250R

The 250R FourStroke pumps out 250 propshaft horsepower. The stout V-8 powerhead provides an astounding 53% increased displacement and up to 40% higher overall bottom-end torque than the legacy two-stroke 250XS it replaces.

Transient spark calibration boosts torque by 7% for unmatched acceleration. Advanced Range Optimization automatically adjusts fuel delivery for up to 10% improvement in cruise-speed fuel efficiency. All of this on 87-octane (90 RON) pump fuel while maintaining a comparable weight to the 250 XS.

Best of all, the new 250R are backed by a three-year factory warranty.

Catalog

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Photo of 250R

The 250R FourStroke pumps out 250 propshaft horsepower. The stout V-8 powerhead provides an astounding 53% increased displacement and up to 40% higher overall bottom-end torque than the legacy two-stroke 250XS it replaces.

Transient spark calibration boosts torque by 7% for unmatched acceleration. Advanced Range Optimization automatically adjusts fuel delivery for up to 10% improvement in cruise-speed fuel efficiency. All of this on 87-octane (90 RON) pump fuel while maintaining a comparable weight to the 250 XS.

Best of all, the new 250R are backed by a three-year factory warranty.

Catalog

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  • Class Leading Performance

    Naturally aspirated, 4.6 Liter V-8; 53% higher displacement than the  3.0 Liter 250XS OptiMax.

     

  • Low Cost of Ownership

    250 rated horsepower on readily available 87 octane (90 RON) pump fuel while maintaining a comparable weight to the legacy two-stroke 250XS.

  • Unmatched Torque

    Class-leading 4.6L displacement resulting in 40% more bottom-end torque.

  • Exhilarating Acceleration

    Transient spark calibration boosts mid-range torque by as much as 7% for superior acceleration.

     

  • Enhanced Efficiency

    Advanced Range Optimization automatically adjusts fuel delivery for up to 10% improvement in cruise-speed fuel efficiency.

     

  • Class-leading Battery Charging

    High capacity alternator produces 42% higher charging output vs. the legacy 250XS OptiMax. Idle charge battery-management automatically increases engine idle rpm to boost alternator output, ensuring batteries are always charged to the proper level.

  • Easy Maintenance

    An industry-exclusive Top Cowl Service Door simplifies rouine maintenance with easy oil checks and oil fills without removing the cowl. Graphic, hour-based maintenance decals under the cowl for easy access to all regular powerhead maintenance points.

  • Maintenance Free

    Maintenance-free valve train for life of the engine.

  • Sports-Car-Like Drivability

    Tri-Ram midsection with high-durometer elastomer upper mount and solid lower mounts for enhanced handling at higher speeds.

  • Efficient

    The surface piercing Sport Master gearcase, designed for boats capable of speeds in excess of 85 mph, features low water pick-ups and a crescent leading-edge for maximized efficiency and speed.

  • Hand Crafted Propellers

    A full arsenal of custom Mercury Racing propellers are available to maximize performance in any application.

     

  • Color Options

    An optional Graphite Grey accent panel is available as a kit. A paint-ready kit is also available to custom match the engine to the boat.

  • Three year limited factory warranty

    The 250R is backed by a three year limited factory warranty with up to two additional years of Mercury Product Protection available.

Specifications

  • Rated Horsepower (HP/kW) 250/186
  • Bore & Stroke (in/mm) 3.6 x 3.4/92 x 86
  • Idle RPM600
  • Max RPM at Full Throttle5800-6200
  • Cylinders/Engine Configuration V-8 (64 degree) with 32-valve Dual Overhead Cam (DOHC)
  • Displacement (Liter/CID) 4.6/279
  • Induction System Performance-Tuned Long Runner Intake Manifold
  • Fuel System Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization
  • Fuel Requirements Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON
  • Ignition System SmartCraft PCM 112 Digital Inductive
  • Charging System 85-amp (1071 Watt)
  • Starting Electric Start with SmartStart Protection
  • Lubrication System Integrated wet sump
  • Oil Requirement NMMA Certified FCW SAE 10W-30
  • Throttle and Shift Controls Mechanical
  • Midsection Design Tri-Ram Midsection with High-Durometer Elastomer Upper Mount and Solid Lower Mounts
  • Shaft Length (in./mm.) 20/508
  • GearcaseSport Master
  • Gear Ratio 1.75:1
  • Weight (Lbs./Kgs.) 520/236
  • Warranty 3-Year Limited

High Performance Marine Engines