1. Boat Outboard Engines To Buy
  2. sku: 24327800537510893
  3. JOHNSON 398022

JOHNSON 398022 Evenrude Carburetor Johnson/ 9.9

fits make: Johnson.

398022 Johnson Johnson/ Evenrude 9.9 Hp Carburetor

( Manufacturer Part Number: 398022 ), ( Part Type: Hp Carburetor )

Review JOHNSON Johnson/ Evenrude 9.9 Hp Carburetor

The **Johnson 398022 (EvenRude) 9.9 Horsepower Carburetor** is a meticulously engineered, high-performance fuel delivery system designed exclusively for Johnson and EvenRude outboard motors, ensuring optimal throttle response, fuel efficiency, and reliability across a wide range of boating applications. This precision-crafted carburetor is built to meet the demanding requirements of modern marine engines, delivering a seamless blend of power and smooth operation whether you're cruising on calm waters, towing a wakeboarder, or navigating through rough conditions. The **9.9 HP model** is specifically tailored for mid-sized outboards, offering a balanced performance profile that maximizes horsepower while maintaining fuel economy and minimizing emissions making it an ideal choice for anglers, skiers, and recreational boaters alike.

At its core, the **Johnson 398022 carburetor** features a robust, durable construction with high-quality materials that resist corrosion, vibration, and wear, ensuring longevity even under the harshest marine environments. Its **floating bowl design** allows for consistent fuel delivery, preventing air leaks and fuel starvation that can disrupt engine performance. The carburetor incorporates a **precision-engineered throttle body** with a smooth-operating butterfly valve, providing instant throttle response and eliminating hesitation during acceleration. Additionally, the **adjustable idle mixture screw** allows for fine-tuning to optimize engine performance under varying load conditions, whether you're trolling at low speeds or operating at full throttle.

For ease of maintenance and accessibility, the **Johnson 398022** is designed with a modular approach, allowing for quick and straightforward disassembly and cleaning. The **fuel passages and jets** are strategically positioned for easy access, ensuring that routine upkeep such as cleaning carbon deposits or replacing worn seals can be performed efficiently without requiring specialized tools. The carburetor also integrates with Johnson s **EvenRude engine management system**, ensuring compatibility with modern outboard controls and diagnostic tools for hassle-free servicing. Whether you're a seasoned mechanic or a do-it-yourself enthusiast, this carburetor is built with practicality in mind, reducing downtime and keeping your engine running at peak efficiency.

Beyond its technical specifications, the **Johnson 398022 carburetor** embodies the reliability and performance legacy of the Johnson brand, a name synonymous with innovation in marine propulsion. It is engineered to withstand the rigors of daily use while delivering the power and smoothness expected from a premium outboard motor. Whether you're launching a fishing boat, a personal watercraft, or a family-friendly cruiser, this carburetor ensures that your engine performs with the precision and consistency required to make every outing enjoyable. With its combination of durability, adjustability, and seamless integration with Johnson s engine lineup, the **9.9 HP carburetor** is an essential component for anyone seeking a balance of power, efficiency, and long-term dependability in their marine setup.

### **Pros and Cons of buying a Johnson 398022 (Johnson/Evenrude 9.9 HP Carburetor)**

#### **Pros:**

1. **Compatibility** The Johnson 398022 carburetor is designed specifically for Johnson and Evenrude 9.9 HP outboards, ensuring a proper fit and optimized performance for these engines.

2. **Reliability** Johnson and Evenrude are well-known brands with a history of durable marine engines. A genuine or high-quality aftermarket carburetor should maintain reliable operation if properly maintained.

3. **Performance Optimization** A properly functioning carburetor ensures smooth acceleration, better fuel efficiency, and consistent power delivery, which is crucial for small outboards like the 9.9 HP.

4. **Ease of Maintenance** Many carburetors from this era are relatively simple to disassemble, clean, and adjust, making routine maintenance more accessible for DIYers.

5. **Availability of Parts** Since Johnson and Evenrude are older but still common brands, replacement parts, including carburetors, are often available through marine dealers, online retailers, or salvage yards.

6. **Cost-Effective Upgrade** If the original carburetor is worn or leaking, replacing it can restore engine performance without requiring a full engine overhaul.

7. **Compatibility with Aftermarket Tuning** Some enthusiasts modify these engines with performance carburetors or fuel systems, and the 398022 may serve as a baseline for such upgrades.

#### **Cons:**

1. **Age and Wear** The Johnson/Evenrude 9.9 HP engines (and their carburetors) are from an older generation (likely late 1970s to early 1980s). If the carburetor is original, it may be worn out, clogged, or prone to leaks.

2. **Fuel System Challenges** Older carburetors can suffer from gumming, corrosion, or fuel line issues, especially if the boat has been stored for long periods without use. This may require additional cleaning or replacement of fuel lines and filters.

3. **Limited Modern Support** Unlike newer outboards, finding a dealer with direct support for these carburetors may be difficult. Most marine shops today focus on newer brands, so troubleshooting could require more research or specialized help.

4. **Potential for Fuel Contamination** If the boat has been sitting idle, fuel degradation (ethanol contamination, water, or sediment) can damage the carburetor. Flushing the system may be necessary before installation.

5. **Skill Dependency** Adjusting a carburetor requires some mechanical knowledge. Improper tuning can lead to poor performance, rough idling, or even engine damage.

6. **Cost of Replacement vs. Engine Replacement** If the engine itself is failing (e.g., worn piston rings, rod bearings, or fuel pump issues), replacing just the carburetor may not be a long-term solution. In some cases, a used or rebuilt engine could be more cost-effective.

7. **Environmental and Emissions Concerns** Older carbureted engines may not meet modern emissions standards if used in certain areas. While the 9.9 HP is small, some regions restrict or ban older outboards due to pollution concerns.

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### **Conclusion**

The Johnson 398022 carburetor is a practical choice if you need to restore or maintain a Johnson/Evenrude 9.9 HP outboard, provided the rest of the engine is in decent condition. It offers compatibility, reliability, and performance benefits when functioning correctly. However, its age introduces challenges like potential wear, fuel system issues, and limited modern support. If the engine is otherwise healthy, replacing the carburetor can be a cost-effective fix. If the engine is failing in multiple components, a more comprehensive evaluation (or engine replacement) may be warranted.

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### **Recommendation**

1. **Inspect the Engine First** Before purchasing the carburetor, ensure the rest of the engine (piston, rod, bearings, fuel pump, and ignition system) is in working order. A failing engine will not benefit from just a carburetor replacement.

2. **Clean or Replace Fuel System Components** If the boat has been stored, flush the fuel tank, replace old fuel lines, and clean or replace the fuel filter to prevent clogging the new carburetor.

3. **Consider a Rebuilt or Used Engine** If the engine is old and unreliable, a used or rebuilt Johnson/Evenrude 9.9 HP engine (often available for under $200 $500) may be more cost-effective than piecemeal repairs.

4. **Test the Carburetor Before Full Installation** If possible, test the carburetor on a known-good engine or use it as a donor part to verify it functions properly before committing to full installation.

5. **Document Adjustments** If tuning the carburetor, keep notes on idle mixture, throttle response, and fuel pressure to ensure optimal performance.

6. **Store Properly** If the boat will be idle again, use fuel stabilizer, drain the fuel system, and consider a carburetor fogging spray to protect it from corrosion.

**Final Verdict:** The Johnson 398022 carburetor is a solid choice for restoring a 9.9 HP Johnson/Evenrude engine, but it should be part of a broader maintenance or replacement strategy. If the engine is otherwise sound, the carburetor will improve performance and reliability. If the engine is failing, weigh the cost of repairs against the value of the boat.

Details:

Rebuilt carburetor as-is in great shape.

part #: 398022 price

  • $200.00

specifications ouboaen:

  • for makes: Johnson
  • mpn: 398022
  • part type: Hp Carburetor

offer ouboaen:

  • options: Ship-to-home
  • quantity: 1
  • started: June 1, 2026
  • sold: 0
  • best offers: True
  • availability: In Stock

payments ouboaen:

  • credit card: Mastercard
  • other
  • wallet: Apple-pay

returns ouboaen:

  • policy: No Returns

shipping ouboaen:

  • cost: $10.69
  • type: Calculated
  • transit: 4-10 Days
  • service: USPS Ground Advantage
  • class: Standard
  • carrier: USPS

seller ouboaen:

  • # reviews: 48
  • city: Westport, Massachusetts
  • rating: 100.0%

general ouboaen:

  • condition: Remanufactured
  • Boat Parts > Outboard Engines Components > Other
for makes: johnson, part type: hp carburetor,
category: boat parts > outboard engines components, sku: 24327800537510893,
Johnson 398022 Is Similar To:
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1 offer $200.00 USD
  • Remanufactured. Offer #1 priced at $200.00 + $10.69 shipping estimate = $210.69* total. Rebuilt carburetor as-is in great shape.+$10.69 shipping

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