How to change gear box oil in outboard motor - Boating

Keep the gas in your outboard new/clean with new oil every 6 months..Keep your motor covered when not in use, Dirt dabbers (dobbers) will build nest under the hood and break loose and ruin your motor, ,,Change your water pump and thermostate every year when motor is used a lot.....Dont run stainless steel props on small hp motors ,when you hit a log it will bend your prop shaft costing big $$$ to replace..Ck your lower gear oil if water is noted ,replace lower seals...Dont buy used motors unless you run a compression ck....ck for water in gear case , Dont buy 4 strokes to heavy to slow to many parts AND are being replaced by fuel injection 2 strokes .... Dont buy FORCE motors not made by mercury no parts being made and or extink and pure junk . Etex best motors , .