
C-90-71706 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $16.00 | Condition is New other (see details), Mercury Merc 402, S/N 4117710 thru 4860102 Parts List Manual C-90-71706 1977, shipping cost = $8.95 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $22.50 | Top Pick! Condition is Good, OEM Mercury MERC 402 Parts Manual 1/77 Outboard Engine P/N C-90-71706 (USED), shipping cost = $5.97 | 100.0% |
![]() | $24.99 | Top Pick! Condition is Good, Mercury Merc 402 Parts Manual Outboard Engine C-90-71706 Jan 1977, shipping cost = $7.99 | 99.1% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $24.88 | Condition is Used, Mercury Merc 402 Outboard Parts Manual January 1977 C-90-71706, FREE SHIPPING | ![]() |

Introducing the Mercury C-90-71706, a part of the renowned 402 series outboard engine from Mercury Marine. This engine, with its manual transmission, is a powerful and efficient choice for your watercraft.
The Mercury 402 engine is known for its robust design and exceptional performance. This C-90 variant is no exception. It boasts a displacement of 90 cubic inches, delivering ample power and torque for a wide range of water activities, from cruising to watersports.
The engine features a reliable and durable cast iron block, ensuring its longevity and ability to withstand the rigors of frequent use. The lightweight, high-performance aluminum cylinder heads enhance power output and contribute to the engine's overall weight efficiency.
The Mercury C-90-71706 comes with a manual transmission. This option offers a more traditional boating experience, allowing you to control the engine's gear shifts manually. The manual transmission provides you with a direct connection to your engine, enabling you to optimize performance for your specific boating conditions.
The engine's advanced electronics include an electronic fuel injection system, which ensures precise fuel delivery for optimal combustion efficiency and reduced emissions. The Mercury C-90-71706 is also compatible with Mercury's Digital Throttle & Shift (DTS) system, providing you with the ability to control both throttle and shift functions electronically for added convenience and ease of use.
The Mercury C-90-71706 is designed to fit a wide range of applications, including various boat models and sizes. The engine's compact size and versatile mounting options make it an excellent choice for both small and large watercraft.
This Mercury outboard engine is not just about power and performance; it also prioritizes ease of maintenance. The engine's accessible design allows for simple oil changes and routine maintenance tasks. Additionally, the use of high-quality materials ensures that this engine will require minimal maintenance over its long lifespan.
In summary, the Mercury C-90-71706 is a powerful and efficient outboard engine, perfect for those seeking a manual transmission option. With its robust design, exceptional performance, and ease of maintenance, this engine is an excellent choice for boaters who demand reliability and versatility from their watercraft.
Mercury C-90 Outboard Engine: A Comprehensive Analysis
Introduction:The Mercury C-90 (Mercury Outboard 40HP 2-Stroke Model Number Merc 402 Manual 1/77) is a popular outboard engine among boat owners. This engine is known for its power and versatility. In this analysis, we'll discuss the pros and cons of buying this engine to help you make an informed decision.
Pros:1. Power and Performance: The Mercury C-90 delivers impressive power and acceleration, making it suitable for larger boats and heavy loads.
2. Fuel Efficiency: Compared to other 40HP engines, the Mercury C-90 is relatively fuel-efficient.
3. Durability: The engine is built with high-quality materials and features a robust design, ensuring long-lasting performance.
4. Versatility: The C-90 can be used for various applications, including fishing, water sports, and cruising.
5. Easy to Use: The manual 1/77 Merc 402 model is designed for easy maintenance and operation.
Cons:1. Emission Standards: The 2-stroke engine technology used in the Mercury C-90 does not meet modern emission standards, leading to potential environmental concerns and restrictions.
2. Noise Level: The engine is relatively loud compared to modern 4-stroke outboard engines, which may be a drawback for some users.
3. Maintenance: 2-stroke engines require more frequent oil changes and maintenance than 4-stroke engines.
4. Fuel Consumption: Although relatively fuel-efficient compared to other 2-stroke engines, the Mercury C-90 still consumes more fuel than modern 4-stroke engines.
Conclusion:The Mercury C-90 is a powerful and versatile outboard engine that delivers impressive performance. However, its use of 2-stroke technology and associated environmental concerns, noise level, and maintenance requirements are significant drawbacks.
Recommendation:If you prioritize power, performance, and affordability, the Mercury C-90 may be the right choice for you. However, if you're concerned about emissions, noise, or maintenance, you might consider investing in a modern 4-stroke outboard engine. Ultimately, your decision will depend on your specific needs, preferences, and budget.
Details:
Oem Mercury merc 402 parts manual 1/77 outboard engine p/n C-90-71706 used.
specifications heavymanualbooks:
- brand: Mercury
- mpn: C-90-71706
- part type: Manual Engine
shipping heavymanualbooks:
- class: economy
- carrier: usps
- service: usps media mail
- type: calculated
- transit: 4-8 days
seller heavymanualbooks:
- rating: 100.0%
- # reviews: 3526
- city: san juan bautista, california
offer heavymanualbooks:
- in stock #: 4
- started: april 17, 2026
- availability: in stock
- prices: $16.00–$24.99
- item condition:
- New other (see details)
- Good
- Used
- sold #: 10
- options: ship-to-home
general heavymanualbooks:
- category: Business & Industrial > Equipment, Attachments > Parts Accessories > Heavy Manuals Books
returns heavymanualbooks:
- method: money back
- paid by: buyer
- policy: returns accepted
- time: 30 days
payments heavymanualbooks:
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- other
- wallet: apple-pay
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