Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 100Get this manual
Throttle Cam Adjustment (1998 Models) 1Loosen cam follower screw allowing cam follower to move freely2Allow roller to rest on throttle camAdjust idle stop screw on throttle arm to align cam roller in the pocket of the throttle cam3Tighten roller arm screw to provide clearance of 0.005 in 0.005 in(0.127 mm 0.127 mm) between roller and cam
MAXIMUM THROTTLE
1Hold throttle arm against full throttle stop2Adjust full throttle stop screw to allow full throttle valve opening while maintaining 0.010 in(0.254 mm) clearance between arm of throttle shaft and stop on attenuator box3Tighten jam nut on full throttle stop screw4Check for free play (roller lifts from cam) between roller and cam at full throttle to prevent linkage from bindingReadjust full throttle stop screw, if necessary55982