2001-2014 Honda BF/BFP8D, BF/BFP9.9D Outboards Shop Manual, Page 188Get this manual
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SFBO-SFS.SO PISTON PINS
Service Ii it 1.08 mm (0 .043 in) 2.28 mm (0.090 in)
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3) Using piston, push the ring securely into the cylinder and measure the end gap