Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 112Get this manual

Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 112

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HONDA BFeOAae5A

CYLINDER HEAD
Remove carbon deposits from the combustion chamberClean off any gasket material from the cylinder head surfaceCheck the spark plug holes and valve area