Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 65Get this manual
9) Remove the spark plug caps and spark plugs10) Make sure that the woodruff key on the crankshaft aligns with the center line of cylinder as shownIf necessary, turn the crankshaft using the crankshaft holder [I] CENTER LINE OF
CYLINDER
[41 CRANKSHAFT
CRANKSHAFT
I21 WOODRUFF KEY
11) Make sure that the#"timing mark on the timing IIdriven pulley aligns with themark on the cylinder headIf necessary align the mark by turning the driven pulley
1 TIMING BELT DRIVEN 1
12) Install new timing belt on the timing belt drive pulley and then on the driven pulley taking care not to allow the alignment marks to come out of alignment, 13) After installation, be sure that the alignment marks are in the proper alignment