2017 Mercury Pro XS® 115 HP - 25 in. Shaft

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Pro XS® 115 HP - 25 in. Shaft



Incredible power, combined with light weight, gives you mind-blowing performance.

Ideal for freshwater bass or multispecies – and saltwater flats or bay boats.

  • Choice of Champions: Pro XS is the best-selling tournament fishing outboard in the world, and has powered more competitive anglers to victory than any other engine. Run with the same confidence professional tournament anglers have – trust Pro XS.
  • Keeps your battery charged: The Idle Charge feature monitors your battery’s voltage state, and will increase the engine rpm in order to provide up to 48% more battery charging at idle. This supports the greater power demands of today’s sophisticated marine electronics and accessories, letting boaters and anglers safely stay out on the water longer.
  • Exclusive Versatility: Two exclusive features give the 115 Pro XS the versatility to outperform on a wide range of applications: Available in two shaft lengths - 20" and 25" - this engine is an ideal option for a wide range of freshwater and saltwater boats; The Command Thrust model, compatible with Mercury’s larger-diameter propellers, helps quickly lift heavy boats onto plane and hold them there at lower speeds.
  • HP / kW: 115 / 86
  • Engine type: 8-valve single overhead cam (SOHC) Inline 4
  • Displacement (L): 2.1
  • Full throttle RPM: 5300-6300
  • Air induction: Performance-Tuned Scroll Intake Manifold
  • Fuel induction system: Computer Controlled Multi-Port Electronic Fuel Injection (EFI)
  • Alternator amp / Watt: 35 amp / 441 watt with water-cooled voltage regulator
  • Recommended fuel: Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
  • Recommended oil: NMMA Certified FCW SAE 10W-30
  • Engine protection operator warning system: SmartCraft Engine Guardian
  • Compatible with SmartCraft digital technology: Yes
  • Starting: Electric (turn-key); Smart Start Electric
  • Controls: Mechanical throttle & shift
  • Steering: Big Tiller Compatible; Dual cable mechanical; Hydraulic power steering
  • Shaft length: 25 in. / 635 mm
  • Gearcase ratio: 2.07:1
  • Dry weight *Lightest model available: 359 lb. / 163 kg
  • Bore and stroke: 3.5 x 3.2 /90 x 81
  • Ignition: SmartCraft ECM 07 Digital Inductive
  • Fuel system: Electronic Fuel Injection (EFI)
  • Cooling system: Water-cooled with thermostat
  • Gear shift: F-N-R
  • Gearcase options: Standard
  • Trim system: Power Tilt; Power Trim
  • Exhaust system: Through prop
  • Color: Phantom Black
  • Lubrication system: Wet sump
  • Oil Capacity: 5.5 qt. / 5.2 L
  • Maximum Trim Range: 22° (-6° to 16°)
  • Maximum Tilt Range: 70° (-6° to 64°)
Dry weight based on lightest model available.



Engine Type
8-valve single overhead cam (SOHC) Inline 4
Bore x Stroke
3.5 x 3.2 in. (90 x 81 mm)
2.1 L
Electric (turn-key); Smart Start Electric


Shaft Length
25 in. (635 mm)
359 lb. (163 kg)


Trim Method
Power Tilt; Power Trim
Propshaft Horsepower
115 hp (86 kW)
Full Throttle Operating Range
5300-6300 rpm
Gear Ratio / Shift
2.07:1 / F-N-R
Fuel Induction
Computer Controlled Multi-Port Electronic Fuel Injection (EFI)
35 amp / 441 watt
Water-cooled with thermostat
Big Tiller Compatible; Dual cable mechanical; Hydraulic power steering
3 Year Corrosion, 3 Year Limited

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