2001-2014 Honda BF/BFP8D, BF/BFP9.9D Outboards Shop Manual, Page 170Get this manual
BFBO-BFS.SO VALVE GUIDE REAMING
For best results, be sure the cylinder head is at room temperature before reaming the valve guides1) Coat the reamer and valve guide with cutting oil2) Rotate the reamer clockwise through the valve guide the full length of the reamer3) Continue to rotate the reamer clockwise while removing it from the valve guide4) Thoroughly clean the cylinder head to remove any cutting residue 5) Check the valve guide bore; it should be straight, round and centered in the valve guide Insert the valve and check operationIf the valve does not operate smoothly, the guide may have been bent during installation Replace the valve guide if it is bent or damaged6) Check the stem-to-guide clearance (P10-14)