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Sierra 18-0549 Plug Off Cap for OMC V-8 Stern Drives

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

18-0549
06/01/2036 4:47 AM
Sale Price

$11.92

In Stock (10+)

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Usually delivered within 2 days

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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 18-0549 is a replacement plug off cap designed for OMC V-8 stern drive and inboard engine applications from 1997 and newer. This essential cooling system component provides a reliable seal to close off unused ports in the engine cooling circuit.

Key Features:

  • 1-inch inner diameter for proper fit on OMC V-8 engines
  • Durable black rubber construction resists heat and coolant exposure
  • Direct replacement for OMC part number 909829
  • Compatible with 1997 and newer OMC V-8 stern drive and inboard models
  • Single cap per package

Sierra Marine is a trusted manufacturer of aftermarket marine engine parts, offering OEM-quality components at competitive prices. This plug off cap meets or exceeds original equipment specifications for reliable performance and long service life.

Great prices! Couldn't find anyone else even close.

I have dealt with them twice so far and they have been great both times. Price can't be beat and you can get someone on the phone nearly every time you call. Shipping is reasonable and fairly quick. I will definitely shop here again.

Prompt and quick service... no hassle...

good job

Excellent

Awesome prices always deliver on time !!

Very happy with the speed of shipping and with the reasonable price of the product.

Fast Easy and backed by Amazon What could be better

The cheapest price on the net and very fast shipping. I received my items in 3 days and they were delivered on a Saturday to make things even better. <br><br>Will be using these guys again real soon.

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Good so far

You cannot beat the price for the LS2 fuel rail kit. Cost less and comes with more parts that the other kits that just give you rails. <br><br>Ordered on a Sunday and shipped FedEx by Monday. <br><br>Order # 14169<br>

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