Mercury 350 HP SeaPro V10 Electro-Hydraulic Steering Trim Tilt Long Shaft Outboard Engine

The Mercury SeaPro 350 L AMS DTS V10 is a 4-stroke outboard marine engine designed for commercial fishing boats, rental tour boats, water taxis, and other high-use marine vessels that require a long shaft. It features a 350 HP / 257 kW, 5700 cc V10 (10-cylinder) engine. The SeaPro series is Mercury's specialized range of outboard motors developed for commercial and heavy-duty use. Enhanced durability, SmartCraft integration, and extended service intervals are optimized to meet the needs of commercial operators.

SeaPro 350 L AMS DTS V10 Series Features and Technology Advantages

SeaPro engines aim for long life in saltwater environments with a reinforced cooling system and increased anode protection compared to standard FourStroke series. The SmartCraft gauge system enables fleet-specific engine monitoring.

• V10 (10-Cylinder) Engine (5700 cc): SeaPro engines aim for long life in saltwater environments with a reinforced cooling system and increased anode protection compared to standard FourStroke series.
• Long Shaft (508 mm (20")): The propeller operates at optimal depth with the correct transom height.
• SeaPro Durability Package: Reinforced cooling, increased anode protection, and long service intervals.
• Electric Start: Instant activation with key or button — comfortable and quick starting.
• Power Trim & Tilt: Adjust trim angle with a button while cruising — optimizes fuel efficiency; tilt motor completely up.
• External Flotation Fuel System: Connection for large capacity external tank — range determined by user needs.

Long Shaft — Suitable for Which Boat Type?

A long shaft (508 mm (20")) is suitable for the vast majority of inflatable boats, aluminum boats, 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?

• Commercial fishing and tour boats: SeaPro's increased durability for intensive daily use.
• Water taxis and rental boats: low maintenance costs and long service intervals.
• Search and rescue and patrol boats: reliable power and SmartCraft engine monitoring.
• Coastal fishing fleet specific: standard comparative performance and durability.

Maintenance and Long Life

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

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

Frequently Asked Questions

Why is the Mercury SeaPro 350 HP recommended for commercial use?

The SeaPro series offers a reinforced cooling system and increased anode protection compared to standard FourStroke engines. SmartCraft integration simplifies fleet management and engine monitoring. Extended service intervals reduce operational costs.

What does the SmartCraft system provide in SeaPro engines?

SmartCraft transmits engine status, fuel consumption, temperature, and hourly operating data to a digital display. In multi-engine configurations, each engine can be monitored separately. The early warning system for faults prevents unexpected breakdowns.

What are the maintenance periods for SeaPro engines?

SeaPro engines are designed for long service intervals. Oil changes should be performed according to manufacturer recommendations. In saltwater use, freshwater flushing after each use and end-of-season anode inspection are mandatory.

Which boat and inflatable boat brands are compatible with the SeaPro 350 L AMS DTS V10?

Mercury outboard motors 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 transom height of 508 mm (20") 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 75–150 HP FourStroke
• Mercury SeaPro Motors
• 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 SeaPro 350 L AMS DTS V10 engine for your boat and the correct shaft selection.