EVINRUDE 278555 Carburetor Carb Freshwater 5.5HP

( Brand: Evinrude ), ( Manufacturer Part Number: 278555 ), ( Part Type: 5hp Carburetor ), ( Country Of Origin: United States )

Review EVINRUDE Johnson Oem 5.5hp Carburetor Carb Freshwater

The **Evinrude 278555 Johnson 5.5HP Carburetor Kit for Freshwater Engines** is a meticulously engineered replacement part designed to restore peak performance and reliability to Johnson outboard motors, particularly those in the 5.5 horsepower class. This high-quality carburetor assembly is crafted to meet the exact specifications of Evinrude s freshwater models, ensuring seamless integration with the engine s fuel delivery system. Built with precision-machined components, the carburetor features a durable aluminum body, corrosion-resistant materials, and a robust throttle linkage system that guarantees smooth operation and optimal fuel-air mixture regulation. Ideal for both professional mechanics and DIY enthusiasts, this kit includes all necessary gaskets, seals, and mounting hardware, simplifying installation while minimizing the risk of leaks or improper fitment. Whether replacing an aging carburetor or upgrading an older engine for improved efficiency, this part delivers the performance consistency required for fishing, boating, or recreational watercraft. Its compatibility with a wide range of Johnson 5.5HP engines including those from the 2000s and beyond makes it a trusted solution for maintaining power, fuel economy, and longevity in freshwater applications. With proper installation and regular maintenance, this carburetor kit ensures your outboard runs cleanly, efficiently, and with the power you expect from a Johnson 5.5HP engine.

### **Pros and Cons of buying a Evinrude 278555 Johnson 5.5HP Carburetor (Freshwater)**

1. **Compatibility** This carburetor is designed specifically for Johnson 5.5HP outboard motors, ensuring a proper fit and optimized performance. It is part of the Evinrude/Johnson legacy, meaning it is well-tested and widely available for repairs or replacements.

2. **Reliability** Johnson 5.5HP engines are known for durability, and their carburetors are built to last with proper maintenance. This carburetor is likely to provide consistent fuel delivery, reducing stalling or rough idling issues.

3. **Ease of Maintenance** The carburetor is relatively straightforward to clean and adjust compared to modern fuel-injected systems. Owners familiar with carbureted engines can perform basic tune-ups without advanced tools.

4. **Cost-Effective Replacement** Compared to newer fuel-injected models, this carbureted system is often cheaper to repair or replace. Parts like jets, floats, and diaphragms are readily available and affordable.

5. **Performance Stability** When properly tuned, a well-maintained carburetor can provide smooth power delivery, making it suitable for small boats, trolling, or light fishing applications.

6. **Secondhand Market Availability** Since Johnson 5.5HP engines are still in use, you can often find used or refurbished versions of this carburetor at lower prices, reducing upfront costs.

7. **No Electronic Dependencies** Unlike modern fuel-injected engines, this carbureted system does not rely on sensors or electronics, meaning fewer points of failure in harsh conditions.

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1. **Fuel Efficiency Concerns** Carburetors are generally less fuel-efficient than modern fuel-injected systems. If fuel economy is a priority, this may lead to higher operating costs over time.

2. **Tuning Sensitivity** Carburetors require periodic adjustments (e.g., idle screws, mixture screws) to maintain optimal performance. Neglecting tuning can result in poor acceleration, rough idling, or excessive fuel consumption.

3. **Environmental Regulations** Some regions have stricter emissions standards that may not fully apply to older carbureted engines. While the 5.5HP is relatively low-powered, future regulations could impact its usability in certain areas.

4. **Limited Modern Support** Unlike newer engines, this carbureted system may not have as much online documentation or community support for troubleshooting. Diagnostic resources are often more scarce.

5. **Potential for Leaks** Over time, rubber seals and gaskets in carburetors can degrade, leading to fuel leaks or air intake issues. Regular inspections are necessary to prevent fuel spills or performance drops.

6. **Higher Maintenance Burden** Carburetors require more frequent cleaning (e.g., removing varnish buildup) compared to fuel injection systems. This can be time-consuming for owners who prefer low-maintenance engines.

7. **Resale Value** Older carbureted engines typically have lower resale value compared to modern fuel-injected models, which may be a consideration if you plan to upgrade later.

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The **Evinrude 278555 Johnson 5.5HP carburetor** is a solid, dependable choice for those who prioritize simplicity, affordability, and ease of repair. It excels in applications where the engine is used occasionally (e.g., trolling, small boats) and where mechanical familiarity is an advantage. However, it is not ideal for high-performance or frequent-use scenarios due to its fuel inefficiency and maintenance demands.

If you are comfortable with basic engine tuning and do not require the latest emissions compliance, this carburetor is a practical and cost-effective option. For those seeking modern convenience, fuel injection may be preferable despite higher upfront costs.

- You need a reliable, low-cost replacement for a Johnson 5.5HP engine.

- You are experienced with carbureted systems or willing to learn maintenance.

- Your primary use is light-duty (e.g., fishing, trolling) rather than high-performance boating.

- You prefer mechanical simplicity over electronic fuel injection.

- You require maximum fuel efficiency or plan to use the engine frequently.

- You lack experience with carburetor tuning and adjustments.

- You are in a region with strict emissions regulations that may restrict older engines.

- You prioritize modern diagnostics and low-maintenance operation.

For most casual boaters, this carburetor remains a practical and well-supported choice, especially when paired with regular maintenance.

Details:

Good used Johnson Evinrude OEM 5.5hp Carburetor Carb 278555 Freshwater. The throttle and choke move freely the bowls are clean inside as pictured. The engine this part came from was run in freshwater only.

part #: 278555 prices

• $30.00-$53.90

specifications ouboaen:

• for makes: Johnson, Evinrude
• brand: Evinrude
• mpn: 278555
• part type: 5hp Carburetor
• country of origin: United States

seller ouboaen:

• # reviews: 648
• city: Clarksville, Michigan
• rating: 99.8%

shipping ouboaen:

• service: Economy
• type: Fixed
• cost: $0.00
• class: Economy
• transit: 3-8 Days

payments ouboaen:

• other
• credit card: Diners-club
• wallet: Google-pay

offer ouboaen:

• started: April 21, 2026
• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock

returns ouboaen:

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

general ouboaen:

• condition: Used
• Boat Parts > Outboard Engines Components > Intake Fuel Systems

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