Mercury 350CXXL 350HP Outboard – 30in Shaft, Counter Rotation, DTS

Deploy the V10-powered, 30-inch Mercury 350CXXL to resolve severe propeller ventilation on custom high-transom offshore hulls. The naturally aspirated 5.7-liter block forces immediate acceleration, pushing heavily loaded multi-engine center consoles over aggressive ocean swells. Taping your transom verifies this 30 inch shaft mercury outboard motor places the water intakes deep enough for safe operation.

Prevent dead electronics while slow-trolling offshore by leveraging the massive 150-amp alternator as a dedicated onboard power plant. The system replenishes drained battery banks continuously at low RPM. Mercury casts the 320 kg assembly with low-copper marine alloys under the factory finish. This structural barrier stops galvanic decay completely when repowering large bay boats for coastal use.

Key Features of Mercury 350CXXL

- Naturally Aspirated V10: Breathes massive volumes of clean air, generating 350 horsepower effortlessly without relying on forced induction components.
- 30-Inch XXL Shaft: Reaches below heavily modified offshore transoms, keeping the propeller fully engaged in clean undisturbed water.
- Advanced Power Trim: Adjusts the running angle dynamically from the helm, optimizing hull attitude during rough ocean crossings.
- DTS Integration: Replaces binding mechanical cables with precise electronic signals, allowing effortless multi-engine synchronization from a single binnacle.
- Massive 150-Amp Alternator: Generates tremendous electrical output, keeping deep cycle house batteries topped off during long tournament fishing days.
- Counter-Rotating Gears: Offsets the lateral thrust of standard engines, eliminating steering pull and keeping the vessel tracking dead straight.
- Submerged Exhaust Routing: Channels hot gases out through the propeller hub, keeping the aft deck completely free of exhaust smoke.
- Integrated Power Steering: Provides electro-hydraulic mechanical assist, delivering sports-car-like handling and zero steering fatigue during long offshore runs.
- Heavy-Duty 2.08:1 Gearcase: Deflects submerged debris physically, protecting the hardened steel internal gears from catastrophic offshore impacts.
- EPA Compliant Technology: Burns fuel with strict efficiency, ensuring peak performance while meeting modern clean-air environmental standards.

Why Choose Mercury 350CXXL

You select this counter-rotating 30-inch motor specifically to complete a twin or triple engine array on massive offshore hulls. Substituting a 25-inch model will cause catastrophic water pump starvation. Upgrading your mercury digital throttle network is required for multi-engine communication.

- Confirm a 30-inch vertical drop from the mounting bracket to the keel line.
- Network the DTS module securely to your master helm command center.
- Avoid heavy smoke and oil slicks using advanced V10 four-stroke internal lubrication.

Ideal Application and Vessel Fitment

Engineered for massive triple-engine center consoles and custom offshore catamarans, this 30-inch shaft configuration reaches deep below highly elevated transoms to find clean, undisturbed water. Running this 30 inch shaft mercury outboard motor on the port side guarantees absolute tracking stability through aggressive ocean chop. It is the definitive choice for long-range tournament anglers and offshore patrol vessels demanding uninterrupted propeller bite when cresting large swells at high cruising speeds.

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.