Nissan NS25C3 Owner's Manual

Nissan NS25C3 Outboard Motor manual cover

Pages 60

Year 2007

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of 60

Nissan NS25C3 Outboard Motor Specification

The Nissan NS25C3 Outboard Motor is a robust and efficient marine propulsion system designed for small to medium-sized watercraft. It features a 25 horsepower, two-stroke engine that delivers reliable performance and optimal fuel efficiency. The motor is equipped with a carburetor induction system, which ensures smooth acceleration and consistent power output. It utilizes a water cooling system with a thermostat to maintain optimal engine temperature, enhancing durability and efficiency.

The engine displacement is 429 cm³, providing ample power for various marine activities. The NS25C3 includes a manual recoil start mechanism, which is straightforward and reliable, ensuring ease of use even in remote locations. The motor is designed with a 50:1 fuel-to-oil ratio, which combines precision in fuel mixing with reduced smoke emissions, contributing to a cleaner operational experience.

The outboard motor is lightweight, with a compact design for easy transportation and installation. It features a 360-degree steering capability, offering exceptional maneuverability and control. The NS25C3 also incorporates a shallow water drive system, allowing for navigation in low-depth areas without compromising the propeller.

The construction of the Nissan NS25C3 is focused on durability, with anti-corrosion treated components and a heavy-duty aluminum alloy casing, ensuring longevity even in harsh marine environments. It is designed to meet stringent emission standards, making it an environmentally conscious choice for marine enthusiasts. Overall, the Nissan NS25C3 is engineered to provide robust performance, reliability, and efficiency, making it a versatile option for a wide range of boating applications.

Nissan NS25C3 Outboard Motor F.A.Q.

How do I properly start the Nissan NS25C3 outboard motor?

To start the Nissan NS25C3, ensure the fuel tank is filled and the fuel line is connected. Open the fuel vent on the fuel tank. Set the throttle to the start position, and ensure the gear lever is in neutral. Pull the choke out if the engine is cold, then pull the starter rope firmly. Push the choke in as the engine warms up.

What is the recommended maintenance schedule for the Nissan NS25C3 outboard motor?

Perform regular maintenance every 100 hours or annually, whichever comes first. This includes checking and replacing the engine oil, inspecting the fuel system, cleaning or replacing the spark plugs, and checking the propeller for damage.

How can I troubleshoot if the NS25C3 outboard motor won't start?

First, check the fuel level and ensure the fuel line is properly connected. Verify that the kill switch is in the correct position and that the battery is charged if it’s an electric start model. Inspect the spark plugs for wear or damage, and ensure the choke is functioning properly.

What type of fuel is recommended for the Nissan NS25C3 outboard motor?

Use regular unleaded gasoline with a minimum octane rating of 87. Avoid fuel with more than 10% ethanol content to prevent damage to the engine.

How do I winterize my Nissan NS25C3 outboard motor?

To winterize the motor, drain the fuel system or add a fuel stabilizer. Change the engine oil and lower unit oil. Flush the engine with fresh water, and spray fogging oil into the cylinders to prevent corrosion. Store the motor in a dry, well-ventilated area.

How can I identify and fix overheating issues with the NS25C3?

Check the water intake for blockages and ensure the water pump is functioning correctly. Clean the cooling passages and replace the impeller if necessary. Make sure the thermostat is operational and not stuck closed.

What should I do if the Nissan NS25C3 motor is vibrating excessively?

Inspect the propeller for damage, such as dents or bends. Ensure the propeller is securely fastened and balanced. Check the engine mounts for wear or looseness, and tighten or replace them as needed.

How do I replace the spark plugs on the NS25C3 outboard motor?

Disconnect the spark plug wires and use a spark plug socket to remove the old plugs. Check the gap on the new plugs and adjust if necessary. Install the new plugs by hand to avoid cross-threading, then tighten them with a socket. Reattach the spark plug wires.

What is the best way to clean and maintain the exterior of the NS25C3?

Rinse the exterior with fresh water after each use to remove salt and debris. Use a mild detergent and a soft brush to clean the surface. Wax the motor periodically to protect the finish and prevent corrosion.

How do I adjust the idle speed on my Nissan NS25C3 outboard motor?

Locate the idle speed adjustment screw on the carburetor. Turn the screw clockwise to increase the idle speed or counterclockwise to decrease it. Ensure the engine is running smoothly and does not stall at low speeds.