MerCruiser 350 MPI ALPHA BRAVO 300 HP (8M0136293)

Description

MerCruiser 350 MPI ALPHA BRAVO 300 HP (8M0136293) – High-Performance Inboard Engine

The MerCruiser 350 MPI ALPHA/BRAVO 300 HP (8M0136293) is a fully dressed, high-performance marine engine designed to deliver exceptional power, efficiency, and durability. Featuring Multi-Port Fuel Injection (MPI) with Cool Fuel II, this engine provides 300 horsepower at 5000 RPM, making it an ideal upgrade for boaters looking to enhance performance, fuel economy, and reliability.

This MerCruiser inboard motor is built with 100% new Quicksilver components, including a cast iron engine block, SmartCraft-ready ECM555 system, Engine Guardian protection, and Dry Joint Exhaust. It is an excellent repower solution for boats previously powered by 5.0 EFI, 5.0L MPI, 5.7L EFI, and 350 MPI sterndrive Alpha models.

Key Features & Benefits

Superior Power & Acceleration

• 300 HP @ 5000 RPM – Provides smooth acceleration and high torque output.
• 350 Cubic Inch Displacement – An ideal upgrade over older inboard boat motors for better performance and fuel efficiency.
• Multi-Port Fuel Injection (MPI) with Cool Fuel II – Optimizes fuel delivery for better power output, cleaner emissions, and increased fuel economy.

Durable & Marine-Optimized Construction

• 100% New Quicksilver Cast Iron Engine Block – Engineered for long-lasting performance in harsh marine environments.
• Raw Water Cooling System with Warm Exhaust Manifolds – Ensures efficient temperature control for extended engine lifespan.
• Dry Joint Exhaust – Designed to reduce corrosion and improve engine durability, making it perfect for saltwater and freshwater use.

Fuel Efficiency & Smart Monitoring

• ECM555 Engine Management System with Engine Guardian – Provides real-time monitoring and protection to prevent potential engine damage.
• SmartCraft Ready – Fully compatible with SmartCraft digital gauges and diagnostics, allowing for precise performance tracking and fuel efficiency monitoring.
• Runs on 87 Octane Fuel – Delivers cost-effective and efficient operation.

Seamless Installation & Compatibility

• 1.5:1 Stamped Rocker Arms & Roller Camshaft – Ensures smooth operation and improved efficiency.
• Mechanical Throttle & Shift with 10-Pin Harness – Designed for easy installation and compatibility with existing controls.
• Compatible with Alpha One (Gen I) Drive – If used with Alpha One (Gen I) drive, this engine requires Seawater Pump Kit 46-8M0139983 and Serpentine Belt 57-865615Q03 (sold separately) for proper cooling.

Technical Specifications

Specification	Details
Power Output	300 HP @ 5000 RPM
Displacement	350 cu in
Engine Type	V8 Marine Engine
Fuel System	Multi-Port Fuel Injection (MPI) with Cool Fuel II
Compression Ratio	Standard
Crankshaft Material	High-Strength Steel
Camshaft Type	Roller Camshaft
Cylinder Heads	Quicksilver Cast Iron with Black-X Valve Tech
Ignition System	ECM555 with SmartCraft Compatibility
Cooling System	Raw Water Cooling with Warm Exhaust Manifolds
Exhaust System	Dry Joint Exhaust
Starter & Harness	10-Pin Harness Included
Recommended Fuel	87 Octane

Why Choose the MerCruiser 350 MPI ALPHA BRAVO 300 HP?

• Perfect for Repowering – Directly replaces 5.0 EFI, 5.0L MPI, 5.7L EFI, and 350 MPI sterndrive Alpha models.
• Smooth & Efficient Acceleration – Optimized for strong torque and fuel efficiency.
• SmartCraft Digital Integration – Provides real-time engine monitoring and diagnostics.
• Durable & Corrosion-Resistant – Designed with marine-grade materials for longevity in all water conditions.
• Seamless Compatibility – Works with both Alpha and Bravo sterndrives, with optional components available for Alpha One (Gen I) installation.

Warranty & Support

The MerCruiser 350 MPI ALPHA/BRAVO 300 HP (8M0136293) comes with a 3-Year Limited Factory Warranty, ensuring protection against manufacturing defects and providing long-term peace of mind.

Frequently Asked Questions (FAQs)

What boats are compatible with this engine?
This engine is an ideal repower option for boats using 5.0 EFI, 5.0L MPI, 5.7L EFI, and 350 MPI sterndrive Alpha models, making it a versatile and powerful upgrade.

Is this engine suitable for saltwater use?
Yes, it is built with marine-grade corrosion-resistant components, ensuring reliable operation in both freshwater and saltwater environments.

What type of fuel does this engine require?
This engine is optimized to run on 87 Octane fuel, offering cost-effective and efficient operation.

Does the price include installation?
No, the price is for the engine only. However, Seawave Marine provides installation guidance and expert recommendations for professional marine mechanics.

Can I install this engine myself?
While some experienced boat owners may choose to install it themselves, professional installation is recommended to ensure proper alignment, cooling, and performance.

Why is my old engine required for return?
Since this is a completely new engine and not a major repower assembly, the old engine being replaced must be returned per EPA Rule 1068.240, ensuring compliance with environmental regulations.

What additional parts are needed if using this engine with an Alpha One (Gen I) drive?
If installing this engine with an Alpha One (Gen I) drive, you will need:

• Seawater Pump Kit (46-8M0139983)
• Serpentine Belt (57-865615Q03)
  These components are sold separately and are required for proper cooling system function.

Order Your MerCruiser 350 MPI ALPHA BRAVO 300 HP Today

Upgrade your boat with the most advanced, fuel-efficient, and reliable inboard marine engine available. The MerCruiser 350 MPI ALPHA/BRAVO 300 HP delivers exceptional performance, fuel efficiency, and durability, making it the perfect choice for boaters who demand the best.