Yamaha F20B Owner's Manual

Also see for F-20B: Owner's manual Owner's manual Service manual Owner's manual Installation manual

Contents

Maintenance6012. If the “Fogging Oil” is not available, runthe engine at a fast idle until the fuel sys-tem becomes empty and the enginestops.13. Drain the cooling water completely outof the motor. Clean the body thoroughly.14. If the “Fogging Oil” is not available, re-move the spark plug(s). Pour a tea-spoonful of clean engine oil into eachcylinder. Crank several times manually.Replace the spark plug(s).15. Drain the fuel from the fuel tank.16. Store the fuel tank in a dry, well-ventilat-ed place, not in direct sunlight.EMU28402Lubrication1. Install the spark plug(s) and torque toproper specification. For information onspark plug installation, see page 67.2. Change the gear oil. For instructions,see page 72. Inspect the oil for the pres-ence of water that indicates a leaky seal.Seal replacement should be performedby an authorized Yamaha dealer prior touse.3. Grease all grease fittings. For further de-tails, see page 66.TIP:For long-term storage, fogging the enginewith oil is recommended. Contact yourYamaha dealer for information about foggingoil and procedures for your engine.EMU28443Flushing power unitPerform this procedure right after operationfor the most thorough flushing.NOTICEECM01530Do not perform this procedure while theengine is running. The water pump maybe damaged and severe damage fromoverheating can result.1. After shutting off the engine, unscrewthe garden hose connector from the fit-ting on the bottom cowling.2. Screw the garden hose adapter onto agarden hose, which is connected to afresh water supply, and then connect itto the garden hose connector.3. With the engine off, turn on the water tapand let the water flush through the cool-ing passages for about 15 minutes. Turnoff the water and disconnect the gardenhose adapter from the garden hose con-nector.4. Reinstall the garden hose connectoronto the fitting on the bottom cowling.Tighten the connector securely. NO-1. Fitting2. Garden hose connector3. Garden hose adapterZMU05556132