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The values presented on this site are for estimation purposes only. Your actual payment may vary based on several factors such as down payment, credit history, final price, available promotional programs and incentives. Applicable tag, title, destination charges, taxes and other fees and incentives are not included in this estimate.

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2025 Mercury Marine® FourStroke 300hp

Includes all available rebates, discounts, and allowances.>
Available Now
  • New
  • In Stock
  • Outboard
  • Four Stroke
  • 120
  • Powered
  • 300 HP

2025 Mercury Marine® FourStroke 300hp

Mercury 4.6L V8 250 and 300hp FourStroke outboards deliver legendary performance and an all-around elevated boating experience. Reliability. Comfort. Power. Handling. Easy ownership. Flexibility. For any body of water and across a wide variety of boats, every facet of a Mercury FourStroke outboard is engineered to ensure you make the most of your time on the water.

Features may include:

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.
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.
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.
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.
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.
  • New
  • 120
  • 2025
  • Mercury Marine®
  • FourStroke 300hp
  • Outboard
  • Four Stroke
  • 3B548595
  • 3B548595
  • Single Outboard
  • 3B548595
  • 21885
  • 300
  • Powered
  • 606 East Miller St., Iowa, LA 70647
  • 1
  • 300XL
  • 300 HP
  • 3B548595
  • Gas
  • 300 HP (221 kW)
  • V8
  • 4.6L
  • With Idle Charge: 85 amp (1071 Watt)
  • Lightest model available: 527 lbs (239 kg)
  • Smartcraft Compatible: Yes | Recommended Fuel: Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
  • Black / Cold Fusion White / Warm Fusion White / Pearl Fusion White

Get an Estimate for Your Payment

  • Estimated Payment
  • Calculation is estimate only.
  • Includes all available rebates, discounts, and allowances.

Advertised pricing excludes applicable taxes title and licensing, dealer set up, destination, reconditioning and are subject to change without notice. Pricing may exclude any added parts, accessories or installation unless otherwise noted. Sale prices include all applicable offers. Not all options listed available on pre-owned models. Contact dealer for details.