1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 239Get this manual
CLAMPSWIVEL BRACKETSDRIVE SHAFT HOUSING
2Apply Loctite 271 to threads of both coupling boltsIMPORTANT: Secure coupling in vice when tightening the first bolt to prevent bending of the link rod3Secure coupling to looped end link rod (only) using first bolt4Tighten bolt on flat of looped end link rod to torque of 50 lbin(5.7 Nm)5Apply mark on hooked end link to indicate full engagement into the coupling6Temporally remove hooked end link rod from coupling and start second bolt into front coupling holeDo not tighten at this timeIMPORTANT: Make sure second bolt doesn't protrude into coupler bore at this time