2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 257Get this manual
GEARCASE ASSEMBLY While holding the detent balls in shifter shaft, carefully align holes in shifter shaft and clutch dog with slot in the propeller shaftInsert the shifter shaft into the propeller shaft until the detent balls slip into grooves in the propeller shaftSecure the pin with new retainer springPosition three coils over each end of the pinmaking certain no coils of the spring overlap
With holes in the clutch dog and shifter shaft lined up, insert wedge end of the tool with flat side facing end of detent springWhen the tool is flush with the clutch dog, press the retaining pin through the clutch dog, pushing out the toolMake tool locally