MERCURY 2.5L Optimax 100 HR Service: Lower Unit Gear Lube & Water Pump (Part 5
lower unit service for your Mercury 2.5L Optimax! This is Part 5 of the full 100-hour annual maintenance series where we focus on the lower unit to ensure peak performance and reliability on the water. What We Cover in Part 5: In this step-by-step tutorial, you'll learn how to perform the lower unit maintenance on your 2.5L Optimax outboard. We walk through the complete process: Draining and inspecting the old gear lube. Removing the lower unit assembly. Replacing the old water pump impeller and kit. Reassembling the unit with fresh gear lube. Time Stamps for Quick Reference (Recommend adding these to your video): 1:45 - Draining Gear Lube & Visual Inspection 5:30 - Lower Unit Removal 10:15 - Water Pump Impeller Replacement 18:40 - Reinstalling the Lower Unit 23:50 - Gear Lube Refill Procedure Mercury Gear Lube Oil Mercury Water Pump Kit Gear Lube Pump Torque Wrench Gasket Sealer 2.5L Optimax #MercuryMaintenance #BoatMotorService #100HourService #OutboardRepair #WaterPumpImpeller #LowerUnitGearLube #BassBoatWorx
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