2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 76Get this manual
MAINTENANCE SUBMERGED ENGINES Make sure all oil injection hoses are clean and filled with oilReplace fuel and oil filters (4050 PL Models) as neededInject small amount of outboard lubricant into spark plug holes and install new spark plugsInstall all removed or disconnected partsRun the outboard below 1500 RPM for one-half hour on 50:1 fueloil ratio
Engine Dropped Overboard (I 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 asessary