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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.
Take your time on the water to a whole new level. Mercury FourStroke engines deliver unsurpassed power and performance in an efficient, reliable package. Tougher, smaller and lighter than any other four-stroke on the water, built to go the distance on a wide variety of boats and guaranteed to get you the most out of every adventure.
Mercury 300 HP Fourstroke V8 Specifications
HP / kW |
300 / 224 |
Engine type |
V-8 |
Displacement (CID/CC) |
279 CID |
Displacement (L) |
4.6L |
Cylinder Configuration |
V8 [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" x 3.4" / 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 |
Colour |
Cold Fusion White Pearl Fusion White Phantom Black Warm Fusion White |
Lubrication system |
Integrated wet sump |
Oil Capacity |
7.0 Quarts / 6.6 Litres |
Maximum Trim Range |
20° (-6° to 14°) |
Maximum Tilt Range |
73° (-6° to 67°) |