Mount the counter-rotating, 300-horsepower Mercury 300CL to eliminate starboard steering pull on twin-engine performance hulls. The massive 4.6-liter V8 block delivers brutal acceleration, pushing heavy offshore center consoles over steep morning swells. Verifying your 20-inch transom height guarantees this counter rotating mercury outboard motor pairs safely with your starboard drive.

Eradicate extreme steering fatigue at high speeds by utilizing the integrated electro-hydraulic power steering as a seamless mechanical assist. You pilot massive twin-engine rigs with single-finger precision through rough seas. Mercury coats this 272 kg powerhouse with advanced marine primers. This physical barrier stops galvanic blistering across decades of exposure when repowering high performance bay boats.

Key Features of Mercury 300CL

- Counter-Rotating Gearcase: Cancels the massive lateral thrust of a standard engine, keeping twin-engine performance hulls tracking perfectly straight underway.
- 20-Inch Shaft Length: Fits standard high-performance transoms perfectly, keeping the gearcase profile tight to maximize top-end running speeds.
- Advanced Range Optimization: Leans the fuel mixture automatically at cruise via EFI, maximizing your tournament fishing range significantly.
- Integrated Power Steering: Provides electro-hydraulic mechanical assist, delivering sports-car-like handling and zero steering fatigue during long offshore runs.
- Massive 115-Amp Alternator: Outputs unmatched electrical current continuously, keeping premium gyro-stabilizers and large chartplotter arrays fully powered.
- Digital Throttle and Shift: Translates hand movements into instant electronic commands, eliminating mechanical cable friction during precise marina docking.
- 32-Valve DOHC Powerhead: Breathes massive volumes of clean air, generating 300 horsepower effortlessly without relying on forced induction superchargers.
- Top-Cowl Service Door: Lets operators check engine oil levels rapidly on the water, preventing dangerous low-lubrication running scenarios.
- Heavy-Duty Power Trim: Lifts the bow out of the water cleanly, drastically reducing hull friction during high-speed tournament sprints.
- Acoustically Tuned Exhaust: Traps low-frequency engine noise inside specialized chambers, making the massive V8 block nearly silent at idle.

Why Choose Mercury 300CL

This exact counter-rotating 20-inch drive acts strictly as the port-side companion in a twin-engine array. You cannot run it as a standalone single engine. Proper setup requires exact mercury outboards digital throttle syncing across both motors.

- Measure your twin-engine transom bracket to confirm a strict 20-inch shaft requirement.
- Link the DTS module to your master binnacle to synchronize shift commands perfectly.
- Navigate restricted coastal fisheries legally utilizing advanced four-stroke combustion.

Ideal Application and Vessel Fitment

This 300-horsepower counter-rotating V8 is engineered strictly for twin-engine high-performance bay boats, low-profile center consoles, and tournament sport hulls demanding a 20-inch shaft. Operating on the port side, it actively cancels the massive starboard propeller torque to keep the hull tracking straight at 70 mph. It thrives in high-speed coastal tournament environments where balancing thrust, managing heavy fuel payloads, and achieving maximum top-end velocity require a synchronized, high-horsepower multi-engine approach.

Warranty, Support and Maintenance

Authorized recreational operation receives a 3-Year Limited Warranty alongside a 3-Year Corrosion Warranty. Registered commercial applications fall under a strict 1-Year Limited Warranty with zero corrosion coverage applied to the block. Scheduled maintenance requires replacing gearcase lubricants and changing oil filters at manual-specified intervals. Always save all physical service records. Your engine serial number acts as the only way to source exact genuine replacement parts. Mulmotor provides pre-purchase product guidance and order-related customer support.