Nissan NSF9.9B Owner's Manual
![Nissan NSF9.9B Outboard Motor manual cover](/images/VydknSQXLULzXaBXFXVwmwoK/thumbs/thumb175x175.webp)
The recommended fuel type for the Nissan NSF9.9B is unleaded gasoline with a minimum octane rating of 87.
Check the fuel level, ensure the fuel tank vent is open, inspect the spark plug for wear or damage, and verify that the kill switch is in the correct position.
Perform regular maintenance every 100 hours or annually, including changing the engine oil, checking the fuel system, and inspecting the propeller and anodes.
To change the oil, warm up the engine, remove the oil drain plug, allow old oil to drain, replace the drain plug, and refill with new oil to the recommended level.
Check the water intake for blockages, ensure the water pump impeller is functioning, and verify that the cooling system is free of debris.
Ensure the propeller is balanced and free of damage, check the engine mounts for wear, and inspect the drive shaft for any misalignment or damage.
For the first 10 hours, operate the engine at varying speeds, avoiding full throttle, and frequently check for proper oil and fuel levels.
Flush the cooling system with fresh water, stabilize the fuel, change the oil, and store the engine in an upright position in a dry place.
The recommended spark plug for the Nissan NSF9.9B is NGK BR6HS-10 or equivalent. Ensure it is gapped correctly to 0.9 mm.
Locate the idle speed adjustment screw on the carburetor, and turn it clockwise to increase or counterclockwise to decrease the idle speed, ensuring the engine runs smoothly.