New V-8 Four-Stroke Outboards: Powerful. Fast. Efficient.

We are excited to debut our all-new 250R and 300R outboards.

The 300R with Heavy Duty midsection and Sport Master gearcase.

Designed, developed and manufactured in-house, the naturally aspirated, 4.6 Liter V-8 four-stroke engines share Mercury Racing’s venerable Quad Cam Four Valve (QC4) sterndrive DNA – complete with aluminum four-valve cylinder heads and dual overhead camshaft (DOHC) valve trains.

The four valve heads and DOHC valve train is integrated with Mercury’s proprietary V-8 cylinder block, packed with high performance hardware. The new platform replaces the two-stroke V-6 250XS and 300XS models.

 

No Replacement for Displacement

The stout V-8 powerhead provides an astounding 53% increased displacement compared with the 250XS and 44% more displacement than the 300XS resulting in 40% higher overall bottom- end torque compared to the legacy two-strokes.

Advanced Range Optimization automatically adjusts fuel delivery for up to 10% improvement in cruise-speed fuel efficiency.

Transient spark calibration boosts torque by 7% for unmatched acceleration. Advanced Range Optimization automatically adjusts fuel delivery for up to 10% improvement in cruise-speed fuel efficiency. All of this on 87-octane (90 RON) pump fuel while maintaining a comparable weight to the legacy two-stroke 250 XS and 300 XS models. Best of all, the new 250R and 300R models are backed by a three-year factory warranty.

Most Versatile Performance Outboards on the Market

Racing exclusive intake cam profile and short intake manifold runners for maximized power throughout the rpm band.

The 300R is highest performing engine in its class. The powerhead features custom Racing intake cam shafts and an exclusive short runner intake manifold. An integrated oil cooler keeps oil temps down throughout the 300R’s higher 5800-6400 rpm operating range.

Factory rear tie-bar models are available for enhanced stability on high speed multiple engine catamaran and offshore center console applications.

The 300R is available with either mechanical or digital control systems.  In addition, two midsection (Tri-Ram and heavy-duty HD) and three gearcase (Sport Master, Torque Master, and 5.44” HD) options ensure compatibility with any boat that needs to go fast.

Factory rear tie-bar models are available for enhanced stability on high speed multiple engine catamaran and offshore center console applications. An optional side steering bracket kit is also available.

250R

The 250R replaces the legacy 250XS OptiMax.

The 250R is available with a mechanical control system. It features the Tri-Ram midsection and the surface piercing Sport Master gearcase. Designed for boats capable of speeds in excess of 85 mph, the Sport Master features low water pick-ups and a crescent leading-edge for maximized efficiency.

Custom Colors

The 300R with optional Graphite Grey accent panel.

An optional Graphite Grey accent panel is available as a kit. A paint-ready kit is also available to custom match the engine to the boat.

 

 

 

Hand Crafted Propellers

A full arsenal of custom Mercury Racing propellers are available to maximize performance in any application

See your local Mercury Racing dealer to Revolutionize your ride with a new Mercury Racing V-8 FourStroke outboard!

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10 thoughts on “New V-8 Four-Stroke Outboards: Powerful. Fast. Efficient.”

  1. How will this compare with my current 2017 Verado 250 Pro for speed and mpg if put on another 21’6” Phx bass boat? Could this motor be used for trolling on occasion?

    1. Hello Sam. As of now – we don’t have performance data comparing the Verado 250 vs. the 250R. The Verado features the Advanced Midsection compared with the 250Rs conventional tri-ram midsection. The 250R is only available with the surface piercing Sport Master gearcase.

  2. I just bought a racing 250xs last month , I’m loving it but I hope I didn’t make a mistake not waiting a bit longer…..

    1. Hey Brent. Retail pricing varies as we have a number of Skus available for both mechanical and digital throttle and shift models. MSRP ranges from $27,060 for a 20-inch Mechanical Shift Torque Master model to $32,335 for the 30-inch DTS 5.44″ HD gearcase model. The weights are listed on the specs within the 300R product page.

      http://www.mercuryracing.com/outboards/engines/300r/

  3. will the 300r run any better with higher octane like 91….
    running on a bass boat what do you recommend? TM lower and what mid section and what control system….currently running a phoenix 721 with 300xs and TM lower boat and motor 2015……fixing to order new 721 and 300r and need some help please….current set up 83 all day long so do I stick with TM or try SM?

    1. Hello Wallace;
      No need for 91-octane with the 300R. It is designed to run on 87 octane. 91 octane won’t help it a bit in terms of performance. If your 300XS with the Torque Master is running 83 today – then you may want to consider running the Sport Master which s designed for speeds in excess of 85 MPH. It depends on the hull. Does it have natural bow lift – or do you need to use trim to get the bow up for top speed? If it lifts naturally – then the surfacing Sport Master may be the ticket. The 300R packs quite a bit more power than the 300XS. You should check with Phoenix to see if they have ever installed Sport Master engines on any of their hulls. I know Bullet bass boats have been rigged both ways – Torque Master ProXS and Sport Master XS engines. You will wan to go with the Tri-Ram mid-section.

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