Mercury 400CXL 400HP Outboard – 25in Shaft, Counter Rotation, DTS

Description

Mount the counter-rotating, 5.7-liter Mercury 400CXL to eradicate port-side hull listing on massive offshore setups. The 40-valve DOHC V10 block delivers brutal acceleration, pushing heavy twin-engine center consoles over steep morning swells effortlessly. Measuring your exact transom height guarantees this 25 inch shaft mercury outboard motor aligns perfectly with your starboard drive.

Eliminate 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 violent offshore chop. Mercury coats the 316 kg gearcase with advanced marine primers. This physical barrier stops galvanic blistering across decades of exposure when repowering twin engine offshore boats.

Key Features of Mercury 400CXL

• Electronic Fuel Injection: Meters gas perfectly into the cylinders, delivering crisp throttle response and maximizing fuel efficiency across the 5800-6400 RPM range.
• 25-Inch XL Shaft: Keeps the propeller firmly planted in undisturbed green water, preventing thrust loss on tall offshore transoms.
• Counter-Rotating Gearcase: Cancels the massive lateral thrust of a standard engine, keeping twin-engine performance hulls tracking perfectly straight underway.
• Integrated Power Steering: Provides electro-hydraulic mechanical assist, delivering sports-car-like handling and zero steering fatigue during long offshore runs.
• Massive 150-Amp Alternator: Outputs unmatched electrical current continuously, keeping premium gyro-stabilizers and large chartplotter arrays fully powered.
• Multi-Stage Marine Primer: Bonds chemically to the alloy block, reflecting harsh ultraviolet light and preventing cosmetic saltwater blistering over time.
• Acoustically Tuned Exhaust: Traps low-frequency engine noise inside specialized chambers, making the massive 5.7L block nearly silent at idle.
• Top-Cowl Service Door: Lets operators check the 9.5L engine oil level rapidly on the water, preventing dangerous low-lubrication running scenarios.
• Heavy-Duty 2.08:1 Gearcase: Turns massive stainless steel propellers without slipping, translating 400 horsepower into relentless forward vessel thrust.
• Clean Four-Stroke Combustion: Eliminates messy two-stroke oil reservoirs, keeping your bilge completely clean while meeting strict clean water standards.

Why Choose Mercury 400CXL

This exact counter-rotating 25-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 25-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 counter-rotating 400-horsepower V10 is engineered strictly for multi-engine deep-V center consoles, large luxury cruisers, and extreme performance twin-engine offshore vessels. Operating as the port-side drive in a twin engine mercury outboard setup, it actively cancels starboard propeller torque to keep the vessel tracking perfectly straight across steep ocean swells. It excels in blue water tournament fishing where balancing massive thrust, managing heavy passenger payloads, and fighting unpredictable crosscurrents require precise multi-engine power.

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 product-information support before purchase and assistance with order-related questions.