User manual YAMAHA 15HP 684K-1038247-1048513-2006 OR LATER

[. . . ] 9. 9 15 OWNER'S MANUAL U. S. A. Edition LIT-18626-06-56 63V-28199-19 ZMU01690 Read this owner's manual carefully before operating your outboard motor. Important manual information EMU31280 To the owner Thank you for choosing a Yamaha outboard motor. This Owner's Manual contains information needed for proper operation, maintenance and care. A thorough understanding of these simple instructions will help you obtain maximum enjoyment from your new Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer. [. . . ] When enough deposits collect, piston rings begin sticking. Performance drops and engine wear increases dramatically. EMU27120 Oil G EMU27130 Controls G G G G 19 Operation While many additives available may reduce deposits, Yamaha recommends the use of Ring Free Fuel Additive, available from your Yamaha dealer. Ring Free Fuel Additive has repeatedly proven its ability to clean combustion deposits from inside the engine, notably the critical piston-ring-land area, and fuel system components. Follow product labeling for use instructions. EMU27404 3. Gasoline and oil mixing (100:1) Gasoline to engine oil ratio Break-in period After break-in See page 18 100:1 Shake the fuel tank to mix the fuel thoroughly. Make sure that the oil and gasoline are mixed. If equipped with a built-in fuel tank 1. Pour oil into a clean fuel can, and then add gasoline. Replace the fuel can cap and close tightly. Shake the fuel can to mix the fuel thoroughly. Make sure that the oil and gasoline are mixed. Pour the gasoline and oil mixture into the built-in fuel tank. ECM00810 If equipped with a portable fuel tank 1. Pour oil into the portable fuel tank, and then add gasoline. CAUTION: G G G G Avoid using any oil other than the specified type. Use a thoroughly blended fuel-oil mixture. If the mixture is not thoroughly mixed, or if the mixing ratio is incorrect, the following problems could occur. Low oil ratio: Lack of oil could cause major engine trouble, such as piston seizure. High oil ratio: Too much oil could cause fouled spark plugs, smoky exhaust, and heavy carbon deposits. NOTE: If using a permanently installed tank, pour the oil gradually as the gasoline is being added to the tank. 1. Gasoline 2. Replace the fuel tank cap and close tightly. 20 Operation EMU27450 Operating engine EMU27461 2. Feeding fuel (portable tank) EWM00420 If there is a fuel joint on the motor, firmly connect the fuel line to the joint. Then firmly connect the other end of the fuel line to the joint on the fuel tank. WARNING G G G Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the water near you. When the air vent screw is loosened, gasoline vapor will be released. Gasoline is highly flammable, and its vapors are flammable and explosive. Refrain from smoking, and keep away from open flames and sparks while loosening the air vent screw. [. . . ] Do not touch the flywheel or other moving parts when the engine is running. Do not install the starter mechanism or top cowling after the engine is running. Do not touch the ignition coil, spark plug wire, spark plug cap, or other electrical components when starting or operating the motor. You could get an electrical shock. 4. 5. 6. 7. EMU29561 Prepare the engine for starting. [. . . ]