Description
Discover the power of the MerCruiser Quicksilver 350 MPI inboard down angle for superior boating performance and reliability.
MerCruiser Quicksilver 350 MPI – High-Performance Marine Engine
Introduction
The MerCruiser Quicksilver 350 MPI is a high-output, fuel-injected marine engine engineered to deliver exceptional performance, reliability, and efficiency for recreational and commercial vessels. With a rated output of 350 horsepower, this engine combines MerCruiser’s proven V8 architecture with Multi-Point Fuel Injection (MPI) technology, providing smooth power delivery, excellent throttle response, and optimized fuel efficiency.
Designed for sportboats, luxury cruisers, and offshore vessels, the Quicksilver 350 MPI ensures superior acceleration, dependable cruising, and seamless handling, making it ideal for boating enthusiasts who demand both power and refinement.
Product Description
The Quicksilver 350 MPI is a 5.7-litre, 90-degree V8, 4-stroke gasoline engine equipped with MPI technology, which delivers precise fuel metering to each cylinder individually. This results in improved combustion efficiency, reduced emissions, and enhanced throttle response compared to traditional fuel systems.
The engine’s robust construction includes aluminum cylinder heads and high-strength block components, optimized for corrosion resistance and long-term durability in marine environments. Its closed-loop freshwater cooling system with heat exchanger ensures stable operating temperatures while isolating the engine from direct seawater exposure.
The 350 MPI offers high torque at low to mid-range RPMs, providing excellent acceleration, efficient cruising, and strong towing capability. Its design emphasizes smooth operation, low vibration, and quiet running, enhancing onboard comfort. Mercury’s electronic control system provides advanced monitoring and diagnostic capabilities, simplifying maintenance and optimizing performance.
Key Features
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Power Output: 350 HP (261 kW) for high-performance propulsion in recreational and sport vessels.
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Multi-Point Fuel Injection (MPI): Individual cylinder fuel delivery for improved combustion, fuel efficiency, and reduced emissions.
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V8 Architecture: Provides high torque and smooth, consistent power delivery across the RPM range.
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Durable Construction: Aluminum cylinder heads and reinforced engine block for corrosion resistance and longevity.
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Closed-Loop Cooling: Freshwater cooling with heat exchanger protects the engine from seawater corrosion.
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Low Noise & Vibration: Balanced V8 design and resilient mounts ensure smooth, quiet operation.
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Electronic Control: Advanced monitoring and diagnostic system for optimized engine performance and maintenance.
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Global Support: Mercury’s worldwide dealer network provides access to parts, service, and technical assistance.
Technical Specifications
| Category | Specification |
|---|---|
| Engine Model | MerCruiser Quicksilver 350 MPI |
| Engine Type | 5.7-litre V8, 4-stroke gasoline |
| Displacement | 5.7 litres |
| Aspiration | Naturally aspirated |
| Fuel System | Multi-Point Fuel Injection (MPI) |
| Cooling System | Closed-loop freshwater with heat exchanger |
| Rated Power | 350 HP (261 kW) |
| Max Torque | Approx. 570 Nm at 3,200 RPM |
| Rated Speed | 4,600 RPM |
| Transmission | Compatible with MerCruiser marine gearboxes |
| Alternator | 12V / 95A |
| Starting System | 12V electric starter |
| Exhaust | Closed-loop water-cooled exhaust manifold |
| Weight | Approx. 450 kg |
| Rotation | Clockwise (from flywheel end) |
| Noise & Vibration | Low-vibration design with resilient mounts |
| Emission Compliance | Meets EPA and IMO marine emission standards |
| Applications | Sportboats, cruisers, offshore recreational vessels |
Performance and Reliability
The MerCruiser Quicksilver 350 MPI delivers smooth, reliable, and efficient power suitable for a wide range of marine conditions. Its V8 design ensures ample torque for acceleration, towing, and high-speed cruising, while the MPI system optimizes fuel delivery for maximum efficiency.
The closed-loop freshwater cooling system isolates the engine from direct seawater exposure, reducing corrosion and thermal stress, increasing durability, and extending service intervals. Precision engineering and robust materials ensure long-term reliability even in demanding offshore or coastal applications.
Applications
The Quicksilver 350 MPI is ideal for:
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Sportboats requiring rapid acceleration and precise handling.
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Luxury cruisers and yachts needing smooth, efficient propulsion.
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Offshore recreational vessels demanding high performance and fuel efficiency.
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Light commercial boats where low maintenance and reliable operation are essential.
Its combination of power, efficiency, and durability makes it suitable for a variety of recreational and professional boating applications.
Installation and Maintenance
The engine’s compact V8 layout allows for straightforward installation in most inboard or stern-drive configurations. Key maintenance points, including oil and fuel filters, dipsticks, and coolant access, are conveniently placed for easy service.
Routine maintenance includes oil and filter changes approximately every 100–150 hours, with additional inspections as recommended by Mercury. The global Mercury dealer network ensures easy access to parts, technical support, and service expertise.
The MerCruiser Quicksilver 350 MPI engine offers a perfect combination of high performance, efficiency, and reliability. With its V8 architecture, multi-point fuel injection, and marine-adapted design, it delivers smooth acceleration, strong torque, and long-term durability. Ideal for sportboats, cruisers, and offshore vessels, the Quicksilver 350 MPI ensures a superior marine experience with precise control, fuel efficiency, and confidence in all boating conditions.
