Nissan NS40D Owner's Manual
![Nissan NS40D Outboard Motor manual cover](/images/BOYacyURgCEqugXyoGnIxyTq/thumbs/thumb175x175.webp)
The recommended fuel mixture for the Nissan NS40D is 50:1, which means 50 parts gasoline to 1 part two-stroke engine oil.
Check the fuel level and ensure the fuel is fresh. Inspect the spark plugs for wear or damage and clean or replace them if necessary. Also, verify that the kill switch is in the proper position.
Drain all fuel from the system, flush the engine with fresh water, apply fogging oil to the cylinders, and store the motor in a dry, upright position.
It is recommended to change the gear oil every 100 hours of operation or at least once per season.
The recommended spark plug for the Nissan NS40D is NGK BR7HS-10. Always check the owner's manual for any updates.
To adjust the idle speed, locate the idle adjustment screw on the carburetor and turn it slowly while the engine is running until the desired idle speed is achieved.
An overheating issue can be caused by a clogged water intake or a faulty impeller. Check and clean the water intake and replace the impeller if necessary.
Excessive smoke can be due to an incorrect fuel mixture or a dirty carburetor. Ensure the fuel mixture is correct and clean the carburetor.
Regular maintenance includes checking and replacing the spark plugs, cleaning the carburetor, changing the gear oil, inspecting the fuel lines, and lubricating moving parts.
Reduced power can be caused by a fouled spark plug, a clogged fuel filter, or a dirty carburetor. Inspect these components and clean or replace them as needed.