Honda BF35A-BF45A Outboard Motors Shop Manual., Page 108Get this manual
VALVE SEAT WIDTH Measure the valve seat widthSTANDARD SERVICE LIMIT 2.0 mm (0.08 in)
1.25- 1.55 mm (0.049-0.061 in)
If the valve seat width is under the standard, or over the service limit, recondition the valve seatSee page 9-15,
ROCKER ARM SHAFT O.DMeasure the O.Dof the rocker arm shaftSTANDARD 13.976- 13.994 mm (0.5502-0.5509 in) SERVICE LIMIT
13.95 mm (0.549 in)
Replace the rocker arm shaft its O.Dis smaller than the service limit
ROCKER ARM I.DMeasure the I.Dof the rocker arm