2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 135Get this manual
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IGNITION
aThermoswitch retainerThermoswitch retainer mounting screw (M6 20)ThermoswitchThrottle position sensorThermoswitch harnessWire harness guide mounting screw (M6 35) Thermoswitch Retainer