OMC Lower Half Maintenance???

[Rickster400]

I have rebuilt 1983 1.6L OMC - everything under the hood! What maintenance - water pump, oil, etc in lower unit or routine checks do I need to make to prevent any problems there??? Engine runs fine, just trying to think ahead! Is there a maintenance manual for this motor?<br /><br />Thank you! & thanks for all who gave input in helping me restore this motor!