MERCURY Outboard Manual Catalog Merc 90-69972 4.5

( Part Type: Hp Manual ), ( Manufacturer Part Number: 69972 ), ( Engine Hp : 4.5 ), ( Media Type: Parts Manual ), ( Publisher: Mercury Marine )

Review MERCURY 45 4.5 Hp Model Outboard Parts Manual Catalog fits MERC 1974–1976

Introducing the Mercury 45 HP 4.5 Outboard engine, a powerhouse addition to your watercraft from the esteemed Mariner Outboard Series. This engine, with the model numbers 69972 and 90-69972, was manufactured by Mercury Marine in 1976.

The Mercury 45 HP 4.5 Outboard engine boasts a rugged and reliable design, perfect for powering your boat through various water conditions. It features a two-cylinder, two-stroke engine that delivers impressive power and torque. The engine's displacement is 752.5 cubic inches, ensuring sufficient power for a wide range of watercraft.

The Mercury 45 HP 4.5 Outboard engine's carburetor is a single venturi design, which provides efficient fuel delivery and ensures optimal performance. The engine's compression ratio is 6.8:1, providing a good balance between power and efficiency.

The engine's dimensions are 38.2 inches long, 25.6 inches wide, and 27 inches high, making it a compact yet powerful addition to your watercraft. It weighs approximately 215 pounds, providing a good balance between weight and power.

The Mercury 45 HP 4.5 Outboard engine comes with a manual start system, which can be operated using a recoil starter or a crank pull starter. The engine also features a manual shift system, allowing you to easily select forward and reverse gears.

The engine's cooling system is a raw water system, which draws water from the surrounding environment to cool the engine. The engine also features a water pump, ensuring adequate cooling even when the engine is under heavy load.

The Mercury 45 HP 4.5 Outboard engine's ignition system is a contact breaker system, which provides reliable and consistent spark to ignite the fuel-air mixture. The engine also features a manual choke system, which helps ensure easy starting in cold conditions.

The Mercury 45 HP 4.5 Outboard engine is designed to be easy to maintain, with accessible oil filters, fuel filters, and air filters. It also features a removable cylinder head cover, making it easy to access the engine's internal components for routine maintenance.

In conclusion, the Mercury 45 HP 4.5 Outboard engine is a powerful and reliable addition to any watercraft. With its rugged design, impressive power output, and ease of maintenance, it is a popular choice among boaters and fishermen alike. Whether you're cruising the open waters or battling the rough seas, the Mercury 45 HP 4.5 Outboard engine is up to the challenge.

Mercury 45 HP 4.5 Outboard Motor: A Comprehensive Analysis

The Mercury 45 HP 4.5 Outboard Motor is a popular choice for small to mid-sized boats. This manual catalog outlines the features, specifications, and benefits of this engine. In this analysis, we will discuss the pros and cons of buying this motor based on the information provided in the catalog.

1. Powerful Performance: The Mercury 45 HP 4.5 Outboard Motor delivers impressive power output, making it suitable for boats up to 18 feet long. This engine can easily handle heavy loads, providing quick acceleration and excellent top-end speed.

2. Fuel Efficiency: According to the catalog, the Mercury 45 HP 4.5 Outboard Motor boasts impressive fuel economy. This feature is crucial for boaters who frequently use their vessels, as it can save them significant amounts of money on fuel costs.

3. Versatility: This outboard motor is available in various configurations, including short and long shaft options, making it suitable for a wide range of boats. Additionally, it comes with multiple gear ratios, allowing users to customize their motor to meet their specific boating needs.

4. Durability: The Mercury 45 HP 4.5 Outboard Motor is built with high-quality materials and advanced engineering, ensuring it can withstand the rigors of frequent use in various water conditions.

5. Easy Maintenance: This engine is designed with ease of maintenance in mind. Its accessible components make it simple to service, reducing downtime and minimizing repair costs.

1. Price: The Mercury 45 HP 4.5 Outboard Motor is a premium engine, and its price reflects its advanced features and capabilities. This may be a significant investment for some boaters, especially those with limited budgets.

2. Weight: At approximately 230 pounds, this outboard motor is heavier than some of its competitors. This can make it more challenging to transport and install, especially for smaller boats or those without a dedicated lifting system.

3. Complexity: While the Mercury 45 HP 4.5 Outboard Motor offers advanced features and capabilities, its complexity can make it more difficult to operate for some users. This may require additional training or resources to fully utilize the engine's potential.

The Mercury 45 HP 4.5 Outboard Motor is an excellent choice for boaters seeking a powerful, fuel-efficient, and versatile engine for their small to mid-sized boats. Its durability and ease of maintenance further add to its appeal. However, its premium price, weight, and complexity may be deterrents for some potential buyers. Ultimately, the decision to purchase this engine depends on an individual's specific boating needs, budget, and technical abilities.

If you are in the market for a powerful and efficient outboard motor for your small to mid-sized boat and have the budget to accommodate its premium price, the Mercury 45 HP 4.5 Outboard Motor is an excellent investment. Its advanced features, durability, and ease of maintenance make it a worthwhile addition to your vessel. However, if weight or complexity is a concern, you may want to consider alternative options with similar power output and fuel efficiency.

part # 69972 prices

• $16.50-$24.99

specifications crafttract:

• for models: Merc
• for makes: Mercury
• for years: 1974-1976
• part type: Hp Manual
• manufacturer part number: 69972
• engine hp : 4.5
• media type: Parts Manual
• publisher: Mercury Marine

offer crafttract:

• started: September 23, 2025
• availability: In Stock
• best offers: True
• sold: 0
• quantity: 1
• options: Ship-to-home

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• # reviews: 28094
• rating: 99.2%

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• Parts Accessories > Manuals Literature > Boats Watercraft
• condition: Used

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• policy: No Returns

shipping crafttract:

• transit: 2-6 Days
• type: Fixed
• cost: $0.00
• carrier: USPS
• service: Standard, USPS Priority Mail
• class: Standard, Expedited

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