Yamaha F20A Service Manual

Also see for F25A: Service manual Owner's manual Service manual Owner's manual Owner's manual

3-2INSPADJ ECOWLING/FUEL SYSTEM/CONTROL SYSTEMPERIODIC SERVICECOWLINGWater separator drain hole1. Inspect:l Water separator drain holeObstruction → Clean.FUEL SYSTEMFuel line1. Inspect:l Fuel lineCracks/damage/leaks → Replace thedefective part(s).Fuel filter replacement1. Inspect:l Fuel filterClogs/cracks/leaks → Replace.Foreign matter → Clean.2. Replace:l Fuel filter (new)CAUTION:The flange side of the fuel filter must facetowards the fuel joint.CONTROL SYSTEMThrottle link rod1. Check:l Throttle valve full-open positionIncorrect → Adjust.2. Adjust:l Throttle link rodAdjusting steps:l Loosen the screw 1.l Turn the throttle control lever 2 clock-wise (wide open throttle).l When the lever contacts the stopper 3hold it in that position.l Turn the throttle lever 4 clockwise sothat the throttle valve is fully opened.l Tighten the screw.l Operate the throttle control lever andcheck that the throttle valve turns fromfull-open to full-close.