Mercury 400HP 400CXXXL Verado V10 Counter Rotation – 35″ Shaft
The 400-horsepower Mercury 400CXXXL Verado V10 combines counter-rotation operation with a 35-inch shaft. This configuration supports high-transom twin-engine boats, while the V10 output provides substantial offshore propulsion and counter-rotation helps balance engine thrust.
Description
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Mercury 400HP 400CXXXL Verado V10 Counter Rotation Specs
| Brand | Mercury Marine |
| Full Model Code / Part Number | 400CXXXL Verado V10 (Counter Rotation / 35" 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 | XXXL: 35 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 400CXXXL
Is the 400CXXXL counter rotating?
Yes. The Mercury 400CXXXL Verado V10 is specified as a counter-rotation outboard with a 35-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.
What transom fits its shaft?
A 35-inch transom is the intended match for this CXXXL configuration. Measure the hull according to Mercury’s instructions before purchase because incorrect shaft length can affect cooling-water pickup, gearcase clearance, propeller immersion, steering response, and paired-engine balance. Accurate measurement supports a ready to bolt marine installation.
Does it use fuel injection?
Yes. The Mercury 400CXXXL 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 rigging before installing this high performance outboard motor.
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