The all-new 1550 dual calibration sterndrive features an advanced control system which enables the operator to switch engine power level via an electronic key fob. The Race key fob turns the engine into a pure bred race machine – pumping out one thousand five hundred and fifty horsepower on 112 AKI race fuel. The Pleasure key fob is selected when a more leisure ride is in order, creating 1350 h.p. on 91 octane (98 RON) fuel. Both fuel calibrations provide maximum torque and efficiency and are designed to optimize the engine performance at each power level.

Dual Calibration

This isn't just a valet key that reduces engine power,

each key fob changes the engine calibration for optimal

performance at each of the horsepower levels


The long flat torque curve of the engine

combined with Digital Throttle and Shift

allows the 1550 to rocket you to speed

with the smoothness and ease of a high-end

luxury vehicle throughout the full RPM range



The 32 valve quad cam valve train offers extreme

durability at high horsepower and engine speeds so

you can be confident in knowing that the engine

can handle anything you can


The combustion system provides fuel efficiency

rewards of 20 to 30% over similarly rated engines


Intercooler Filter

The Mercury Racing intercooler filter with stainless steel

element and housing is designed for ease of removal and cleaning.


Compatible with

M8 Drive

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K-Plane® Trim Tabs

Mercury Racing K-Planes® are the epitome of trim tab development, durability and performance. Originally designe

Zero Effort Digital® Controls

Mercury Racing Zero Effort Controls feature a canted handle design that really fits the hand. …



Rated Power at Transmission 1550/1350 (1156/1007 kW)
Full Throttle RPM Range 6200-6800 (1550 HP) / 6000-6500 (1350 HP)
Displacement Liter/CID 9.0/552
Bore (in/mm) 4.57/116
Stroke (in/mm) 4.21/107
Compression Ratio 7.8:1
Cylinder Arrangement V-8
Alternator (amp/watt) 105/1481
Controller Distributorless
Fuel System Sequential Fuel Injection
Fuel Requirements 112 AKI Required for 1550 Calibration / 91Octane (98 RON) Minimum for 1350 HP
Transmission Mercury Racinq Dry-Sump Hydraulic
Drive Unit Dry-sump M8R
Gear Ratio Application dependent (contact Mercury Racing for additional information)
Length (in/mm) 31/787 (from back of block)
Width (in/mm) 35/889
Height (in/mm) 29/737 (from crankshaft centerline)
Weight (lbs/kg) 1720/782
Warranty 10 hour warranty at the 1550 power level (at 2000 RPM or above) or 1 year, whichever comes first.
  • At 1550 hp, this is the fastest, most powerful consumer engine Mercury Racing has ever introduced
  • Turbo-compressor induction delivers a punch from holeshot to peak rev range, while pulse-timed exhaust tuning keeps turbos spooled, eliminating lag altogether
  • Monster, mesa-shaped torque curve ensures unwavering power through entirety of runtime by controlling boost and regulating torque at high engine outputs
  • Quad cam, four-valve, port fuel injection, and dry-sump efficiency deliver massive amounts of power with 9-liter displacement, matching high-performance marine propulsion with luxury-car-like drivability
  • 6800 RPM redline adrenalizes boat and boater alike
  • 35% stronger driveline and tough new CNC propellers allow engine to endure in both treacherous and ideal offshore conditions
  • M8R surface-piercing sterndrive with hydraulic transmission handles high torque and power levels with ease for improved handling and exceptional performance
  • Cylinder heads sport two cam shafts for a more robust valve train and enhanced power
  • 20-30% greater fuel economy rewards boaters with more on-water time than ever before
  • Common rail port injection and four-valve delivery reduces the total amount of fuel pumped and heightens metering accuracy
  • Compliant with EPA emissions requirements, increasing it's range without worry of stringent laws and regulations
  • Durable NiCom®-coated aluminum cylinder bores improve heat transfer and are one element which enables an increase in overall engine lifespan by up to an unprecedented 100%
  • Charge cooler is made of military-specification alloy so cooler corrosion is an enemy boaters don't have to fight
  • M8R drive increases power capacity by 35% over our world-champion Six drive, plus comes standard with an active anode for enhanced corrosion resistance
  • One-year factory warranty on 1350 calibration and support from world's largest marine service dealer network and Mercury Racing's T.E.A.M. accreditation program provides the best coverage in the industry
  • Suitable for: Catamaran Race, Catamaran Sport/Poker Runner, Sport Cruiser, Vee-Bottom Race, Vee-Bottom Sport/Poker Runner




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