1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 190Get this manual
CYLINDER BLOCKCRANKCASE
Preparing Powerhead for Removal
1Drain engine oil (refer to "Changing Engine Oil" in Section 1B)
Remote Control Models
1Disconnect shift levera-Shift Lever b-Shift Link Rod 2Disconnect throttle linkagea-Throttle Linkage