Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 111Get this manual
CAM HEIGHT Measure the camshaft runout
STANDARD
24'073-24'313 mm (0.9478-0.9572 in)
24105-24345 mm (0.94900.9585 in)
SERVICE LIMIT
23.843 mm (0.9387 in)l 23.905 mm (0.941 in)-
Replace the camshaft if the cam height is lower than the service limit
CAMSHAFT JOURNAL O.DMeasure the camshaft
STANDARD
SERVICELIMIT