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4.6L V-8 Pro XS Series

Brief Summary

The new 4-stroke Mercury Pro XS replaces the 2-stroke OptiMax series of engines which have been discontinued. Like the OptiMax, the Pro XS specializes in having high low-end torque and lightweight. It has been specially designed for the demands of bass boat, multi-specie, and saltwater inshore anglers.

Key Features

  • Highest displacement in its class
  • 8 cylinders, DOHC
  • Digital Throttle and Shift (DTS) available
  • 85 Amp alternator
  • Idle Charge Battery management
  • Transient Spark Calibration for More torque
  • Adaptive Speed Control
  • Advanced Range Optimization
  • Handy oil check and fill
  • Handle to easily remove the cowl
  • Recommended 87 Octane Fuel
  • 6200 max RPM


Type of Engine 4-Stroke
Number of Cylinders 8
Horse Power 250
Weight 505.00lbs
Fuel Type Gasoline
Fuel Delivery
Shaft Length Options 20'' (50.8 cm), 25'' (63.5 cm)
Shift Throttle Control
Displacement 279.00cu in
Steering Control
Recommended Fuel 87 Octane
Alternator Output 85 Amps total
CARB Rating 3-Star
Engine Monitoring System

Captain's Report