Mercury 90 HP SeaPro Electric Start Steering Trim Tilt CT Long Shaft Outboard Engine

The Mercury FourStroke 90 ELPT EFI CT SeaPro is a 4-stroke outboard marine engine designed for commercial fishing boats, rental tour boats, water taxis, and high-usage marine vessels that require a long shaft. It features a 90 HP / 67 kW and 2064 cc 4-cylinder engine. Thanks to its Command Thrust (CT) gearcase system, it has the large gearcase and gearing of a higher-power engine block. The SeaPro series is Mercury's specialized line of outboards for commercial and heavy-duty use. Enhanced durability, Smart Craft integration, and extended service intervals are optimized to meet the needs of commercial operators.

FourStroke 90 ELPT EFI CT SeaPro Series Features and Technology Advantages

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

• 4-Cylinder Engine (2064 cc): SeaPro engines aim for a long lifespan 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 an optimal depth with the correct transom height.
• SeaPro Durability Package: Reinforced cooling, increased anode protection, and long service intervals.
• Command Thrust (CT) Gearcase: The large gearcase and gearing of a higher-power engine block – high torque at low RPM and strong thrust capability.
• Electric Start: Instant activation with a key or button – comfortable and quick starting.
• Power Trim & Tilt: Adjust trim angle with a button while cruising – optimizes fuel efficiency; tilt allows the engine to be fully raised.
• External Floating Fuel System: Connection for a large-capacity external tank – range determined by user needs.

Long Shaft — What Type of Boat Is It Suitable For?

The 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 taxi and rental boats: Low maintenance costs and long service intervals.
• Search and rescue and patrol boats: Reliable power and Smart Craft engine monitoring.
• Coastal fishing fleet-specific: Standard comparative performance and durability.

Maintenance and Long Lifespan

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 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 90 HP recommended for commercial use?

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

What does the Smart Craft system provide in SeaPro engines?

Smart Craft 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 malfunctions 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 FourStroke 90 ELPT EFI CT SeaPro?

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 transom height of 508 mm (20") and the maximum engine power approved by the manufacturer. You can confirm compatibility with Clever Marin by sharing your boat model.

Related Products and Categories

• Mercury Outboard Engines
• Mercury Marine Products
• Mercury Spare Parts
• Mercury 75–150 HP FourStroke
• Mercury SeaPro Engines
• Outboard Engines
• 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 the suitability of the Mercury FourStroke 90 ELPT EFI CT SeaPro engine for your boat and the correct shaft selection together.