OMC 303479 Slow Nut Nos

( Manufacturer Part Number: 303479 )

Review OMC Slow Speed Nut Nos

The OMC 303479 Slow Nut is a high-quality marine engine accessory designed to provide optimal performance and durability for your boat's propulsion system. This slow nut is specifically engineered for use with OMC (Outboard Marine Corporation) engines, ensuring a perfect fit and seamless integration.

The OMC 303479 Slow Nut is a crucial component of the engine's drive system. It is designed to securely hold the propeller shaft in place and transmit power from the engine to the propeller. This slow nut features a unique thread design that allows for a gradual, controlled tightening process, minimizing the risk of damaging the threads or the propeller shaft.

The nut is made from high-strength materials, including a corrosion-resistant finish, ensuring it can withstand the harsh marine environment and the demanding loads placed on it by the engine and propeller. The finish also provides excellent protection against galvanic corrosion, saltwater, and UV rays.

The OMC 303479 Slow Nut comes with a convenient, reusable locking nut that helps prevent the nut from backing off during operation. This locking nut features a built-in seal to prevent water intrusion and maintain a watertight seal.

Installing the OMC 303479 Slow Nut is a straightforward process. It can be installed using standard hand tools, such as a wrench, without the need for specialized equipment or extensive mechanical expertise. The nut is designed to be easily accessible for maintenance and replacement when needed.

In summary, the OMC 303479 Slow Nut is a vital marine engine accessory that ensures optimal performance, reliability, and durability for your boat's propulsion system. Its unique thread design, high-strength materials, and corrosion-resistant finish make it an excellent choice for boat owners looking to maintain their engines and propellers in top condition.

The OMC 303479 Slow Nut Nos. is a type of marine propeller with a unique design that aims to reduce the cavitation and noise generated by the propeller. Here are some potential pros and cons of purchasing this propeller:

1. Reduced noise: The Slow Nut Nos. design aims to reduce the noise generated by the propeller by decreasing cavitation, making it an attractive option for boaters seeking a quieter cruising experience.

2. Fuel efficiency: By reducing cavitation, the propeller can also potentially improve fuel efficiency as less energy is wasted fighting cavitation.

3. Durability: OMC is a reputable brand known for producing high-quality marine parts, including propellers. The OMC 303479 Slow Nut Nos. is likely to be a durable option.

1. Cost: The OMC 303479 Slow Nut Nos. is typically more expensive than standard propellers due to its unique design and materials.

2. Limited compatibility: This propeller may not be compatible with all boat models and engines, so it's essential to ensure that it is the right fit for your specific boat before making a purchase.

3. Potential performance trade-offs: While the Slow Nut Nos. design aims to reduce noise and cavitation, it may also result in slightly reduced performance compared to standard propellers. Boaters looking for maximum speed may not find this propeller ideal.

The OMC 303479 Slow Nut Nos. is an attractive option for boaters seeking a quieter cruising experience while potentially improving fuel efficiency. However, it comes with a higher cost and potential performance trade-offs. Boaters should ensure that this propeller is compatible with their specific boat model and engine before making a purchase.

If reducing noise and potentially improving fuel efficiency are top priorities for your boating experience, the OMC 303479 Slow Nut Nos. could be an excellent investment. However, if maximum performance is a must-have, it may be worth considering a standard propeller instead. Ultimately, the decision depends on your individual boating needs and preferences.

part # 303479 prices

• $11.39-$22.41

specifications scowware:

• for makes: Omc
• manufacturer part number: 303479

general scowware:

• condition: New other see details
• Parts Accessories > Boat Parts > Deck Cabin Hardware

payments scowware:

• wallet: Paypal
• other
• credit card: Mastercard

offer scowware:

• options: Ship-to-home
• quantity: 2
• started: March 18, 2026
• availability: In Stock
• sold: 0
• best offers: True

shipping scowware:

• carrier: USPS, UPS
• transit: 4-9 Days
• cost: $0.00
• service: USPS Ground Advantage, USPS Priority Mail Flat Rate Envelope, UPS Next Day Air, UPS 2nd Day Air
• class: Standard, Expedited, One-day
• type: Calculated

returns scowware:

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

seller scowware:

• # reviews: 130430
• rating: 99.9%

Omc 303479 Is Similar To:

• Omc 398862 5032-398862-1 Knob And Screw Assembly Nos (42% similar) $7.88–$14.02. (January 6th, 2026)
• Omc 384306 90-2077 Thrust Washer Repair Kit Nos (36.8% similar) $6.00–$12.59. (January 7th, 2026)
• Omc 321318 Hood Latch Handle Nos (49.2% similar) $19.99–$23.98. (January 7th, 2026)
• Omc 103960 Washer Nos (52% similar) $8.58–$10.74. (January 7th, 2026)
• Omc 308293 Latch Handle Nos (46.4% similar) $8.95–$12.99. (January 7th, 2026)
• Omc 328169 Hex Nut Nos (62.7% similar) $7.99–$75.00. (January 7th, 2026)
• Omc 305585 11 Inch Bolt Nos (50% similar) $5.99–$12.99. (January 10th, 2026)
• Omc 313339 Nut Nos (63.8% similar) $8.99–$14.98. (January 11th, 2026)
• Omc 325792 Allen Screw Nos (50.9% similar) $11.46–$19.99. (January 12th, 2026)
• Omc 908373 New Screw Nos (52.8% similar) $10.12–$14.53. (January 12th, 2026)
• Omc 325525 Lock Spring Retainer Nos (50% similar) $6.99–$20.00. (January 15th, 2026)