Yamaha 115-225 HP Outboards Service Manual, Page 55Get this manual
_ PERIODIC SERVICE D31600-0
CARBURETOR 1) Check the fuel passages and air passages for fouling or cloggingClean fouled parts with suitable cleaning solvent and blowout clogged passages with compressed air
AWARNING
Protect your eyes with suitable safety spectacles or safety goggles when using compressed air
2) Check the needle-valve for wear, and replace it if wornD319051