• Propshaft Rated HP250 (187 kW)
• Full Throttle RPM Range5000-6000
• CylindersV-6 (60° vee)
• Displacement ( cu.in/cc)185/ 3032
• Bore in/mm3.63/92
• Stroke in/mm3.00/76
• Induction System2-Stage Direct Fuel Injection
• IgnitionPCM Digital Inductive
• Alternator System60-amp (756 watt) w/Voltage Regulator
• Gear Ratio1.62:1, 1.75:1
• Fuel/Oil RatioElectronic Multipoint
• Recommended OilMercury Racing 2-Stroke Oil
• Required Fuel87 Octane Minimum (R+M)/2 (92 RON)
• RotationRight-Hand Sport Master
• Shaft Length in/mm20/508
• Weight lbs/kg505/229
• Warranty2-year limited for recreational boating, 3-year limited corrosion, up to 3 years of Mercury Product Protection (MPP) available

• Two-year limited warranty for recreational boating and three-year limited corrosion warranty
• Features the SmartCraft Engine Guardian system, which monitors engine functions to forewarn of possible problems that could lead to engine damage
• The direct fuel injection air compressor features a lightweight pulley, along with the use of maxi-coated carbon steel bolts for enhanced compressor durability
• Electronic multipoint lubrication system delivers precise amounts of oil where and when it’s needed.
• High-performance rubber-coated reed blocks cushion five-petal, single-stage carbon fiber reeds for enhanced reed life without sacrificing performance
• A heavy-duty propshaft enhances the durability of the 3.0-liter Sport Master gearcase
• 3.0-liter Sport Master gearcase features a radial discharge stainless water pump for improved engine cooling
• 3.0L (185 CID) powerhead delivers unmatched power, performance, durability and reliability
• The 60-amp, belt-driven alternator is the most powerful in its class
• Solid upper and lower mounts and the race-proven Sport Master gearcase enable the 250XS to power single engine, lightweight hulls to speeds in excess of 85 mph
• The Mercury-exclusive PCM microprocessor provides the ability to optimize fuel, spark timing and knock control for each cylinder independently, enhancing engine running quality and performance
• Exceeds the fuel efficiency of many of today’s large four-stroke engines
• Runs on 87-octane fuel
• The 250 Sport XS features a higher air/fuel pressure differential than production engines, enhancing running quality.
• SmartCraft Control Area Network (CAN) system, a network of sensors and actuators, proactively monitors and controls multiple engine functions
• Comes equipped with a 14-pin Deutsch connector harness, which incorporates engine ignition and the SmartCraft CAN wiring in one connector
• Solid engine mounts improve engine response and overall boat performance at higher speeds
• A unique two-stage, direct-injection system atomizes fuel into small, uniform particles, resulting in complete and instantaneous combustion
• The fuel/air mixture is injected into the combustion chamber at 95 psi (15 psi higher fuel/air differential than standard DFI or OptiMax product) for enhanced high-RPM running quality
• The Sport Master gearcase, featuring a satin-finished housing enhanced by a race-proven torpedo shape featuring less frontal area, reduces drag and provides increased water flow
• Suitable For: Bass Boats, Single Engine Catamaran Sport Boats, River Racers, Single Engine Vee Bottom Sport Boats

Technical Contact

If you have a question that’s not answered in our FAQs or you need additional information, please contact us at the phone numbers listed below.

Mercury Racing Technical Services Hours
Monday through Friday
7:30 a.m. – 4:30 p.m.
(Central Time)

Outboard & Sterndrive Consumer Affairs
(920) 924-2088
(Calls may be recorded for quality purposes)

Mercury Racing Product Technical Publications
Service manuals, parts manuals; operation, maintenance, and warranty manuals.
(920) 929-5110
FAX: 920-929-4894

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