Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 98Get this manual
DFI TimingSynchronizing Adjusting SPECIFICATIONS
19971998 MODELS FULL THROTTLE RPM RANGE IDLE RPM (IN FORWARD GEAR) 1997 MODELS 1998 MODELS MAXIMUM TIMING: WIDE OPEN IDLE TIMING SPARK PLUG 1997 MODEL 200 1998 MODEL 200225 FIRING ORDER THROTTLE POSITION SENSOR (INNER TPS) IDLE W.O.TTHROTTLE POSITION SENSOR (OUTTER TPS) IDLE WO.T50005750
Crank Position Sensor Adjustment (All Models)
1Remove flywheel cover2Using feeler gauge, measure the air gap between the crank position sensor and tooth on the flywheelIt should be 0.040 in 0.020 in[1.02 mm 0.51 mm)]If not, loosen bracket screws, set gap to specification, and retighten screws to 105 lbin(12.0 Nm)IMPORTANT: Crank Position Sensor must be perpendicular to flywheel tooth3Reinstall flywheel cover
650 550 Not Adjustable Controlled by ECM Not Adjustable Controlled by ECM Champion RC1 O-ECC NGK PZFR5F-11 or Champion RC12MC4 1-2-3-4-5-6