Stern drive maintenance

[BroadHopper]

Look at you engine maintenance schedule. Keep track of the number of hours you use your boat each season. That will give you an idea of maintenance schedule.
In may case, I average 70 hrs a year. I scheduled with my mechanic that I replace the water pump one year, full drive maintenance the second year, and full tune up the third year. Then repeat. I have over 2000 hrs on my '88 454 and stern drive without any major repairs.