Drive gear on starter motor

[bald tom]

The drive gear on the electric starter motor (Prestolite, I believe as it has 4 brushes and the drive gears are totally exposed) for my 1972 100HP Evinrude no longer spins up to engage the flywheel. The starting motor and gear spin quite rapidly, but the drive gear no longer rises to the occasion. (pun intended) Any suggestions on how (or what) to fix (in the drive gear), and even perhaps why this is happening, would be appreciated.

[Michael j]

Correct cranking amp battery fully charged clean & tight battery cables. If all that is ok make sure the bindix is not stuck down & spray lite oil on the shaft.