OMC 987120 Sterndrive Upper Gearcase 3.0

( Manufacturer Part Number: 987120 ), ( Part Type: Sterndrive ), ( Country Of Origin: United States )

Review OMC Sterndrive 3.0 Upper Gearcase fits COBRA

Introducing the OMC 987120 Cobra Sterndrive 3.0 Upper Gearcase, a high-performance component engineered to deliver smooth, reliable operation for your watercraft. This upper gearcase is a crucial part of the sterndrive system, responsible for transmitting power from the engine to the drive shaft and propeller.

The OMC 987120 Cobra Sterndrive 3.0 Upper Gearcase is meticulously crafted using advanced materials and manufacturing techniques. The gearcase housing is made from high-strength composite material, providing exceptional durability and resistance to corrosion and impact. The gears are precision-machined from heat-treated steel, ensuring superior strength and longevity.

One of the standout features of this upper gearcase is its advanced sealing system. The triple-lip seal design provides an effective barrier against water intrusion, preventing damage to the engine and extending its life. The seal is also designed to be self-adjusting, ensuring a tight seal even as the gearcase wears over time.

The OMC 987120 Cobra Sterndrive 3.0 Upper Gearcase is also notable for its ease of installation and maintenance. The gearcase comes with a factory-installed, removable gearcase cover, making it simple to access the internal components for servicing. The cover is also designed to be securely fastened, preventing water from entering the gearcase during operation.

Additionally, this upper gearcase is compatible with a wide range of Cobra sterndrive models, making it a versatile choice for boat owners. It is also backed by the reputation of OMC, a leading manufacturer of marine propulsion systems, ensuring you can trust in its quality and performance.

In summary, the OMC 987120 Cobra Sterndrive 3.0 Upper Gearcase is a top-tier component designed for optimal performance, durability, and ease of maintenance. Its advanced materials, sealing system, and compatibility with various Cobra sterndrive models make it an excellent choice for boat owners seeking a reliable and efficient watercraft propulsion solution.

The OMC (Outboard Marine Corporation) 987120 Cobra Sterndrive 3.0 upper gearcase is a crucial component of the Cobra sterndrive system. This gearcase transfers power from the engine to the propeller, and its condition significantly affects the overall performance and efficiency of the boat. Let's explore some pros and cons of buying a rebuilt or aftermarket OMC 987120 Cobra Sterndrive 3.0 upper gearcase.

1. Cost-effective: Rebuilt or aftermarket gearcases are often more affordable than buying a new one directly from the manufacturer.

2. Availability: Aftermarket and rebuilt gearcases are more readily available compared to new ones, especially for older models.

3. Quick installation: Since these gearcases are often pre-assembled, installation time is typically shorter than with a new one.

4. Customizable: Aftermarket gearcases can be customized to meet specific performance requirements, such as higher horsepower or custom gearing.

1. Quality: The quality of aftermarket or rebuilt gearcases can vary greatly, and it's essential to ensure that the one you purchase is well-made and reliable.

2. Warranty: New OEM gearcases usually come with a manufacturer's warranty, while aftermarket or rebuilt gearcases may not have the same level of coverage.

3. Compatibility: Ensure that the aftermarket or rebuilt gearcase is compatible with your specific engine and boat model.

4. Performance: While some aftermarket or rebuilt gearcases offer improved performance, others may not meet the original equipment's performance levels.

In conclusion, the decision to buy a rebuilt or aftermarket OMC 987120 Cobra Sterndrive 3.0 upper gearcase depends on various factors, including your budget, performance requirements, and the specific application. To make an informed decision, ensure that you research the potential suppliers thoroughly and carefully evaluate the quality of the gearcase before making a purchase.

If you prioritize cost savings and quick availability, an aftermarket or rebuilt gearcase may be the best option for you. However, if you want the peace of mind that comes with a new OEM part and a manufacturer's warranty, consider purchasing a new gearcase directly from the manufacturer. Ultimately, it's essential to weigh the pros and cons carefully and choose the option that best suits your needs and budget.

Details:

Sold as-is no warranty. Condition: Used. Water pump impeller was not inspected and should be replaced prior to use. Oil was clean when drained.

Location: LU. Notes: Passed pressure test. OMC Cobra Sterndrive 3.0 Upper Gearcase 987120, Brand. Warranty: 30-Day Return Buyer Pays Shipping.

The gear ratio is 21:21 and are in good physical condition see photos.

part #: 987120 price

• $125.00

specifications otsterndriv:

• for models: Cobra
• for makes: Omc
• mpn: 987120
• part type: Sterndrive
• country of origin: United States

seller otsterndriv:

• city: New Richland, Minnesota
• # reviews: 11292
• rating: 100.0%

payments otsterndriv:

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

returns otsterndriv:

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

offer otsterndriv:

• started: February 15, 2026
• options: Ship-to-home
• quantity: 1
• sold: 0
• availability: In Stock

shipping otsterndriv:

• carrier: UPS
• service: UPS Ground
• class: Standard
• transit: 4-6 Days
• cost: $75.00
• type: Fixed

general otsterndriv:

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

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