A few years back, Honda made a successful entry into the high-horsepower outboard market with the introduction of its BF350 V8. While the company continues to develop even larger outboards, Honda has unveiled an upgraded version of its proven 200/225/250-hp platform dubbed the M300—an officially licensed product enhanced by McLaren Racing.
The McLaren Performance M300 is the result of a collaboration between Honda Marine and McLaren Engineering. McLaren Engineering has a long North American racing heritage dating back to the original McLaren Engines Inc., founded in 1969. A supplier to Honda for the past decade, McLaren has built a reputation for precision engine component manufacturing. Now, that engineering expertise has been applied to Honda Marine’s outboard lineup. The result is the M300, combining McLaren’s performance pedigree with Honda’s reputation for durability, reliability and fuel efficiency.
Proven Platform
The McLaren Performance M300 is based on Honda’s proven BF250 3.6-liter V6 platform. McLaren increases output from 250 to 300 horsepower through a new high-lift camshaft with more aggressive valve timing, a recalibrated Engine Control Unit (ECU), larger fuel injectors and a higher redline of 6,400 rpm versus 6,300 rpm on the BF250. To achieve the additional 50 horsepower, the M300 requires 90-octane gasoline.
Honda’s VTEC technology delivers a balance of power, torque and fuel economy, while multi-port programmed fuel injection provides easy starting, crisp throttle response and efficient operation. The M300 also retains Honda’s reputation for quiet performance. A dual-channel indirect-air induction system improves airflow while directing moisture away from the throttle body.
The M300 features a heavy-duty gearcase designed to withstand the demanding duty cycles of military and law enforcement vessels. Honda’s Engine Alert System continuously monitors critical functions, warning operators of overheating, water in the fuel, low oil pressure, battery issues, over-revving and other potential problems before damage occurs.
Corrosion resistance remains a priority. High-grade aluminum alloys, additional sacrificial anodes, HI-M coated hardware and Honda’s exclusive four-layer corrosion protection system all help extend engine life in saltwater environments. A freshwater flush port makes rinsing the cooling system quick and easy after each trip.
Routine maintenance has also been simplified. The three-latch cowling removes easily for quick access during oil and filter changes. NMEA 2000 compatibility allows the engine to interface with GPS, sonar and multifunction displays, while a 90-amp belt-driven alternator delivers up to 60 charging amps for onboard electronics without sacrificing performance.
Single Or Twins
The M300 is available in 20-, 25- and 30-inch shaft lengths to accommodate both single- and multi-engine installations. Honda’s Intelligent Shift and Throttle (iST) system offers smooth electronic controls, plug-and-play integration with Honda and select third-party systems, plus enhanced slow-speed handling and docking control. Twin-engine applications can also be paired with Dometic’s Optimus 360 joystick steering system for easier maneuvering in tight quarters.
As of this writing, the McLaren Performance M300 V6 is available as an OEM option through participating Honda boat builders. marine.honda.com
Honda M300 Specifications:
Type: four-stroke, SOHC, 60-degree, 24-valve V6
Displacement: 3583cc (219 cubic in.)
Bore & Stroke: 89mm x 96mm
Rated Power: 300 HP @ 6400 RPM
Fuel Delivery: programmed fuel injection
Ignition System: microcomputer programmed
Exhaust- through hub
Trim Range: -4 to +16 degrees
Tilt Range: 72 degrees
Gear Ratio: 2.00:1
Alternator: 90-Amp (1118 watt)
Battery Charging Power: 60 Amps (756 watts)
Shaft Lengths: L (20”); XL (25”); XXL (30”)
Weight: 609-to-632 pounds, depending on shaft length
