2006 SD Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 87Get this manual
ELECTRICAL ELECTRIC STARTER SYSTEM Pinion and Over-Running Clutch Gear Inspect planetary gears and internal gear for wear, damage, or other abnormal conditionsReplace if necessary
Inspect pinion for wear, damage, or other abnormal conditionsCheck that clutch locks when turned in direction of drive and rotates smoothly in reverse directionReplace if necessary