Mercury - FourStroke 175 - 300hp
FourStroke 175 - 300hp3.4L V6 and 4.6L V8 Reliability, flexibility, power and efficiency – all within your reach. Backed by decades of marine power innovation and product leadership, Mercury V8 and V6 FourStroke outboards deliver legendary performance and forward-thinking technology. FourStroke outboards are built for any body of water and a wide variety of boats. |
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Intuitive, Innovative Features |
Adaptive Speed ControlAdaptive Speed Control maintains a desired rpm regardless of changes in load or conditions without adjustments to the throttle lever position – a first for the outboard industry. |
Smooth and QuietThe V8 and V6 FourStroke engines are quieter and smoother than the leading competitor. |
Easy to MaintainThe exclusive Top Cowl Service Door simplifies routine maintenance, letting you check or add engine oil without removing the top cowl. An hour-based maintenance schedule decal is located under the cowl, providing a quick overview of routine maintenance. |
Industry-Exclusive Battery Management TechnologyWhen battery voltage is low, engines will automatically increase idle rpm to boost alternator output and charge batteries to the proper level, protecting batteries from draining while trolling and operating electronic devices. |
Ample Charging OutputFourStroke models feature a robust alternator that delivers 20 amps net of charging power at idle and 30 amps total at wide-open throttle. |
Quick AccelerationThe high-displacement, quad-cam design of the V8 and V6 FourStroke powerheads generates plenty of torque, especially at mid-range. |
Superior Fuel EconomyAdvanced Range Optimization improves cruise-speed fuel efficiency by automatically adjusting fuel delivery so seamlessly the operator won’t feel or hear it. |
Light and CompactMercury V8 and V6 FourStroke outboards are the lightest in their respective class by at least 10 pounds and mount on 26-inch centers for broader fitment. |
Go Farther:Advanced Range Optimization by Mercury Marine uses closed-loop fuel control to precisely adjust the fuel mixture and deliver the best possible efficiency. |
Lighter by Design:Ounce by ounce, Mercury engineers cut pounds from the FourStroke outboards, ensuring each engine is the lightest in its respective class. |
Keep It Steady:Adaptive Speed Control maintains engine speed (rpm) regardless of load or condition changes – such as rough water, tight turns, tow sports and lower speeds on plane – without having to frequently adjust throttle position, a first for the outboard industry. |
Smart Charging:Idle Charge battery-management prevents boaters from draining their batteries while operating multiple electronic devices. When battery voltage is reduced, the engine will automatically increase idle rpm to boost alternator output and recharge low batteries to the proper level. |
| Horsepower | 300 | 250 | 225 | 200 | 175 |
| Engine type | V8 | V8 | V6 | V6 | V6 |
| Displacement (CID/CC) | 279 CID | 279 CID | 209 CID | 209 CID | 209 CID |
| Displacement (L) | 4.6L | 4.6L | 3.4L | 3.4L | 3.4L |
| Cylinder Configuration | V-8 [64 degree] with Dual Overhead Cam [DOHC] and 32-valves | V-8 [64 degree] with Dual Overhead Cam [DOHC] and 32-valves | V-6 [64 degree] with Dual Overhead Cam [DOHC] and 24-valves | V-6 [64 degree] with Dual Overhead Cam [DOHC] and 24-valves | V-6 [64 degree] with Dual Overhead Cam [DOHC] and 24-valves |
| Full throttle RPM | 5200-6000 | 5200-6000 | 5200-6000 | 5000-5800 | 5000-5800 |
| Alternator amp / Watt | 85-amp (1071 Watt) with Idle Charge | 85-amp (1071 Watt) with Idle Charge | 85-amp (1071 Watt) with Idle Charge | 85-amp (1071 Watt) with Idle Charge | 85-amp (1071 Watt) with Idle Charge |
| Starting | Electric Start with SmartStart Protection | Electric Start with SmartStart Protection | Electric Start with SmartStart Protection | Electric Start with SmartStart Protection | Electric Start with SmartStart Protection |
| Steering |
Hydraulic (standard) |
Big Tiller (optional) Hydraulic (standard) Power (optional) |
Big Tiller (optional) Hydraulic (optional) Hydraulic (standard) Joystick Piloting for Outboards Power (optional) |
Big Tiller (optional) Joystick Piloting for Outboards |
Big Tiller (optional) Hydraulic (optional) Joystick Piloting for Outboards Power (optional) |
| Shaft length |
20" / 508 mm 25" / 635 mm |
20" / 508 mm 25" / 635 mm 30" / 762 mm |
20" / 508 mm 25" / 635 mm 30" / 762 mm |
20" / 508 mm 25" / 635 mm |
20" / 508 mm 25" / 635 mm |
| Gearcase ratio | 1.75:1 | 1.75:1 | 1.85:1 | 1.85:1 | 1.85:1 |
| Dry weight *Lightest model available | 505 lbs / 229 kgs | 505 lbs / 229 kgs | 505 lbs / 229 kgs | 505 lbs / 229 kgs | 470 lbs / 213 kgs |
| Trim system | Power trim and tilt | Power trim and tilt | Power trim and tilt | Power trim and tilt | Power trim and tilt |
SmartCraft. Boating with a Higher IQ.SmartCraft® is a full suite of digital technologies, fully integrated and totally coordinated. Gauges, sensors, vessel systems, computer-controlled features – one total package, one high level of control. Make your boating experience easier, safer and a lot more enjoyable. |
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5344_V-6_V-8_Compare Chart 300hp.pdf