1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 385Get this manual
11Slide brass barrel over throttle cable tubeSecure barrel to tube with allen screw approximately 3.5 in(89 mm) from stainless conduitDO NOT OVERTIGHTEN screw as tubing may be crushed binding throttle cablePosition barrel to face towards tiller handle 13Position throttle arm slot to face stop harness exit hole in tiller handleRoute stop switch harness through twist grip, into throttle arm, and out through side of tiller handle51602
Slot Exit Hole Harness Twist Grip Stop Switch
14Secure twist grip to throttle arm with attaching screw51607 Brass Barrel Tube Allen Screw Tiller HandleScrew