Diagnostic
Cause: Gearcase seal or component failure allowing water ingress Test: Visually inspect drained lubricant for water separation or milky discoloration
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Ask Boat Guru about thisSpec · Mercury or Quicksilver High Performance Gear Lubricant
Procedure · 1. Drain and refill the gearcase lubricant (refer to Gearcase Lubrication).
Spec · 800 ml (27.1 fl oz) conditions={"gearcase_type":"Standard"}
Procedure · 1. Place the outboard in a vertical operating position. 2. Remove the propeller. Refer to Propeller Replacement. 3. Place the drain pan below the outboard. 4. Remove the vent plug (a) and fill/drain plug (b) and drain...
Diagnostic · Cause: Abnormal gear wear inside gearcase Test: Examine drained lubricant for metal particle size and quantity; a small amount is normal, excessive amount or large chips indicates abnormal wear