10W-30 or 20W-40, depending on the ambient temperature in which the motor will be used.

How can I troubleshoot starting issues with my Yamaha F25SMHA?

If you're experiencing starting issues, check the battery for a full charge, ensure the fuel tank is filled and the fuel valve is open, inspect the spark plugs for wear, and verify that the emergency stop switch is not engaged.

What should I do if my Yamaha F25SMHA is overheating?

If overheating occurs, check for blockages in the water intake, ensure the water pump impeller is functioning correctly, and verify that the cooling system is not clogged. Replacing the impeller may be necessary if it's damaged.

How often should I replace the spark plugs on my Yamaha F25SMHA?

It's recommended to inspect and, if necessary, replace the spark plugs every 100 hours of operation or at least once per boating season.

What steps should I take to winterize my Yamaha F25SMHA?

To winterize your motor, stabilize the fuel, flush the engine with fresh water, fog the cylinders with fogging oil, change the engine oil and gear oil, and store the motor in a dry, protected environment.

How do I adjust the idle speed on my Yamaha F25SMHA?

To adjust the idle speed, locate the idle adjustment screw on the carburetor. Turn the screw clockwise to increase idle speed or counterclockwise to decrease it. Refer to the owner's manual for the recommended idle RPM.

What should I do if my Yamaha F25SMHA has poor acceleration?

Poor acceleration can be caused by a dirty fuel filter, fouled spark plugs, or propeller damage. Check these components, clean or replace them as necessary, and ensure the throttle linkage is properly adjusted.

How do I change the gear oil in my Yamaha F25SMHA?

To change the gear oil, remove the drain plug and the vent plug from the lower unit, allow the old oil to drain completely, and then refill with new gear oil through the vent hole until it starts to overflow. Replace the plugs securely.

What is the break-in procedure for a new Yamaha F25SMHA?

The break-in procedure involves running the motor at varying speeds for the first 10 hours. For the first hour, operate at no more than half throttle. For the next hour, alternate between half and three-quarter throttle. During the remaining 8 hours, avoid full throttle and vary the engine speed.