













SeaPro - more power for the job
Ideal for commercial fishing, commercial workboats and law-enforcement boats. Available with joystick piloting, electro-hydraulic power steering and Mercury’s Advanced MidSection (AMS). The Advanced MidSection virtually eliminates vibration being transmitted to the boat, while joystick piloting provides maximum control and manoeuverability.
The new Mercury SeaPro V-8 and V-6 outboard models bring more of everything to the job—more displacement, more power, more efficiency and more durability. The impressive muscle of our new 4.6-litre V-8 and 3.4-litre V-6 powerheads is specifically designed for commercial duty and delivers our best-ever fuel economy. The combination of ample torque and low weight makes these engines ideal for heavily-loaded boats. Guaranteed to do its job, so you can do yours.
Mercury 300 HP AMS SeaPro Specifications
HP / kW |
300 / 224 |
MidSection |
Advanced MidSection (AMS) |
Engine type |
V8 [64 degree] with Dual Overhead Cam [DOHC] and 32-valves |
Displacement (CID/CC) |
279 CID |
Displacement (L) |
4.6L |
Full throttle RPM |
4800-5600 |
Air induction |
Performance-Tuned Long-Runner Intake Manifold |
Fuel induction system |
Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization |
Alternator amp / Watt |
115-amp (1449 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 25W-40 (Optional 10W-30 for Cold Conditions) |
Engine protection operator warning system |
SmartCraft Engine Guardian |
Compatible with SmartCraft digital technology |
Yes |
Starting |
Electric Start with SmartStart Protection |
Controls |
Digital Throttle & Shift (DTS) |
Steering |
Joystick Piloting for Outboards |
Shaft length |
20" / 508 mm 25" / 635 mm 30" / 762 mm |
Gearcase ratio |
1.75:1 |
Dry weight *Lightest model available |
600 lbs / 272 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 |
Colour |
Phantom Black |
Oil Capacity |
7.0 Quarts / 6.6 Litres |
Maximum Trim Range |
20° (-6° to 14°) |
Maximum Tilt Range |
73° (-6° to 67°) |