Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 85Get this manual
9) Apply marine grease to the O-ring and install the O-ring to the water pump housing 10) Install the water pump housing assembly to the gear case with the shift slider contacting surface facing toward the propeller side as shown and tighten the four 20 mrn flange boltsTORQUE: 12 Nm (1.2kgf-m, lbfft
11) Install the impeller gasket and impeller cover by align-
[I] IMPELLER COVER
ing the cutout with the boss of the water pump housing
[2] WATER PUMP
HOUSING
141 IMPELLER GASKET
12) Apply marine grease to the inside of the impeller liner, and install the impeller by turning it counterclockwise with the open end of the key groove toward the bottom of the motorAlign the holes of the impeller and pump liner