Nissan NS25 Owner's Manual

Pages 43

Year 2007

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of 43

Nissan NS25 Outboard Motor Specification

The Nissan NS25 Outboard Motor is designed to deliver robust performance and reliability for small to medium-sized boats. Powered by a two-stroke engine, the NS25 boasts a displacement of 429cc, ensuring efficient fuel combustion and optimal power output. The motor produces 25 horsepower, providing ample thrust for various boating activities, from fishing to recreational cruising. It features a manual recoil start system, allowing for straightforward engine ignition without the need for complex electronic components. The NS25 is equipped with a tiller handle steering system, offering intuitive control and maneuverability for the operator.

The motor's cooling system is water-cooled, enhancing engine longevity and performance by maintaining optimal operating temperatures. With a carburetor induction system, the NS25 ensures smooth and consistent fuel delivery, contributing to its reliable performance. The gear ratio of 2.08:1 optimizes torque and speed, allowing for efficient propulsion and handling in diverse water conditions. Engine trim and tilt options provide further control, enabling adjustments for improved performance and fuel efficiency.

Weighing approximately 52 kilograms, the Nissan NS25 is relatively lightweight, making installation and transport manageable. It incorporates anti-corrosion measures, including a high-grade aluminum alloy construction and a durable paint finish, ensuring resilience against saltwater environments. The motor features a built-in fuel tank with an external fuel line connection, offering flexibility for extended trips. With its compact design, the NS25 is suitable for a variety of boat transoms and is compliant with emissions regulations, reflecting Nissan's commitment to environmentally responsible engineering. The Nissan NS25 Outboard Motor combines power, efficiency, and durability, making it an ideal choice for boating enthusiasts seeking reliable performance on the water.

Nissan NS25 Outboard Motor F.A.Q.

How do I properly start the Nissan NS25 Outboard Motor?

Ensure the fuel tank is full and the fuel line is connected securely. Check that the gear is in neutral, then pull the choke out if the engine is cold. Pull the starter rope firmly until the engine starts, then gradually push the choke back in as the engine warms up.

What should I do if the outboard motor won't start?

Check the fuel supply and ensure the tank is not empty. Inspect the spark plugs for wear or fouling and replace if necessary. Verify that the kill switch is in the correct position. If the problem persists, consult the service manual or contact a professional technician.

How often should I perform maintenance on the NS25 motor?

Routine maintenance should be conducted every 100 hours of operation or at least once a year. This includes changing the engine oil, inspecting and replacing spark plugs, checking the fuel system, and cleaning the cooling system.

What is the recommended oil type for the Nissan NS25 outboard motor?

Use a high-quality, TC-W3 certified 2-stroke outboard motor oil. This ensures optimal performance and longevity for your engine.

How can I prevent the motor from overheating?

Regularly inspect and clean the water intake on the lower unit to prevent blockages. Ensure the cooling system is functioning correctly and replace the impeller every two years. Always operate the motor in water deep enough to cover the water intakes.

What are the common causes of poor performance in the NS25 motor?

Poor performance can be caused by incorrect fuel mixture, dirty carburetor, worn spark plugs, or improper propeller size. Regular inspection and maintenance can help identify and resolve these issues.

How do I winterize the Nissan NS25 outboard motor?

Flush the engine with fresh water to remove salt and debris. Add fuel stabilizer to the gas tank, and run the engine to circulate the stabilized fuel. Disconnect the fuel line and run the engine until it stops. Fog the cylinders with storage oil and store the motor in an upright position.

Why is my outboard motor vibrating excessively?

Excessive vibration can be caused by a damaged propeller, misaligned engine mounts, or debris caught in the propeller. Inspect and replace the propeller if necessary and ensure the engine is securely mounted.

How can I improve fuel efficiency on the NS25 motor?

Ensure the propeller is the correct size and pitch for the boat. Keep the boat hull clean from algae and barnacles. Maintain a steady speed and avoid rapid acceleration. Regularly service the engine for optimal performance.

What steps should I take if the motor stalls while running?

Check the fuel level and ensure the vent on the fuel tank is open. Inspect the fuel line for kinks or leaks. Verify the spark plug connection and condition. If the problem continues, consult a professional for further diagnosis.