2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 200Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 200

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THEORY OF OPERATION
- Intake silencerMAP sensorThrottle position sensor (Located on #1 throttle body)IAC motorThrottle bodies with throttle valvesIntake air temperature sensor (Located on lower