Mercury 400HP 400CXXL Verado V10 Counter Rotation Outboard – 30″ Shaft
Delivering 400 horsepower, the Mercury 400CXXL Verado V10 provides counter-rotation operation with a 30-inch shaft. Its V10 output supports large offshore boats, while the shaft dimension helps maintain proper propeller depth and counter-rotation balances twin-engine thrust.
Description
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Mercury 400HP 400CXXL Verado V10 Counter Rotation Outboard Specs
| Brand | Mercury Marine |
| Full Model Code / Part Number | 400CXXL Verado V10 (Counter Rotation / 30" Shaft) |
| Country of Origin | USA |
| Engine Type & Configuration | 4-Stroke 64° V10 (DOHC with 4-Valves per Cylinder) |
| Horsepower Output (HP / kW) | 400 HP (298 kW) |
| Displacement (cc / cu in) | 5700 cc (349 cu in) |
| Bore x Stroke (mm / in) | 90.0 x 89.0 mm (3.54 x 3.50 in) |
| Maximum RPM Range (Full Throttle Operating Range) | 5800 - 6400 RPM |
| Fuel Induction System | Electronic Fuel Injection (EFI) Computer Controlled with Sequential Multi-Port |
| Ignition System | SmartCraft ECM 0d Digital Inductive |
| Starting System | Electric Start with SmartStart Push Button |
| Steering System | Electro-Hydraulic Power Steering (Integrated) |
| Trim & Tilt System | Smart Craft Power Trim and Tilt |
| Gear Ratio & Shift Mechanism | 2.08:1 (Counter Rotation TorqueMaster / Forward - Neutral - Reverse) |
| Exhaust System | Through Propeller |
| Recommended Transom Shaft Length | XXL: 30 inches |
| Alternator / Charging Output (Amps / Watts) | 150 Amp (Idle Charge Battery Management System) / 1800 Watts |
| Recommended Fuel Grade & Oil Type | Regular Unleaded (Min. 87 Octane) / Mercury 4-Stroke Outboard Oil NMMA FC-W 25W-40 |
| Dry Weight (kg / lbs) | 316 kg / 695 lbs |
| Standard Warranty | 3 Years Limited Recreational Warranty |
Common Question of Mercury 400CXXL Verado
Is the 400CXXL counter rotating?
Yes. The Mercury 400CXXL Verado V10 is specified as a counter-rotation outboard with a 30-inch shaft. Its counter rotating lower unit is intended for compatible paired-engine applications. Confirm engine pairing, propeller specification, controls, steering equipment, battery, wiring, and boat compatibility before installation of this high performance outboard motor.
What transom fits its shaft?
A 30-inch transom is the intended match for this CXXL Verado configuration. Measure the hull before purchase because incorrect shaft length can affect cooling-water pickup, gearcase clearance, propeller immersion, steering response, and paired-engine balance. Accurate measurement supports this ready to bolt marine outboard installation.
Does it use fuel injection?
Yes. The Mercury 400CXXL Verado V10 uses an electronic fuel injection system for controlled fuel delivery across operating conditions. Verify cooling-water flow, mounting height, propeller requirements, electronic controls, gauges, battery capacity, steering equipment, and complete counter-rotation rigging before installation.
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