1984-1986 Mercury Force 9.9 and 15HP Outboards Service Manual, Page 84Get this manual
8Remove nylon bearings from bore of bracket9Loosen set screw on magneto control shaft retainer10Remove magneto control shaft gear as follows:
Remove and replace seal (steering handle grip dampener)and forward seal on handleReplace steering handle shaft gearif teeth are badly worn or broken Replace steering handle shaft spring pin, if bentReplace large nylon washersif necessary
A Pull gear awaylrom boss on bracketBCDrive outspring pin that secures gears to shaftRemove gearF
4Magneto control shalt and gearABReplace magneto control shaft gear, if teeth ar badly worn or broken Replace magneto control shaft gear spring pin if bent