Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 101Get this manual
THROTTLE PLATE SCREW IMPORTANT: DO NOT adjust throttle plate stop screw from factory settingThe throttle plate clearance is set 0.070 in(01.77mm) (#50 drill)Contact the Mercury Marine Technical Service Department for proper adjustment procedure Throttle Position Sensor (TPS) Adjustment (All Models)
The Throttle Position Sensors are not adjustableTPS settings can be monitored with the Digital Diagnostic Terminal through the ECMIf TPS settings are not within specifications, replace Throttle Position Sensors as required