Mercury 400 HP Verado V10 Electro-Hydraulic Steering Trim Tilt Long Shaft Outboard Motor

The Mercury Verado 400 L AMS DTS V10 is a 4-stroke outboard marine engine designed for premium yachts, large luxury boats, and multi-engine professional applications requiring a long shaft, featuring 350 HP / 257 kW and a 5700 cc V10 (10 Cylinder) engine. The Verado series encompasses Mercury's most advanced outboards in the premium segment. It has been specifically developed for high-end yachts and large boats with an AMS (Advanced Mid Section) gearbox and electro-hydraulic steering system.

Verado 400 L AMS DTS V10 Series Features and Technology Advantages

Electro-hydraulic steering eliminates the need for mechanical cables — providing exceptional maneuvering precision and comfort. The AMS gearbox optimizes power delivery, enhancing fuel efficiency. Active Trim automatic trim management comes standard.

• V10 (10 Cylinder) Engine (5700 cc): Electro-hydraulic steering eliminates mechanical cables — providing exceptional maneuvering precision and comfort
• Long Shaft (508 mm (20")): Propeller operates at optimal depth with correct transom height
• Electro-Hydraulic Steering: No mechanical cables — precise maneuver control and low steering effort
• Electric Start: Instant engagement with a key or button — comfortable and fast starting
• Electric Trim and Tilt (Power Trim & Tilt): Adjust trim angle with a button while cruising — fuel efficiency optimization; full motor lift with tilt
• Float-type External Fuel System: Large capacity external tank connection — range determined by user needs

Long Shaft — Which Boat Type Is It Suitable For?

A long shaft (508 mm (20")) is suitable for the vast majority of inflatable, aluminum, and fiberglass boat models. For boats with a transom height of 381 mm, a short shaft model should be preferred.

Technical Specifications

Who Is This Engine For?

• Premium yacht and luxury large boat: ultimate comfort with electro-hydraulic steering and AMS gearbox
• Multi-engine configuration: consistent power delivery and DTS synchronization
• Long-distance offshore cruising: Active Trim and automatic fuel management
• Rental luxury yacht and charter: high reliability and low maintenance cost

Maintenance and Longevity

4-stroke Mercury engines operate trouble-free for many years with regular oil changes and end-of-season maintenance protocols. The impeller of the water-cooled system should be checked every 100 hours or every two seasons. In saltwater use, freshwater rinsing is mandatory after each use.

Related maintenance categories: Maintenance Kit | Engine Oil | Impeller | Mercury Spare Parts

Frequently Asked Questions

What is the main difference between the Verado series and standard FourStroke?

Verado offers an AMS (Advanced Mid Section) gearbox and an electro-hydraulic steering system. Its design, which does not require mechanical cables, provides more precise maneuvering and lower maintenance. DTS digital throttle makes it easier to synchronize multiple engines.

How does the electro-hydraulic steering system work?

The electro-hydraulic system transmits steering movement electronically to a hydraulic actuator. With no mechanical cable friction, it provides much lower steering effort and higher precision. In multi-engine applications, the simultaneous turning of the engines is automatically coordinated.

What does the Active Trim system do?

Active Trim automatically optimizes the trim angle using GPS speed and acceleration data. It eliminates the need for manual trim adjustment during speed changes — fuel consumption and cruising comfort are continuously optimized.

Which boat and vessel brands is the Verado 400 L AMS DTS V10 compatible with?

Mercury outboard engines are compatible with many fiberglass, aluminum, and inflatable boat models thanks to their universal transom clamp or transom mounting system. The only criteria are your boat's 508 mm (20") transom height and the maximum engine power approved by the manufacturer. You can get compatibility confirmation from Clever Marin by sharing your boat model.

Related Products and Categories

• Mercury Outboard Motors
• Mercury Marine Products
• Mercury Spare Parts
• Mercury Verado 175–400 HP
• Mercury Verado 350–500 HP
• Outboard Motors
• Boat Engines
• Maintenance Kit
• Impeller
• Anode

Is This the Right Configuration for Your Boat?

Share your boat model, transom height, and intended use — let's confirm together the suitability of the Mercury Verado 400 L AMS DTS V10 engine for your boat and the correct shaft selection.