MerCruiser 350 5.7L ALPHA 300HP (8M0079530) – High-Performance V8 Marine Engine for Reliable Repower
The MerCruiser 350 5.7L ALPHA 300HP (8M0079530) is a premium, high-output inboard marine engine engineered for superior acceleration, smooth cruising, and long-lasting durability. Designed as a partially dressed engine assembly, this 300 HP V8 is an ideal repower solution for aging MerCruiser inboard engines and Alpha sterndrive applications, delivering consistent and fuel-efficient marine performance in demanding conditions.
Powerful V8 Performance & Acceleration
With a robust 300 HP at 5000 RPM and a 5.7L (350 CID) displacement, this engine provides exceptional torque, faster throttle response, and reliable high-speed performance. The integrated roller camshaft and stainless steel valves ensure smoother operation, enhanced efficiency, and extended service life under continuous marine load.
Marine-Grade Durability & Engineering
Built with a 4-bolt main iron block and a nodular iron crankshaft, this engine is designed for strength and endurance in harsh marine environments. Hypereutectic pistons with a 9.4:1 compression ratio improve combustion efficiency and wear resistance, while iron cylinder heads with screw-in rocker studs support long-term structural reliability.
Optimized Fuel & Ignition System
The engine features a 750 CFM 4-barrel carburetor for consistent fuel delivery and stable power output. Combined with the advanced Thunderbolt V ignition system with knock control, it ensures precise ignition timing, improved fuel economy, and dependable starting performance in all boating conditions.
Advanced Cooling & Operational Stability
Equipped with a circulating water pump and bronze water crossover, the cooling system is engineered to maintain optimal operating temperatures and extend engine lifespan. The inclusion of a flame arrestor and harmonic balancer further enhances safety, reduces vibration, and supports smoother engine operation.
Versatile Compatibility & Repower Convenience
The MerCruiser 350 5.7L ALPHA 300HP (8M0079530) is a versatile repower option compatible with:
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MerCruiser Alpha sterndrive applications
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V8 inboard marine engine setups
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Multiple sterndrive and inboard configurations (excluding Alpha One Gen I)
This makes it a cost-effective and high-performance upgrade for recreational and performance boats seeking reliable marine power.
Technical Specifications
| Specification | Details |
|---|---|
| Power Output | 300 HP @ 5000 RPM |
| Displacement | 5.7L / 350 Cubic Inches |
| Engine Type | V8 Marine Engine |
| Fuel System | 750 CFM 4-Barrel Carburetor |
| Compression Ratio | 9.4:1 |
| Crankshaft Material | Nodular Iron |
| Camshaft Type | Roller Camshaft |
| Cylinder Heads | Iron with Screw-In Rocker Studs |
| Ignition System | Thunderbolt V with Knock Control |
| Fuel Pump | Mechanical |
| Cooling System | Circulating Water Pump with Bronze Water Crossover |
| Starter & Harness | 10-Pin Harness Included |
| Recommended Fuel | 87 Octane |
| Engine Weight | Standard V8 Configuration |
Why Choose the MerCruiser 350 5.7L ALPHA 300HP?
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High-output 300 HP V8 performance for superior acceleration
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Fuel-efficient and reliable marine engineering
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Ideal repower solution for MerCruiser Alpha sterndrive boats
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Marine-grade components designed for corrosion resistance
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Durable construction for long-term performance in freshwater and saltwater environments
Warranty & Support
This engine is backed by a 3-Year Limited Factory Warranty, providing long-term reliability and peace of mind. Professional installation is recommended to ensure proper alignment, cooling integration, and optimal performance.
Order with Confidence
Upgrade your vessel with a powerful, efficient, and dependable V8 marine engine built for performance and longevity. The MerCruiser 350 5.7L ALPHA 300HP (8M0079530) delivers the perfect balance of power, durability, and fuel efficiency for a premium boating experience.
