MerCruiser 350 MPI ALPHA BRAVO 300 HP (8M0136293)

Description

Overview

The MerCruiser 350 MPI ALPHA BRAVO 300 HP has earned a reputation as one of the most dependable and versatile marine engines available. Built on a proven V8 architecture, this engine combines strong horsepower output with smooth operation and long-term durability.

Producing 300 horsepower at 5000 RPM, the engine delivers excellent acceleration, reliable cruising performance, and strong mid-range power. Its design allows it to perform efficiently across a wide variety of recreational boating applications while maintaining dependable operation in demanding marine environments.

The integration of modern fuel injection technology and advanced electronic controls further enhances overall efficiency and reliability.

Applications and Vessel Compatibility

The MerCruiser 350 MPI 300 HP is suitable for a broad range of marine applications.

Common vessel types include:

• Sport boats
• Bowriders
• Performance boats
• Express cruisers
• Family cruisers
• Deck boats
• Wake boats
• Ski boats
• Offshore recreational boats
• Marine repower projects

Its compatibility with both Alpha and Bravo sterndrive systems provides excellent installation flexibility across various vessel designs.

The engine’s balance of power and reliability makes it popular among both recreational boaters and marine professionals.

Proven 300 Horsepower V8 Performance

At the core of the MerCruiser 350 MPI is a powerful 350 cubic inch V8 marine engine designed to provide responsive and dependable marine performance.

Performance benefits include:

• Strong acceleration
• Excellent cruising capability
• Smooth power delivery
• Reliable high-RPM operation
• Consistent throttle response
• Strong load-carrying performance

The V8 platform delivers ample torque throughout the operating range, helping vessels perform confidently under varying load and sea conditions.

Its performance characteristics make it suitable for watersports, cruising, and general recreational boating.

Multi-Port Fuel Injection with Cool Fuel II

The Multi-Port Fuel Injection (MPI) system paired with Cool Fuel II technology provides precise fuel delivery and enhanced efficiency.

Benefits include:

• Improved fuel economy
• Faster engine starts
• Smooth idle operation
• Enhanced throttle response
• Consistent fuel delivery
• Improved combustion efficiency

The Cool Fuel II system helps maintain fuel temperature stability, contributing to more reliable engine performance and improved operating efficiency.

Together, these technologies optimize power production while supporting dependable operation.

Advanced Electronic Engine Management

The MerCruiser 350 MPI utilizes the advanced ECM555 engine management system.

Key functions include:

• Fuel delivery management
• Ignition timing control
• Engine monitoring
• Diagnostic support
• Performance optimization
• Reliability enhancement

The ECM555 continuously monitors engine operating conditions and adjusts performance parameters to maximize efficiency and dependability.

This advanced control system helps simplify maintenance while improving overall engine operation.

SmartCraft Compatibility

The engine is fully compatible with Mercury Marine’s SmartCraft digital monitoring system.

Advantages include:

• Real-time engine information
• Enhanced diagnostics
• Performance monitoring
• Fuel management data
• Maintenance tracking
• Improved operator awareness

SmartCraft technology provides boat owners with valuable operational information that supports efficient and informed vessel operation.

This capability is particularly valuable for modern recreational boating applications.

Durable Marine Engine Construction

The MerCruiser 350 MPI ALPHA BRAVO is built using durable marine-grade components designed for long-term reliability.

Key construction features include:

• High-strength steel crankshaft
• Roller camshaft
• Quicksilver cast-iron cylinder heads
• Black-X valve technology
• Marine-specific ignition components
• Heavy-duty internal construction

These components help ensure durability, smooth operation, and dependable performance over the engine’s service life.

The rugged construction makes the engine suitable for both freshwater and saltwater environments when properly maintained.

Dry Joint Exhaust System

The engine incorporates a Dry Joint Exhaust System, designed to improve reliability and reduce maintenance concerns.

Benefits include:

• Reduced corrosion risk
• Improved durability
• Enhanced exhaust sealing
• Long-term reliability
• Lower maintenance requirements
• Improved marine suitability

This design helps protect critical exhaust components while contributing to overall engine longevity.

The system is widely recognized as a valuable feature in modern MerCruiser propulsion systems.

Raw Water Cooling System

The MerCruiser 350 MPI utilizes a raw water cooling system combined with warm exhaust manifolds.

Advantages include:

• Effective temperature management
• Proven marine cooling design
• Reliable operation
• Simplified cooling architecture
• Efficient heat dissipation
• Consistent engine performance

The cooling system helps maintain stable operating temperatures while supporting long-term reliability.

This proven configuration remains widely used across recreational marine applications.

Technical Specifications

The MerCruiser 350 MPI ALPHA BRAVO 300 HP (8M0136293) produces 300 horsepower at 5000 RPM and is powered by a 350 cubic inch V8 marine engine. Fuel delivery is managed through Multi-Port Fuel Injection (MPI) combined with the advanced Cool Fuel II system.

The engine features a high-strength steel crankshaft, roller camshaft, Quicksilver cast-iron cylinder heads with Black-X valve technology, and the ECM555 engine management system with full SmartCraft compatibility.

Cooling is provided through a raw water cooling system with warm exhaust manifolds, while exhaust management utilizes a Dry Joint Exhaust System. The package includes a 10-pin wiring harness and is designed to operate on 87-octane gasoline.

The engine is compatible with both Alpha and Bravo sterndrive systems, making it suitable for a wide variety of recreational marine applications.

Product Support and Parts Availability

Owners of the MerCruiser 350 MPI ALPHA BRAVO 300 HP benefit from Mercury Marine’s extensive support network, including technical documentation, service resources, replacement parts availability, and authorized maintenance support.

Customers can also explore related MerCruiser engines, sterndrive systems, SmartCraft electronics, marine controls, and propulsion accessories to support complete marine propulsion installations.

Professional support helps maximize engine performance and long-term reliability.

Frequently Asked Questions

How much power does the MerCruiser 350 MPI produce?

The engine delivers 300 horsepower at 5000 RPM.

What type of fuel injection system does the engine use?

The engine utilizes Multi-Port Fuel Injection (MPI) combined with Cool Fuel II technology.

Is the engine compatible with SmartCraft?

Yes. The engine includes full SmartCraft compatibility for advanced monitoring and diagnostics.

What sterndrive systems can be used with this engine?

The engine is compatible with both Alpha and Bravo sterndrive systems.

What fuel does the engine require?

The engine is designed to operate on 87-octane gasoline.

Does the engine use a roller camshaft?

Yes. The engine features a durable roller camshaft for improved performance and reliability.

Why choose the MerCruiser 350 MPI ALPHA BRAVO 300 HP?

Its combination of 300 horsepower, MPI fuel injection, SmartCraft compatibility, V8 performance, and MerCruiser reliability makes it one of the most trusted marine engines available.

Technical Specifications