2004 SR Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 164Get this manual
GEARCASE INSPECTION PROPELLER SHAFT COMPONENTS Inspect: Push rod Wear, breakReplace Clutch shifter dog Chipping, wear, damageReplace Clutch dog pin Bent, wearReplace Propeller shaftsplines Wear, twisting, damageReplace Measure: Clutch return spring free length
Clutch return spring free length Standard Service limit 70 mm (2.755 in) 68 mm (2.677 in)