1974 Johnson 40 HP Outboard Motors Service manual, Page 16Get this manual
SUBMERGED MOTORS If mo tor is lost overboard while running, it should always be dis assembled before any attempt is made to start itOften internal parts are sprwlg and running under thes conditions can result in permanent damage
A motor lost overboard in salt water should al ways be disassembled and cleaned before starting is attemptedSome materials used in modern engines are subject to very rapid corrosion in the presence of salt water and should be inspected to determine if replacements are requiredA motor lost overboard in fr esh water can usually be safely started
providing no sand or silt is presentRemove the spark plugs, the carburetor orifice screw, and drain all fue Hnes and tankPull the starter until all water present has been expelledSquirt outboard lubricant into spark plug holesReassemble and startIf sand has en tered the engineno attempt at starting hould be madeDisassemble and clean the powerhead