Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 292Get this manual
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MAIN VALVE AND VALVE RETAINER (225F, L225F, 250B, L250BS225, L225, S250, L250)
REMOVINGINSTALLING THE MAIN VALVE AND VALVE RETAINER
JobPart Power trim and tilt unit Main valve O-rin