OMC Thrust Washer Propeller 0318959 9.9 15HP

( Brand: Omc ), ( Manufacturer Part Number: 318959 ), ( Part Type: Washer Propeller )

Review OMC Thrust Washer Johnson Evinrude Oem 9.9 15hp Propeller

The **OMC 318959 Thrust Washer** is a precision-engineered marine component designed exclusively for Johnson Evinrude outboard motors, specifically tailored to models with a 9.9-inch diameter propeller and 15 horsepower output. This high-performance thrust washer serves as a critical interface between the propeller and the motor s lower unit, ensuring optimal power transfer while minimizing wear and tear on the drive components. Crafted from durable, corrosion-resistant materials, this washer is engineered to withstand the demanding conditions of saltwater and freshwater environments, making it an essential part of maintaining peak performance and longevity for your Evinrude outboard. Its unique design allows for smooth, efficient rotation of the propeller shaft, reducing friction and preventing premature damage to the propeller or motor housing. Whether you re navigating rough waters, towing heavy loads, or simply cruising at high speeds, this thrust washer helps sustain the motor s efficiency by evenly distributing thrust forces and absorbing minor misalignments. Perfect for both recreational boaters and serious anglers, the **OMC 318959** ensures that your Johnson Evinrude outboard operates at its best, delivering reliable power and smooth operation for years of trouble-free use.

### **Pros and Cons of buying a OMC 318959 Thrust Washer (Johnson/Evinrude 0318959, 9.9" x 15HP Propeller)**

1. **Compatibility** This thrust washer is designed specifically for Johnson/Evinrude outboards, ensuring a proper fit and optimal performance. It is engineered to work seamlessly with the 0318959 model series, reducing the risk of mechanical issues.

2. **Enhanced Thrust and Maneuverability** Thrust washers are designed to improve forward thrust and turning ability, making them ideal for boats that require better handling in tight spaces, such as fishing boats, pontoons, or personal watercraft. This particular model is likely optimized for mid-sized outboards, providing better control and acceleration.

3. **Durability** OMC (Outboard Marine Corporation) is a reputable brand known for manufacturing reliable marine components. This thrust washer is likely constructed from high-quality materials, such as marine-grade aluminum or stainless steel, to withstand the demands of saltwater and frequent use.

4. **Compatibility with 15HP Outboards** The 9.9" diameter suggests it is designed for smaller to mid-sized outboards, including 15HP engines. This makes it suitable for boats like bass boats, kayaks, or small personal watercraft where a compact yet powerful thrust washer is needed.

5. **Ease of Installation** Since it is an OEM (Original Equipment Manufacturer) part, it should be relatively straightforward to install, especially if you have basic mechanical skills. Replacement parts are widely available, and installation guides are often provided by OMC or dealerships.

6. **Performance Boost** Thrust washers can improve fuel efficiency and reduce strain on the engine by optimizing water flow around the propeller. This can lead to better overall performance and longevity of the outboard.

7. **Warranty Coverage** As an OMC part, it may come with a manufacturer s warranty, providing peace of mind against defects in materials or workmanship.

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1. **Cost** Replacement thrust washers can be relatively expensive, especially if purchased new. Depending on the market, this part may cost between $100 and $300 or more, depending on whether it is new or refurbished.

2. **Potential for Wear and Tear** Thrust washers are exposed to abrasive environments, particularly in saltwater. Over time, they can corrode or wear out, requiring frequent inspections and possible replacements.

3. **Installation Challenges** While generally straightforward, improper installation can lead to issues such as misalignment, reduced thrust, or even damage to the outboard. If you are not experienced with marine mechanics, hiring a professional may be necessary.

4. **Limited Lifespan** Thrust washers are not designed to last indefinitely. Factors such as saltwater corrosion, debris impact, and wear from constant use can shorten their lifespan. Regular maintenance and cleaning are essential to prolong their service life.

5. **Compatibility Issues with Modifications** If your outboard has been modified (e.g., with aftermarket propellers or exhaust systems), the thrust washer may not perform as intended. Always verify compatibility with any modifications before purchasing.

6. **Availability of Alternatives** While OMC parts are reliable, there may be aftermarket alternatives that are cheaper or offer different performance characteristics. However, these alternatives may not be as durable or compatible as OEM parts.

7. **Maintenance Requirements** Thrust washers require regular cleaning to remove marine growth (e.g., barnacles, algae) and debris. Neglecting maintenance can lead to reduced performance or damage over time.

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The OMC 318959 thrust washer is a high-quality, OEM-recommended part designed to enhance the performance and maneuverability of Johnson/Evinrude 0318959 outboards, particularly those paired with 15HP engines. Its pros such as improved thrust, durability, and compatibility make it a worthwhile investment for boat owners who prioritize reliability and performance. However, the cons including cost, potential wear, and maintenance needs should be carefully considered, especially if you are on a tight budget or lack experience with marine repairs.

If your outboard is experiencing reduced thrust, poor handling, or signs of wear on the existing thrust washer, replacing it with this OMC part is likely a smart upgrade. However, if you are unsure about installation or maintenance, consulting a marine mechanic may be advisable to ensure proper fitment and longevity.

- You are experiencing performance issues with your current thrust washer.

- You want a reliable, OEM-approved part that enhances thrust and maneuverability.

- You are comfortable with installation or have access to a mechanic for assistance.

- Your budget allows for the cost, considering the long-term benefits.

- You are unsure about the compatibility with your specific outboard model or modifications.

- You are looking for a significantly cheaper alternative and are willing to accept potential trade-offs in performance or durability.

- You do not have the time or resources for regular maintenance to keep the thrust washer in optimal condition.

**Final Verdict:** For most boat owners running a Johnson/Evinrude 0318959 outboard, this thrust washer is a solid, practical choice that justifies its cost through improved performance and longevity. Purchasing from an authorized dealer ensures authenticity and warranty coverage, making it a recommended upgrade for those seeking better handling and efficiency.

Details:

Why OEM matters. Perfect for replacing a worn, grooved, or missing thrust washer during propeller service. Works with OEM prop nut, spacer, and hardware kits. Hardened steel for long life.

Genuine OEM OMC / Johnson Evinrude Thrust Washer Part #318959 0318959 This is the factory propeller thrust washer used on Johnson/Evinrude 9.9HP and 15HP outboards. Johnson/Evinrude 9.9 HP 15. The OMC 318959 Thrust Washer is a genuine Johnson Evinrude OEM part designed for 9.9 to 15HP propellers. 1974 1992 2 stroke model's.

OEM washers ensure correct prop spacing, proper load distribution, and long term durability aftermarket often use softer metal or incorrect dimensions that cause wobble premature wear. Correct thickness diameter. While it does not come with a warranty, you can trust in its quality and reliability for seamless boating experience. Fits Common Applications.

Stored in climate controlled inventory. Produced by OMC, this thrust washer is a crucial component for maintaining the optimal performance of your boats engine. Zero fitment issues. Prevents prop slippage and gear case wear.

part #: 318959 prices

• $8.99-$15.00

specifications ouboaen:

• for makes: Johnson, Evinrude, Omc
• brand: Omc
• mpn: 318959
• part type: Washer Propeller

offer ouboaen:

• options: Ship-to-home
• sold: 0
• quantity: 1
• started: April 9, 2026
• availability: In Stock
• best offers: True

returns ouboaen:

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

seller ouboaen:

• rating: 99.5%
• # reviews: 353
• city: Sioux Falls, South Dakota

general ouboaen:

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

payments ouboaen:

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

shipping ouboaen:

• service: USPS Ground Advantage
• carrier: USPS
• transit: 4-8 Days
• type: Calculated
• cost: $5.00
• class: Standard

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