SIERRA 18-7407-9 Ring Sterndrives 911700

( Brand: Sierra ), ( Manufacturer Part Number: 18-7407-9 ), ( Part Type: Ring Sterndrive )

Review SIERRA Replacement O ring Omc Sterndrives fits COBRA

Introducing the Sierra 18-7407-9 O-ring, specifically designed for use with OMC Cobra sterndrives. This essential marine component is an indispensable part of the sterndrive's sealing system, ensuring a watertight connection between various components.

The O-ring itself is made from a high-quality, durable, and resilient rubber material, capable of withstanding the rigors of marine environments. The rubber compound offers excellent resistance to UV radiation, ozone, oil, and fuel, ensuring a long service life.

Measuring 38.52531 inches (978.56 millimeters) in length and 0.25 inches (6.35 millimeters) in width, this O-ring is the perfect fit for the specified OMC Cobra sterndrive applications. Its cross-sectional profile is a standard "O" shape, allowing it to form a tight, flexible seal against mating surfaces.

The Sierra 18-7407-9 O-ring is designed to meet or exceed the requirements of marine OEMs and aftermarket applications. Its precision dimensions and high-quality rubber material assure a reliable and efficient seal in even the most challenging conditions.

When it comes to marine applications, reliability and durability are essential. With the Sierra 18-7407-9 O-ring, you can trust that your OMC Cobra sterndrive will perform optimally and maintain its watertight integrity. Whether you're an avid boater, a professional mariner, or a DIY enthusiast, this O-ring is the ideal choice for ensuring the continued reliability of your sterndrive system.

Pros and Cons of Buying a Sierra 18-7407-9 O-Ring for OMC Cobra Sterndrives

The Sierra 18-7407-9 o-ring is a crucial component for maintaining the performance and sealing of OMC Cobra sterndrives. This article will discuss the pros and cons of purchasing this o-ring to help boat owners make an informed decision.

1. High-Quality Material: The Sierra 18-7407-9 o-ring is manufactured using high-quality, durable rubber. This material ensures a long-lasting seal and resistance to wear and tear, reducing the need for frequent replacements.

2. Precise Fit: The o-ring is designed specifically for OMC Cobra sterndrives, ensuring a precise fit that minimizes leakage and maximizes efficiency.

3. Easy to Install: The o-ring is relatively simple to install, making it a cost-effective solution for boat owners who prefer to perform routine maintenance themselves.

4. Enhances Performance: A properly functioning o-ring contributes to the overall performance of the sterndrive by maintaining a tight seal and reducing water drag.

1. Cost: Replacing an o-ring can be an expensive repair, especially when considering the cost of labor if professional installation is required.

2. Availability: Depending on the location and availability, it may be challenging to find this specific o-ring, leading to potential delays in repairs.

3. Environmental Impact: The production and disposal of rubber o-rings contribute to the overall environmental impact of the boating industry.

The Sierra 18-7407-9 o-ring is an essential component for maintaining the performance and sealing of OMC Cobra sterndrives. While the cost and availability may be drawbacks, the benefits of a high-quality, precise fit and improved performance make it a worthwhile investment for boat owners.

If you own an OMC Cobra sterndrive and notice any signs of leakage, consider replacing the o-ring as soon as possible. Purchase the Sierra 18-7407-9 o-ring from a reputable supplier to ensure a quality product and consider performing the installation yourself to save on labor costs. Regularly checking and maintaining your o-rings can help extend the life of your sterndrive and prevent costly repairs in the future.

Details:

Condition: New. Related Part Numbers: 9117 778107, 3852531. Brand: Sierra. Part number 18-7407-9.

Replaces OEM OMC 9117 3852531, 778107, Sierra O-Ring, Pack of 5, This o-ring is for Sterndrives. MPN: 18-7407-9.

part #: 1874079 prices

• $12.08-$22.45

specifications otsterndriv:

• for models: Cobra
• for makes: Omc
• brand: Sierra
• mpn: 18-7407-9
• part type: Ring Sterndrive

payments otsterndriv:

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

shipping otsterndriv:

• transit: 3-7 Days
• service: Standard, USPS Priority Mail
• carrier: USPS
• type: Fixed
• class: Standard, Expedited
• cost: $0.00

seller otsterndriv:

• city: Green Bay, Wisconsin
• # reviews: 27723
• rating: 99.1%

offer otsterndriv:

• best offers: True
• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: August 4, 2025
• quantity: 1

general otsterndriv:

• Boat Parts > Sterndrive Motors Components > Other
• condition: New

returns otsterndriv:

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

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