300 HP FourStroke

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The new Mercury 300hp FourStroke is precision engineered from skeg to cowl. Packed with advanced technology to improve all aspects of performance and reliability. the Robust 4.6 Litre V-8 engine is designed to minimise weight and maximise fuel economy. Delivering Mercury’s best ever FourStroke hole shot, top speed and fuel efficiency. The 300hp FourStroke now comes with a 3+3=6 Year factory warranty.


These robust motors deliver Mercury’s best-ever FourStroke hole shot, top speed and fuel efficiency. Great for aluminum fishing, deck, inflatable rigid hull, inshore fishing, offshore fishing and runabouts and tritoons.


Price POA
Price Base POA
Brand Mercury
Model 300 HP
Length 0.00 Feet
Hull Type
Hull Style
Engine Make Mercury
Condition New
HP / kW 300 / 224
Engine Type V-8
MidSection Conventional MidSection
Displacement (CID/CC) 279 CID
Displacement (L) 4.6L
Cylinder Configuration V-8 [64 degree] with Dual Overhead Cam [DOHC] and 32-valves
Full throttle RPM 5200-6000
Air induction Performance-Tuned Long-Runner Intake Manifold
Fuel induction system Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization
Alternator amp / Watt 85-amp (1071 Watt) with Idle Charge
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 Start with SmartStart Protection
Controls Remote Mechanical or Digital Throttle & Shift (DTS)
Steering Hydraulic (standard)
Power (optional)
Shaft length 20″ / 508 mm
25″ / 635 mm
Gearcase ratio 1.75:1
Dry weight *Lightest model available 527 lbs / 239 kgs
CARB star rating 3
Bore and Stroke 3.6 in x 3.4 in / 92 mm x 86 mm
Ignition SmartCraft PCM 112 Digital Inductive
Cooling system Water-cooled with thermostat
Gear shift F-N-R
Gearcase options 5.44″
Trim system Power trim and tilt
Exhaust system Through prop
Counter Rotation Available
Color Cold Fusion White
Pearl Fusion White
Phantom Black
Warm Fusion White
Lubrication system Integrated wet sump
Oil Capacity 7.0 Quarts / 6.6 Liters
Maximum Trim Range 20° (-6° to 14°)
Maximum Tilt Range 73° (-6° to 67°)
Engine Serial V-8
Displacement 4.6
Horse Power 300
Fuel Type Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Steering Hydraulic (standard) Power (optional)
Stroke 4-Stroke


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