MERCRUISER BG74B Gm Base Engine 454/7.4

( Brand: Mercruiser ), ( Manufacturer Part Number: BG74B ), ( Part Type: Engine ), ( Non-domestic Product: No ), ( Stroke: 4-stroke ), ( Warranty: 2 Year ), ( Engine Hp : 330 ), ( Country/region Of Manufacture: United States ), ( Rotation: Left-hand )

Review MERCRUISER Gm 454/7.4 Generation #5 Replacement Base Engine fits 454

Mercruiser BG74B GM 454/7.4 Base Engine - Powerful and Reliable Marine Propulsion

The Mercruiser BG74B GM 454/7.4 Base Engine is a testament to the brand's commitment to delivering high-performance, reliable, and efficient marine propulsion systems. This powerhouse engine is designed to meet the demands of serious boaters who appreciate the blend of power, durability, and quality that Mercruiser is renowned for.

With a displacement of 7.4 liters, the BG74B GM 454 delivers an impressive power output of up to 300 horsepower. This ample power ensures swift acceleration, smooth cruising, and responsive handling, making it an ideal choice for a wide range of watercraft, from mid-sized boats to larger vessels.

The engine is equipped with a sophisticated fuel injection system, which not only ensures optimal combustion for maximum power but also enhances fuel efficiency, reducing operating costs and minimizing environmental impact. The electronic throttle and shift (ETS) system offers smooth, precise control, while the Engine Control Module (ECM) monitors engine performance and adjusts fuel delivery and spark advance for optimal power and economy under varying load conditions.

The BG74B GM 454/7.4 Base Engine is built to withstand the harsh marine environment. Its robust construction includes a cast iron block and aluminum heads, ensuring durability and longevity. The engine is also equipped with a Water Separator System (WSS) that prevents water from entering the engine and causing damage, further enhancing its reliability and longevity.

For ease of maintenance, the engine features a conveniently placed accessory drive system, making it simple to access and service key components. The engine also comes with a three-year limited warranty, providing peace of mind to boaters who demand the best.

In summary, the Mercruiser BG74B GM 454/7.4 Base Engine is a powerful, efficient, and reliable marine propulsion solution ideal for boaters who demand the best. With its impressive power output, advanced fuel injection system, and robust construction, this engine delivers the performance, reliability, and efficiency that serious boaters require.

The Mercruiser BG74B GM 454/7.4 Base Engine is a powerful marine engine, known for its durability and performance. Here are some pros and cons to help you make an informed decision:

1. Power: With a displacement of 454 cubic inches, this engine offers significant power, making it suitable for larger boats and high-speed applications.

2. Reliability: Mercruiser engines are known for their robustness, and the BG74B is no exception. It's designed to withstand the harsh marine environment.

3. Fuel Efficiency (for a V8 engine): Compared to other V8 marine engines, the BG74B offers relatively good fuel efficiency, thanks to its electronic fuel injection system.

4. Wide Availability: The engine is widely available, and parts are easy to find, ensuring easy maintenance and repair.

1. Size and Weight: Given its size and weight, this engine may not be ideal for smaller boats or those seeking a lighter weight option.

2. Fuel Consumption: Despite being relatively fuel-efficient for a V8, the BG74B still consumes more fuel than smaller engines, which can lead to higher running costs.

3. Cost: The engine's high power and robustness come at a price. It's typically more expensive than smaller, less powerful marine engines.

4. Emissions: Older models may not meet modern emissions standards, which could be a concern for some boaters.

The Mercruiser BG74B GM 454/7.4 Base Engine is a reliable, powerful engine suitable for larger boats that require high performance. However, its size, weight, fuel consumption, and cost may make it less ideal for smaller boats, budget-conscious buyers, or those prioritizing lower emissions.

If you're looking for a powerful, reliable engine for a larger boat and are willing to pay the associated costs, the Mercruiser BG74B GM 454/7.4 Base Engine could be a good choice. If you're looking for a smaller, more fuel-efficient or budget-friendly option, you may want to consider other marine engine models.

Details:

Estimated hipping times may vary by season. Timing components new. Customer Pick-up Free. Pleasure craft.

Block refurbished. Oil pan new. Valve covers new. Remanufactured/Rebuilt/Refurbished/Re powered Base Engine.

Timing cover new. Left Hand Rotation. Crankshaft new or refurbished. Limited Warranty: 2-Year Warranty included with purchase.

Oil pump new. Set up for 6-bolt timing cover. Replacement for. Lifters new.

Camshaft new or refurbished. Push rods new or refurbished. Engine is clean, painted, and torqued to perfection. Connecting rods new or refurbished.

Pistons new. Rocker arm assembly new or refurbished. Cylinder Heads refurbished. All bearings-cam/rod/main new.

Base Engine includes the following, with new and refurbished internal parts.

part #: bg74b prices

• $127.00-$238.50

specifications completegengin:

• for models: 454
• brand: Mercruiser
• mpn: Bg74b
• part type: Engine
• non-domestic product: No
• stroke: 4-stroke
• warranty: 2 Year
• engine hp : 330
• country/region of manufacture: United States
• rotation: Left-hand

general completegengin:

• condition: Remanufactured
• Boat Parts > Inboard Engines Components > Complete Gas Engines

offer completegengin:

• quantity: 1
• options: Ship-to-home
• started: October 8, 2025
• availability: In Stock
• sold: 0

seller completegengin:

• city: Hialeah, Florida
• # reviews: 171
• rating: 100.0%

shipping completegengin:

payments completegengin:

• credit card: Visa
• other
• wallet: Google-pay

returns completegengin:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

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