OMC 550989 Outboard Impeller Nos OMC68

( Brand: Omc ), ( Manufacturer Part Number: 550989 ), ( Part Type: Impeller )

Review OMC Genuine Johnson Evinrude Outboard Vintage Impeller Nos Oem

The **OMC 550989 Johnson Evinrude Outboard Impeller (NOS OMC68)** is a high-performance, factory-new (NOS) replacement impeller designed specifically for Johnson and Evinrude outboard motors, ensuring optimal propulsion and efficiency for your marine engine. Crafted from durable, high-grade materials, this impeller features a precision-engineered, five-blade design optimized for maximum thrust and fuel economy, making it ideal for both recreational and performance-oriented applications. The impeller s robust construction minimizes wear and tear, extending the lifespan of your outboard s lower unit while maintaining smooth operation and reducing vibration. Compatible with a wide range of Johnson and Evinrude outboards, including models from the E-TEC, E-TEC HP, and E-TEC XP series, this impeller is a direct-fit replacement for the original OMC part number **OMC68**, ensuring seamless integration without the need for modifications. Whether you re restoring an older engine or upgrading a modern outboard, this impeller delivers reliable performance, enhanced power delivery, and improved fuel efficiency, making it a must-have component for any serious boater looking to maintain peak engine performance. Its clean, uninstalled condition guarantees that you re receiving a genuine, high-quality part ready for immediate use, ensuring your outboard operates at its best for years to come.

### **Pros and Cons of Buying a Used OMC 550989 Johnson/Evinrude Outboard Impeller (OMC68) No Serial Number (NOS)**

#### **Pros**

1. **Performance and Reliability**

The OMC 550989 Johnson/Evinrude impeller (OMC68) is designed for high-performance outboards, particularly in Evinrude E-TEC and Johnson ThrustSSC models. When in good condition, it ensures efficient water flow, reducing strain on the engine and improving throttle response. A well-maintained impeller can significantly enhance fuel efficiency and power output.

2. **Compatibility with Popular Engines**

This impeller is commonly used in mid-sized outboards (typically 150 250 HP range), making it a versatile part for older Johnson/Evinrude models. If the engine is compatible, replacing a worn or damaged impeller can restore performance to near-new levels.

3. **Cost-Effective Replacement Option**

Purchasing a NOS (New Old Stock) impeller can be cheaper than buying an OEM replacement directly from Johnson/Evinrude, especially if the part is no longer in active production. This makes it an attractive option for budget-conscious boat owners.

4. **Potential for Engine Restoration**

If the engine has been neglected, a new impeller can be part of a broader restoration effort. Coupled with other rebuilt components (e.g., water pump, seals, and gaskets), it can extend the life of an older outboard that might otherwise be deemed unsalvageable.

5. **Aftermarket Availability**

Since Johnson/Evinrude parts are widely available in the aftermarket, finding a NOS impeller is relatively straightforward. Many marine parts dealers and online marketplaces (e.g., eBay, Facebook Marketplace, Craigslist) list these items.

---

#### **Cons**

1. **No Serial Number (Potential Authenticity Issues)**

The lack of a serial number makes it difficult to verify the impeller s authenticity, origin, or condition history. There is a risk of purchasing a counterfeit or salvaged part that may not fit correctly or could fail prematurely. This is particularly concerning if the seller cannot provide documentation or a clear provenance.

2. **Condition Unknown**

Since the impeller is NOS (no serial number), there is no way to confirm whether it has been previously used or if it was stored improperly (e.g., exposed to moisture, corrosion, or damage). A used impeller may have micro-cracks, warping, or pitting that could lead to engine damage if installed.

3. **Fitment Risks**

Even if the impeller appears to match the engine model, slight variations in manufacturing tolerances or wear in the engine s impeller housing could cause improper sealing or binding. This may result in leaks, reduced performance, or even engine damage if the impeller does not rotate freely.

4. **Lack of Warranty or Return Policy**

NOS parts often come without warranties, especially if purchased from private sellers. If the impeller fails shortly after installation, there may be no recourse for a replacement or refund, leaving the owner with costly repairs.

5. **Potential for Counterfeit Parts**

The marine aftermarket is not immune to counterfeit parts, particularly for older or discontinued models. A counterfeit impeller may be made from lower-quality materials, leading to premature wear or failure. Without a way to verify authenticity (e.g., serial number, manufacturer s markings), this is a significant risk.

6. **Installation Challenges**

Replacing an impeller requires removing the lower unit, which can be labor-intensive and may require specialized tools. If the boat owner lacks mechanical experience, professional installation could add to the cost, negating some of the savings from buying NOS.

7. **Depreciation and Long-Term Value**

While a NOS impeller may be a good deal upfront, older outboards (especially those without maintenance records) may still require frequent replacements of other components (e.g., water pump, seals, and bearings). Investing in a NOS impeller without addressing these issues could lead to recurring expenses.

---

### **Conclusion**

Buying a NOS OMC 550989 Johnson/Evinrude impeller (OMC68) can be a cost-effective way to restore performance to an older outboard, particularly if the engine is otherwise in good condition. The lack of a serial number introduces risks related to authenticity, condition, and fitment, but these can be mitigated with thorough due diligence. If the impeller is purchased from a reputable dealer with a return policy or warranty, the pros may outweigh the cons. However, if the seller is unknown or the impeller s history is unverifiable, the risks of purchasing a counterfeit, damaged, or incorrectly sized part could lead to costly engine damage.

---

### **Recommendation**

1. **Verify the Impeller s Authenticity**

- Request detailed photos showing the impeller s markings, material, and any packaging or documentation.

- Compare it to known genuine parts (e.g., from manufacturer manuals or online forums like *Boat Design Net* or *Evinrude/Johnson forums*).

- If possible, consult a marine mechanic to inspect the impeller before purchase.

2. **Check Engine Compatibility**

- Confirm the exact model and year of the outboard to ensure the impeller is the correct size and type (e.g., OMC68 for E-TEC/ThrustSSC models).

- Measure the impeller s diameter and blade pitch against the engine s specifications.

3. **Purchase from a Trusted Source**

- Prefer dealers or sellers with return policies, warranties, or positive reviews.

- Avoid private sellers with no verifiable history unless the impeller comes with proof of authenticity (e.g., original packaging, manufacturer s stamp).

4. **Consider Professional Installation**

- If unsure about the installation process, have a marine mechanic perform the replacement to avoid damaging the engine.

5. **Budget for Additional Repairs**

- Replacing an impeller may expose other worn components (e.g., water pump, seals). Allocate funds for a full lower-unit inspection or rebuild if necessary.

6. **Alternative Options**

- If the risk of purchasing NOS is too high, consider buying an OEM replacement from Johnson/Evinrude or a reputable aftermarket supplier (e.g., *Marine Parts Warehouse*, *Sea-Dog Marine*).

- For older engines, a rebuilt lower unit from a marine restoration shop may be a safer long-term investment.

The purchase of a NOS OMC 550989 impeller can be justified if the seller is trustworthy, the impeller is thoroughly inspected, and the engine is otherwise sound. However, the lack of a serial number introduces significant uncertainty, making it a higher-risk purchase compared to OEM or verified aftermarket parts. For most boat owners, the peace of mind from a warranted, authenticated part may be worth the slightly higher upfront cost.

Details:

Genuine Johnson Evinrude Outboard Vintage Impeller 550989 NOS OEM OMC68. Shipped with USPS Ground Advantage.

part #: 550989 prices

• $10.99-$16.00

specifications ouboaen:

• for makes: Johnson, Evinrude, Omc
• brand: Omc
• mpn: 550989
• part type: Impeller

offer ouboaen:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0
• started: February 22, 2026

payments ouboaen:

• credit card: Visa
• wallet: Paypal
• other

seller ouboaen:

• rating: 99.4%
• # reviews: 7512
• city: Spokane, Washington

shipping ouboaen:

• carrier: USPS
• transit: 4-9 Days
• service: USPS Ground Advantage
• cost: $0.00
• type: Calculated
• class: Standard

returns ouboaen:

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

general ouboaen:

• Boat Parts > Outboard Engines Components > Electrical Systems
• condition: New other see details

Omc 550989 Is Similar To:

• 0123278 0123610 Omc Johnson Evinrude Outboard Motor Binnacle Control Box Handle Kit (42.5% similar) New handle kit fits single and dual mount binnacle controls...(May 28th, 2018)
• 0127084 Brp Evinrude Johnson Omc Stringer Thrust Washer (30.8% similar) Thrust washer...(July 2nd, 2018)
• 0173298 Omc Johnson Evinrude Emergency Ignition Shut Off Switch Nos (39.4% similar) Omc,evinrude,johnson new shut off stop switch kit. These kits are new old stock, they have not been used or opened, this product is no longer in production. Part number: 0173298RETAIL: 22...(March 2nd, 2019)
• 0174033 Omc New Johnson Evinrude (41.1% similar) New oem switch and connector am. If you choose the slow cheap option will get exactly what pay for...(April 30th, 2017)
• 0174811 174811 Johnson Evinrude Omc Stainless Prop Lh Outboard Propeller (49% similar) Condition: used but in good condition and guaranteed to function properly. Part: johnson evinrude stainless LHS counter rotation viper prop x 19P v6 outboard propeller fits various motor parts. Pb please see included pictures...(October 30th, 2018)
• 0176360 176360 Omc Horn Assy Johnson Evinrude (36.7% similar) Part: 2004 -2005 prices...(March 17th, 2019)
• 0176361 176361 Omc Part Horn Kit Ay Instructions Oem (25.2% similar) New in package...(November 29th, 2018)
• 0176461 Omc Nos Johnson Evinrude Remote Oil Fill Kit (40.9% similar) New Omc item in box...(November 29th, 2018)
• 0176711 176711 0768411 768411 0176711 176711 0768411 Johnson-evinrude-omc-brp 745419070984 (25.5% similar) Never installed or used...(September 11th, 2017)
• 0177284 Evinrude Brp Omc Johnson Outboard Gallon Remote Oil Tank Sensor (41.1% similar) Omc, evinrude, johnson e-etc outboard motor 3 gallon remote oil tank w bracket. Mounting bracket not included. Good for all Omc, evinrude, johnson model's including e-etc will work with Fichte oil sensor has continuity...(January 7th, 2019)
• 0203362 Omc Evinrude Johnson 203362 (32.7% similar) Evinrude johnson cam follower roller and shaft fits diameter 5HP 1957 only fits 10HP 1961 18HP only 1961 ROLLER is...(January 12th, 2018)