2026 Mercury FourStroke 300hp
Inventory Details
| Condition | New |
| Year | 2026 |
| Make | Mercury |
| Model | FourStroke |
| Trim | 300hp |
| Stock Number | SN-421 |
| Category | Marine |
| Sub Category | Motor - outboard |
| Colour | Black / Cold Fusion White / Warm Fusion White / Pearl Fusion White |
| Alternator/Charging System | 85-amp (1071 Watt) with Idle Charge |
| Displacement (cc) | 4.6L |
| Engine Horsepower | 300 |
| Engine Type/Details | V8 |
| Weight - Aprx. | 527 |
| Cylinders | 8 |
FourStroke 250-300hp
3.4L 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.
Intuitive, Innovative Features
Adaptive Speed Control
The Adaptive Speed Control feature lets you maintain engine rpm despite changes in load or conditions. Climbing large swells is easier. Cruising at low speeds is smoother. Carving out tight turns is effortless.
Smooth and Quiet
Featuring a large muffler and a vibration-dampening cowl design, Mercury V8 FourStroke outboards deliver an exceptionally smooth, quiet ride at any speed.
Easy to Maintain
The 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.
Ample Charging Output
A powerful alternator delivers 85 amps of charging power at wide-open throttle – perfect for keeping onboard electronics running long into the fun.
Industry-Exclusive Battery Management Technology
When needed, the idle charge battery management system works for you by monitoring battery voltage and adjusting engine rpm at idle to boost alternator output.
FourStroke Performance Data
Exceptionally Smooth & Quiet
The V8 300hp FourStroke outboard is 33% quieter at cruise with 30% less transmitted vibration at idle than the leading four-stroke competitor.
High Displacement
The high-displacement, quad-cam design of the V8 FourStroke powerhead generates serious torque, especially at mid-range, for quick acceleration and exciting speeds.
Light & Compact
The V8 300hp FourStroke outboard is the lightest in the 300hp class by more than 20 pounds. Both V8 models mount on 26-inch centers for easy repowers or new installation on a wide range of boats.
FourStroke Advantage
Comfort
With a balanced powerhead and sophisticated, vibration-dampening cowl design, Mercury FourStroke outboards deliver an exceptionally smooth and quiet ride at any speed.
Durability
Premium corrosion-preventive technologies and durable components ensure FourStroke outboards can stand up to the most demanding marine environments.
Compact Design
Ideal for new engine setups or repowers, the slender width of a Mercury FourStroke outboard fits most transoms, including those with narrow engine wells and tight motor spacing.
Efficiency
Explore farther and stay out longer thanks to impressive power-to-weight ratios, intelligent fuel systems and optimized fuel injection (on most models) that maximize performance from every drop of fuel.
You may also be interested in:
DISCLAIMER: ALTHOUGH THE INTENTION IS TO MAINTAIN CURRENT PRICES, PROMOTIONS, SPECIFICATIONS AND ALL INFORMATION FOUND WITHIN THIS WEBSITE, AS ACCURATELY AS POSSIBLE; ALL OF THIS INFORMATION IS SUBJECT TO CHANGE WITHOUT NOTICE. WE WILL NOT BE HELD RESPONSIBLE FOR THE ACCURACY OF INFORMATION CONTAINED IN THIS OR ANY OTHER WEBSITE. PAYMENTS NOTED ARE APPROXIMATE. PAYMENTS NOTED CAN BE INFLUENCED BY INTEREST RATE, CREDIT SCORE, FINANCING TERM, DOWNPAYMENT, PAYMENT SCHEDULE, AMONGST OTHER VARIABLES. VIDEOS ARE REPRESENTATIVE OF MODELS SHOWN HOWEVER MAY NOT BE OF THE EXACT UNIT SHOWN, SO OPTIONS AND FEATURES MAY VARY. PLEASE VERIFY ANY/ALL INFORMATION IN QUESTION WITH AN APPROPRIATE DEALERSHIP REPRESENTATIVE; INCLUDING MINIMUM/MAXIMUM SPECIFICATIONS AS THEY MAY BE AFFECTED BY ADDITIONAL FACTORS INCLUDING LEGAL LIMITS. NO INFORMATION PROVIDED ON THIS SITE CONSTITUTES AN OFFER OR GUARANTEE IN ANY WAY. NOT ALL PURCHASERS WILL QUALIFY FOR OFFERS, INCENTIVES, DISCOUNTS OR FINANCING. CHECK WITH YOUR REGION'S LEGISLATION IN REGARDS TO PRICING AND WHAT IT MAY, OR MAY NOT INCLUDE – INCLUDING BUT NOT LIMITED TO, TAXES DEALER-INSTALLED ACCESSORIES, OPTIONAL EQUIPMENT, TRANSPORTATION CHARGES, INSURANCE, LICENSING FEES OR OTHER FEES. ALL PRICING IS NOTED IN THE LEGAL TENDER OF THE LOCATION OF THIS DEALER, UNLESS OTHERWISE STATED. PLEASE CONTACT THE DEALER FOR ACCURATE DETAILS ON THIS UNIT AND ITS ASSOCIATED FINAL COSTS.