2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Manual, PN 5005483, Page 173Get this manual
GEARCASE TRIM TAB ADJUSTMENT Install the spacer, engaging the propeller shaft splines
TRIM TAB ADJUSTMENTWARNING
Improper trim tab adjustment can cause difficult steeringA propeller will generate steering torque when the propeller shaft is not running parallel to the water's surfaceThe trim tab is adjustable to compensate for this steering torqueA single trim tab adjustment will relieve steering effort under only one set of speed, motor angle, and load conditionsNo single adjustment can relieve steering effort under all speed, motor angle, and load conditions
Thrust bushing Spacer Cotter pin Propeller Nut
Wedge block of wood between propeller blade and the anti-ventilation plateInstall the propeller nut and torque to 120 inIbs(13.6 Nm)If cotter pin holes in the propeller nut and propeller shaft are not aligned, continue to tighten the nut until they are in lineDo not loosenInsert new cotter pin through the propeller nut and shaftBend its ends over the nut to secure the assemblyRemove block of wood