Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 347Get this manual
10) Process piece of piano wire of 1.5 rnm in diameter as shown11)Set the processed wire in the holes in both sides of the sleeve as shown, and secure the wire by inserting the 10 mm bolt into the sleeveRemove the sleeve from the valve body by pulling the wire with care not to damage the valve bodyRemove the O-ring from the sleeve and discard itReplace the O-ring with new one during reassembly [About 50 mm (1.0 in)
3mm (0.120.15 in)