Honda BF15D BF20D Outboard Motors Shop Manual., Page 354Get this manual

Honda BF15D BF20D Outboard Motors Shop Manual., Page 354

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cINSPECTION DOWN RELIEF VALVE SEAT
Check the manual valve and seal washer for wear or damage and deteriorationReplace if it is damaged or deteriorated[I] SEAL WASHER

SPOOL VALVES