Nissan NSF9.9B2 Owner's Manual
![Nissan NSF9.9B2 Outboard Motor manual cover](/images/xxmamuYvTVUsMGzCGHAThMug/thumbs/thumb175x175.webp)
The recommended fuel type for the Nissan NSF9.9B2 Outboard Motor is unleaded gasoline with an octane rating of 87 or higher.
It is recommended to change the engine oil every 50 hours of operation or at least once per season, whichever comes first.
If the motor won't start, check the fuel level, ensure the fuel line is connected, check the spark plug for wear or damage, and verify that the kill switch is in the correct position.
To prevent corrosion, rinse the motor with fresh water after each use in saltwater, apply a corrosion inhibitor spray, and ensure all bolts and fittings are properly tightened.
During the first 10 hours of operation, avoid full-throttle operation and vary the engine speed to properly seat the engine components.
To adjust the idle speed, locate the idle adjustment screw on the carburetor and turn it clockwise to increase idle speed or counterclockwise to decrease it.
Before storing for winter, run the engine with a fuel stabilizer, change the oil, inspect and clean the spark plug, and drain the cooling system.
Check for blockages in the water intake, ensure the water pump is functioning properly, and inspect the thermostat for damage or debris.
The correct propeller size depends on the boat's weight and desired performance, but typically, a 9.25 x 10-inch propeller is used. Consult your owner's manual for specific recommendations.
To replace the spark plug, disconnect the spark plug wire, use a spark plug socket to remove the old plug, and install a new plug by tightening it to the manufacturer's specified torque.