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.
Pro XS 175 - 300hp
3.4L V6 and 4.6L V8
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 of every ounce of performance from each Pro XS model, so you can take it to the limit.
Intuitive, innovative features
TorqueMaster gearcase
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.
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.
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.
Performance-tuned exhaust
The exhaust tone has been fine-tuned to provide a brawny performance-inspired sound quality that is unmistakable on the water yet quieter than competing high-output engines.
Pro XS performance data
Unmatched power and speed
The V8 and V6 Pro XS outboards perform like no other, with a dual overhead cam design that delivers instantaneous throttle response and immediate power.
Superior fuel economy
Advanced Range Optimisation improves cruise-speed fuel efficiency by automatically adjusting fuel delivery so seamlessly the operator won’t feel or hear it.
Lightweight heavyweight
4.6L V8 and 3.4L V6 Pro XS outboards offer a combination of ample torque and less weight – ideal for heavier loaded boats.
Become a Mercury Insider
Sign up for our email list to hear about the latest Mercury product updates and news.
SmartCraft® The Power to Do More
SmartCraft® is a full suite of digital technologies, fully integrated and totally coordinated. Gauges, sensors, vessel systems, computer-controlled features – one total package, one high level of control. Make your boating experience easier, safer and a lot more enjoyable.
Engine Specifications by Horsepower
Warranty and Maintenance
Limited Warranty
World-class marine products backed by world-class warranties! We stand behind everything we build, and we go the extra mile to ensure your Mercury experience is the best it can be – on the water and off.
Mercury Product Protection
Mercury Product Protection is an extended service contract for your Mercury engine and MotorGuide trolling motor that covers certain expenses caused by defects in materials and workmanship after the Mercury Limited Warranty expires.
Maintenance
Take a deeper dive into what makes Mercury Pro XS outboards stand apart with detailed information on each engine and the features that make them unique.
Learn More About Pro XS Outboards at a Mercury Dealer
No one understands marine performance like your local Mercury Authorized Dealer. Contact a dealer today to learn how you could power your adventures with a Pro XS outboard.