Maintenance44ble. Store the outboard motor in a dry, well-ventilated place, not in direct sunlight.EMU28301ProcedureEMU28380Flushing with the flushing attachment1. Wash the outboard motor body usingfresh water. For further information, seepage 46.2. Fill the fuel tank with fresh fuel and addone ounce of “Yamaha Fuel Conditionerand Stabilizer” (Part No. LUB-FUELC-12-00) to each gallon of fuel.NOTE:The use of “Yamaha Fuel Conditioner andStabilizer” eliminates the need to drain thefuel system. Consult your Yamaha dealer orother qualified mechanic if the fuel system isto be drained instead.3. Remove the top cowling and silencercover/cap. Remove the propeller.4. Install the flushing attachment over thecooling water inlet.CAUTION:ECM00300Do not run the engine without supplyingit with cooling water. Either the enginewater pump will be damaged or the en-gine will be damaged from overheating.Before starting the engine, be sure tosupply water to the cooling water passag-es.CAUTION:ECM00310Avoid running the outboard motor at highspeed while on the flushing attachment,otherwise overheating could occur.5. Cooling system flushing is essential toprevent the cooling system from clog-ging up with salt, sand, or dirt. In addi-tion, fogging/lubricating of the engine ismandatory to prevent excessive enginedamage due to rust. Perform the flush-ing and fogging at the same time.WARNINGEWM00090 Do not touch or remove electrical partswhen starting or during operation. Keep hands, hair, and clothes awayfrom the flywheel and other rotatingparts while the engine is running.6. Run the engine at a fast idle for 10–15minutes in neutral position while supply-ing fresh water.7. Just prior to turning off the engine, quick-ly spray “Yamaha Stor-Rite EngineFogging Oil” (Part No. LUB-STRRT-12-00) alternately into each carburetor/each intake manifold. When properlydone, the engine will smoke excessivelyand almost stall.8. Remove the flushing attachment andwipe off any excess water.9. Install the silencer cover/cap and topcowling. Install the propeller.1. Flushing attachment