Mercury Racing to Provide Motors for Race Series in 2019

The Powerboat P1 SuperStock outboard racing series is repowering for the 2019 season with Mercury Racing’s new 4.6L V-8 four-stroke 300R outboard. P1 SuperStock, presented by Mercury Racing, is a one-design, single-engine race series. The 300R will replace Racing’s 300XS as the exclusive power for the series for both domestic and international venues.
Designed, developed and manufactured in-house, the naturally aspirated four-stroke 300R shares Mercury Racing’s venerable Quad Cam Four Valve (QC4) sterndrive DNA. The V-8 powerhead provides a 44% increase in displacement compared to the two-stroke 300XS. That, combined with four valves per cylinder and the DOHC valve train, lets the four-stroke generate better torque and acceleration. It runs on 87-octane (90 RON) pump fuel and has similar weight specifications to its two-stroke predecessor. 
Behind The Power

Two midsections and three gearcase options are available for the 300R. P1 SuperStock will feature Mercury Racing 300Rs with the Heavy-Duty midsection with a factory installed rear tie-bar mounting plate and side steering bracket assembly. The midsection features solid mounts and forged transom brackets with single ram power trim and a remote trim pump.
The surface piercing Sport Master, designed for boats capable of speeds in excess of 85 mph, features low-water pick-ups and a crescent leading-edge. All boats are equipped with Mercury Racing Rev 4 XP propellers. 
The 300R is backed by a three-year factory warranty with up to three years of Mercury Product Protection for a possible six years of warranty when used in recreational boating applications. 
The 2018 P1 SuperStock USA Championship season finale is June 30 – July 1 at the 34th Annual Sarasota Grand Prix Festival in Sarasota, Fla.