Pro XS 300

A New Era in Performance

Mercury Pro XS® outboards are engineered for those boaters who demand ultimate performance – anglers competing on the highly competitive tournament trails and powerboaters who simply crave speed and acceleration. Exclusive components and tuning extract every ounce of performance from each Pro XS model so you can take it to the limit.

Intuitive, Innovative Features

TorqueMaster Gearcase

The lightweight TorqueMaster gearcase (featured on select V8 models) has a 1.75:1 gear ratio and a robust 1.25-inch-diameter prop shaft designed for semi-surfacing, high-speed applications.

Adaptive Speed Control

Adaptive Speed Control maintains a desired rpm regardless of changes in load or conditions without adjustments to the throttle lever position – a first for the outboard industry.

Performance-Tuned Exhaust

Exhaust tone has been fine-tuned to provide a brawny performance-inspired sound quality that’s unmistakable on the water yet quieter than competing high-output engines.

Transient Spark Technology

Transient Spark Technology electronically adjusts the ignition timing of the engine as needed. This subtle, automatic change produces additional torque for faster hole shot and acceleration.

Extra Charging Power

A powerful alternator provides net charging output of 20 amps at idle and 85 amps at wide open throttle. Idle Charge battery-management technology automatically increases idle rpm to boost alternator output and recharge low batteries.

Engine Specifications by Horsepower

Horsepower Pro XS 300
Displacement (CID/CC) 279 CID
Displacement (L) 4.6L
Cylinder Configuration V-8 [64 degree] with Dual Overhead Cam [DOHC] and 32-valves
Full throttle RPM 5600-6200
Alternator amp / Watt 85-amp (1071 Watt) with Idle Charge
Starting Electric Start with SmartStart Protection
Steering Hydraulic (standard)
Power (optional)
Shaft length 20" / 508 mm
25" / 635 mm
Gearcase ratio 1.75:1
Dry weight *Lightest model available 505 lbs / 229 kgs
Trim system Power trim and tilt

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