2025 Mercury Marine Racing Outboard 300R V-8 FourStroke

We are located in Southern California, U.S.A., and per Mercury Marine Policy,
        we can NOT ship New Mercury Marine Racing engines. 

This engine can only be installed in a U.S. registered vessel.
The selling dealer is also responsible for engine installation.

Mercury Racing 300R Outboard Engine (New) Shown with Sport Master 1.60:1 GearHousing & Optional Propeller

(7) Variations of Mechanical Version Available with choice of (3) Gear Housings

Pricing Starts at $28,815.00 to $34,180.00
Prices Include 12-Hours of Rigging Labor Credit.

3-Year Mercury Marine Warranty

Tuned up with Mercury Racing components to deliver blistering speed, the V8 4.6L 300R outboard delivers crisp throttle response, thrilling top-end power and confident control, the perfect match for a wide variety of high-performance boats. The 300R midsection and gearcase options, tie-bar and steering choices allow the creation of a near-custom configuration to provide optimal performance and ease of installation for most applications, including re-power upgrades.

To squeeze more power from less fuel, naturally aspirated Mercury Racing V8 outboards feature Advanced Range Optimization (ARO), a closed loop fuel-control system that utilizes electronic sensors to precisely adjust the fuel mixture for the best-possible efficiency at all speeds.

SPECIFICATIONS: 5800-6400: FULL THROTTLE RPM 300: RATED HP V8: CYLINDERS 4.6 L: DISPLACEMENT

SHAFT LENGTH: 20, 25, or 30

TRIM SYSTEM: Standard or Heavy Duty

MID SECTION: Standard, Heavy Duty or Racing AMS

SKEG: Camber or Straight

WARRANTY: 3-Year

BORE & STROKE: 3.6 x 3.4 IN/92 x 86 MM

INDUCTION SYSTEM: Custom Racing Short-Runner Intake Manifold

FUEL REQUIREMENT: Unleaded Regular 87 Octane Minimum (R+M/2) Or 91 RON 10% Ethanol Maximum

FUEL SYSTEM: Electronic Fuel Injection (EFI) Computer Controlled With Advanced Range Optimization

IGNITION SYSTEM: Digital Inductive

CHARGING

115 (AMS) / 85 (CMS)

IDLE CHARGE

Yes

STARTING

Electric Start With SmartStart Protection

OIL REQUIREMENT

NMMA Certified FCW SAE 10W-30

JPO OPTION

N (CMS), Optional (AMS)

THROTTLE & SHIFT CONTROLS

DTS (AMS), DTS or Mechanical (CMS)

GEARCASE

Torque Master, Sport Master or 5.44 HD

GEAR RATIO

1.85 (AMS), 1.75:1 (CMS) or 1.60:1 (CMS, AMS)

DRY WEIGHT

512 LBS

CARB STAR RATING

3

MINIMUM CENTERLINE MOUNTING DISTANCE (IN)

26

STEERING

Electro-Hydraulic Power Steering

TIE BAR OPTION

Integrated (AMS), Bracket (CMS)

IDLE RPM

600

MOUNTS

Hard Rubber or Solid

ENGINE TYPE

V-8 NA 4S

LUBRICATION SYSTEM

Integrated Wet Sump

GEAR SHIFT

F-N-R

ENGINE MANAGEMENT SYSTEM

SmartCraft PCM 112

ENGINE PROTECTION SYSTEM

SmartCraft Engine Guardian

EXHAUST SYSTEM

Selectable

OIL CAPACITY

6.6L

STEERING ANGLE

'+ / - 30°