Wire Color Code Abbreviations; Sensors; Crankshaft Position Sensor - Mercury 15 EFI FourStroke Service Manual

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Wire Color Code Abbreviations

The crankshaft position sensor (CPS) is a hall effect switch, which senses the collapse of a magnetic field. The CPS is located

at the top of the cylinder block, next to the flywheel.

There is a timing key (indentation) in the flywheel casting, below the ring gear, and when the key passes the CPS, the CPS

generates an electric pulse. This pulse is sent to the engine control module (ECM). The timing and frequency of the pulse

allows the ECM to regulate ignition and fuel injector timing. If the CPS fails, the engine will run rough or stop running.

Wiring Diagram

90-8M0125265 eng NOVEMBER 2017

Wire Color Abbreviations

ECM connector

CPS connector

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20 efi fourstroke