The 300R FourStroke is the highest performing engine in its class. The naturally aspirated 4.6L V-8 provides an astounding 44% in increased displacement and up to 40% higher overall bottom end torque than the legacy two-stroke 300XS it replaces. Custom Racing intake cam profiles and short intake manifold runners maximise power throughout the rated speed range. An integrated oil cooler keeps oil temps down throughout the Racing exclusive 5800-6400 rpm operating range. Transient spark calibration boosts torque by 7% for unmatched acceleration. Advanced Range Optimisation (ARO) automatically adjusts fuel delivery for up to 10% improvement in cruise-speed fuel efficiency. All of this on regular 91-RON Unleaded fuel.
Spesification RATED HORSEPOWER (HP/KW)Â 300/224 BORE & STROKE (IN/MM)Â 3.6 X 3.4/92 x 86 IDLE RPMÂ 600 MAX RPM AT FULL THROTTLEÂ 5800-6400 CYLINDERS/ENGINE CONFIGURATIONÂ V-8 (64 degree) with 32-valve Dual Overhead Cam (DOHC) DISPLACEMENT (LITER/CID)Â 4.6/279 INDUCTION SYSTEMÂ Custom Racing Short-Runner Intake Manifold FUEL SYSTEMÂ Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization FUEL REQUIREMENTSÂ Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum IGNITION SYSTEMÂ SmartCraft PCM 112 Digital Inductive CHARGING SYSTEMÂ 85-amp (1071 Watt) with idle Charge STARTINGÂ Electric Start with SmartStart Protection LUBRICATION SYSTEMÂ Integrated wet sump OIL REQUIREMENTÂ NMMA Certified FCW SAE 10W-30 THROTTLE AND SHIFT CONTROLSÂ Mechanical and Digital Throttle and Shift (DTS) TRI-RAM MIDSECTIONÂ High-Durometer Elastomer Upper Mount and Solid Lower Mounts HEAVY DUTY MIDSECTIONÂ Solid Mounts; Remote Trim System GEARCASEÂ Torque Master, Sport Master or 5.44" HD GEAR RATIOÂ 1.75:1 CAMBERED SKEGÂ Sport Master and Torque Master GEAR SHIFTÂ F-N-R DRY WEIGHT (LBS./KG) L - 20"Â Std: 512/232; HD: 546/247 XL - 25"Â 556/252 XXL - 30"Â 566/257 WARRANTYÂ 3-Year Warranty Engine 1 Engine Make Mercury - Visit our website to view more products like this
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