Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 69Get this manual
34 Turn key switch to the
position
Crank Position Sensor Adjustment
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 .02mm 0.51mm)) If not, loosen bracket screws, set gap to specificationand retighten screws to 105 lbin11 .S N.m) IMPORTANT: Crank Position Sensor must be perpend icular to flywheel tooth3Reinstall flywheel cover
Loosen screws securing TPI to bracket
a Screws