Procedure
Submerged Outboard Motor Recovery Procedure
1. Remove the engine cover (refer to p. 88) and rinse the outboard motor with fresh water to remove salt water, sand, mud, etc. WARNING: A submerged outboard motor must be serviced immediately after recovery to minimize corrosion. Take to a Honda Marine dealership immediately if one is nearby. 2. Drain the vapor separator as described on pp. 110–111. 3. Change the engine oil and oil filter as described on pp. 91–93. If water was present in the engine crankcase or the used oil showed signs of water contamination, perform a second oil change after running the engine for half an hour. 4. Remove the spark plugs (refer to p. 95) and operate the starter to expel water from the engine's cylinders. 5. Put a teaspoon of engine oil into each spark plug hole to lubricate the inside of the cylinders, then reinstall the spark plugs. WARNING: If the engine was running when it submerged, there may be mechanical damage such as bent connecting rods. If the engine binds when cranked, do NOT attempt to run the engine until it has been repaired.