ARCO MerCruiser MPI Throttle Position Sensor

The ARCO replacement throttle position sensor is designed for compatible 1997-up MerCruiser MPI inboard engines. The supplier identifies GM-based 5.7L and 6.2L MPI applications, where the sensor reports throttle position to the engine-management system. A correct signal is important because the control module uses throttle input as part of fuel and ignition calculations. This is a direct sensor replacement for the specified electronic engine-control system rather than a universal adjustable sensor.

MerCruiser 803148 is the primary replacement number supplied for this sensor. OMC Stern Drive 3855296 and Volvo Penta 3855296 are also listed, along with Sierra 18-7757 and CDI Electronics E13-0008. Those cross references are useful on engines packaged or serviced under different marine brands. Compare the connector, mounting, and throttle-body location with the existing sensor before removing the original.

Inspect the connector terminals and nearby harness for corrosion, loose pins, or damaged insulation during replacement. If the engine-management system requires a relearn or diagnostic verification after sensor service, follow the applicable engine manual rather than guessing at adjustment. ARCO lists 12-month parts-and-labor warranty protection for the replacement component. Confirm stable throttle response and scan data after installation when diagnostic equipment is available.

• Designed for electronically controlled marine MPI applications
• Cross-references MerCruiser 803148
• Also cross-references OMC, Volvo Penta, Sierra, and CDI numbers
• Restores throttle-position input to the compatible engine-management system

For more engine sensors, ignition parts, and marine control components, Browse more Engine Controls & Ignition for related replacement and service components.