Mercury Outboards are renowned for their reliability and performance on the water. As a leading brand in marine propulsion, Mercury offers a wide range of outboard motors designed for various boating needs, from fishing and recreational activities to commercial use. Their engines are known for innovative technology, fuel efficiency, and durability, making them a top choice for boaters worldwide. Whether you need a lightweight portable engine or a powerful V6, Mercury Outboards provide exceptional power and smooth operation, ensuring a superior boating experience. Click on the engine you are interested in and get a quote today to discover unmatched quality and performance.
2018 Mercury Racing 300R
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Description
2026 Mercury Racing 300R
Let them try and catch you
Take the lead and never look back with the Mercury Racing 300R outboard. Featuring a rock-solid 15-inch HD Conventional MidSection (HD CMS), this adrenaline-pumping V8 powerhouse brings modern R-Series four-stroke technology to high-performance sport, flat sand bass boats. Whether you’re replacing a high-output two-stroke or building your new dream machine, experience the ultimate fusion of breathtaking speed and control.
Trimmed Down. Amped Up.
With a proven offshore pedigree, the HD CMS is built to exceed the most extreme boating demands. Heavy-duty forged transom brackets and a robust single-ram trim system with remote pump keep you running at the highest speeds through the most challenging conditions.
Refined for Bold New Applications
Smaller footprint, same racing DNA—now available for boats that demand agility without sacrificing performance
Compact. Capable. Uncompromising.
The 300R with the 15-inch HD CMS delivers Mercury Racing performance in a smaller, more versatile package. Built for boaters who demand precision handling, aggressive acceleration, and proven reliability. Ready to rig your next high-performance machine?
Info
Industry
Marine
Make
Mercury Racing
Model
300R
Trim
Base
Year
2018
MSRP
N/A
Category
Outboard
Subcategory
General
Specs
Ignition/Starter
Ignition: SmartCraft PCM 112 Digital Inductive | Starter: Electric Start with SmartStart Protection
Throttle
5800-6400 RPM
Length
Shaft: 15 in
Engine type
V8 (32-valve, DOHC), Naturally Aspirated Four Stroke
Warranty
3-Year Limited (Up to 5 Years Mercury Product Protection Available)
Horsepower
Rated: 300 HP
Bore x Stroke
3.62 x 3.39 in
Engine
Cylinders: V8 [64 degree] with Dual Overhead Cam [DOHC] and 32-valves
Intake/Induction
Induction: Custom Racing Short-Runner Intake Manifold
Fuel System
Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization
Steering
Hydraulic or Power Compatible with side-steering and aft tie bars
Weight (Dry)
545 lbs
Engine Disp to Wgt
4.6 l
Fuel Type
Unleaded 87 Octane Minimum (R+M/2) or 91 RON
Horsepower
300 hp
Engine (Displacement)
4.6 L
Length
SHAFT LENGTH 20, 25, or 30
Warranty
3-Year²
Bore x Stroke
3.6 x 3.4 IN/92 x 86 MM
Fuel Type
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/Starter
Digital Inductive
Battery
115 (AMS)
Oil Type
NMMA Certified FCW SAE 10W-30
Throttle
DTS (AMS), DTS or Mechanical (CMS)
Weight (Dry)
512 LBS
Steering
Electro-Hydraulic Power Steering
Engine type
V-8 NA 4S
Lubrication System
Integrated Wet Sump
Oil Capacity
6.6L
Horsepower
300
Engine (Displacement)
4.6 L
Length
SHAFT LENGTH 20, 25, or 30
Warranty
3-Year²
Bore x Stroke
3.6 x 3.4 IN/92 x 86 MM
Fuel System
Electronic Fuel Injection (EFI) Computer Controlled With Advanced Range Optimization
Ignition/Starter
Digital Inductive / Electric Start With SmartStart Protection
Weight (Dry)
512 LBS
Steering
Electro-Hydraulic Power Steering
Engine type
V-8 NA 4S
Lubrication System
Integrated Wet Sump
Exhaust
Selectable
Oil Capacity
6.6L
