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Sierra 18-2771 OMC Cobra Bellows Kit Without Cone Clutch

Manufacturer

Sierra

<p>For nearly six decades, Sierra has established itself as one of the marine industry's most trusted names in aftermarket engine and drive parts. Founded as a specialized marine parts manufacturer, Sierra has grown into a comprehensive supplier of replacement components, instrumentation, and accessories for both recreational and commercial boating applications. Operating from their 300,000-square-foot distribution center in Litchfield, Illinois, Sierra serves boat owners and marine technicians worldwide with an extensive catalog of parts engineered specifically for the harsh saltwater environment.</p><h3>Marine Engine Excellence</h3><p>Sierra's reputation was built on delivering precision-engineered internal engine components and drive system parts that meet or exceed OEM specifications. Their <a href="/7570-sierra-engine-gasket-set-5404">engine gasket sets</a> provide critical sealing solutions for inboard and outboard motors, while their <a href="/7570-sierra-engine-complete-assembly-15341">engine complete assemblies</a> offer comprehensive replacement options for major overhauls. Each component undergoes rigorous testing to ensure reliability in demanding marine conditions, from corrosion resistance to temperature cycling performance.</p><h3>Instrumentation and Monitoring Systems</h3><p>Accurate instrumentation is essential for boat operators to monitor engine health and prevent costly breakdowns on the water. Sierra's comprehensive line of <a href="/7570-sierra-gauges-200483">gauges</a> includes everything from fuel pressure and temperature indicators to voltmeters and trim gauges, all designed with marine-grade materials that withstand vibration, moisture, and UV exposure. Their <a href="/7570-sierra-tachometer-gauge-1488">tachometer gauges</a> deliver precise RPM readings critical for optimizing engine performance and fuel efficiency. Supporting these instruments, Sierra's <a href="/7570-sierra-gauge-resistor-47908">gauge resistors</a> ensure proper signal conditioning and accurate readings across various sensor types and engine configurations.</p><h3>Expanded Product Portfolio</h3><p>In 2022, Sierra significantly broadened its scope beyond traditional marine engine parts to encompass a wider range of boating accessories and even outdoor power equipment components. This strategic expansion brought established marine brands like Shields and Moeller under the Sierra umbrella, creating a one-stop resource for marine maintenance and replacement parts. The company now offers fuel systems, electrical components, battery charging solutions, and NMEA electronics alongside their traditional engine parts lineup.</p><h3>Quality Backed by Industry-Leading Warranties</h3><p>What sets Sierra apart in the crowded aftermarket marine parts market is their commitment to standing behind every component they manufacture. Their warranty coverage extends beyond simple part replacement—it includes shop labor, haul-out fees, towing charges, and related incidental costs should a warrantied part fail. This comprehensive protection reflects the company's confidence in their manufacturing processes and quality control standards. For boat owners facing repairs far from shore or mechanics working on customer vessels, this peace of mind is invaluable. Whether you're maintaining an outboard motor, rebuilding an inboard engine, or upgrading your boat's instrumentation, Sierra's decades of marine industry experience and commitment to quality make them a reliable choice for keeping your vessel running at peak performance.</p>

Part Number

18-2771
05/31/2036 6:42 PM
Sale Price

$198.09

In Stock (10+)

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Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-2771 is a complete transom service bellows kit designed specifically for OMC Cobra stern drives without cone clutch. This comprehensive kit contains all the essential components needed for a complete bellows replacement and transom seal service, helping prevent sterndrive failure and maintain optimal boat handling.

Complete Kit Includes:

  • Exhaust bellows (18-2764)
  • U-joint bellows (18-2765)
  • Shift cable bellows (18-2763)
  • Heavy-duty gimbal bearing (18-2100)
  • Outdrive gasket set (18-2613)
  • Hose clamps

Interchangeable With: GLM 21962, Mallory 9-72930, OMC 3854270, OMC 3858631, Volvo Penta 3854270, Volvo Penta 3858631

Sierra products are engineered to meet or exceed OEM specifications and are built to withstand harsh marine environments. Each component in this kit is manufactured to exacting standards for reliable, long-lasting performance.

Products specifications

Replaces

3854270

Product information was accurate and as advertised.

It was easy

great service , will use again

Great customer service however the merchandise I ordered was damaged which was a great inconvenience ☹️.

Great

So far so good

Easy ordering

Site is nice, wish it had more filtering options, for instance, front brakes only, or rear rotors, etc.

prices are definitely cheaper than everyone else for the part I ordered. Arrived very quickly also.

Talked on the phone first and they were very helpful. Website was very easy to use.

Great

Easy on-line order..

First time buyer

Easy order. Fast shipping.

Easy order. Fast shipping.

Quick and easy.

Very nice service

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