2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Manual, PN 5005483, Page 62Get this manual
MAINTENANCE SUBMERGED ENGINES Install all removed or disconnected partsRun the outboard below 1500 RPM for one-half hour on 50:1 fueloil ratio
Engine Dropped Overboard (Running)
Follow the same procedures as Engine Dropped Overboard (Not Running)However, if there is any binding when the flywheel is rotated, it may indicate bent connecting rod and no attempt should be made to start the outboardPowerhead must be disassembled and serviced immediately
Engine Dropped Overboard (In Salt Water)
Follow the same procedures used for Engine Dropped Overboard (Not Running) and Engine Dropped Overboard (Running)Disassemble and clean outboards that have been submerged in salt water for prolonged periods of timeElectrical components must be cleaned or replaced as necessary