1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 357Get this manual
TILLER HANDLE
Tiller Handle Installation
1Secure tiller handle to steering arm with bolts, plate and bushing (align bushing with slot in steering arm)Torque bolts to 70 lb-in(8.0 Nm)aBolts-M10x80 (2)