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Sierra 18-0677-1-9 Exhaust Riser to Manifold Gasket - Pack of 2

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

18-0677-1-9
08/07/2036 5:00 AM
Sale Price

$12.48

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-0677-1-9 is a marine exhaust riser to manifold gasket set designed to maintain a reliable seal between the exhaust riser and manifold on PCM Ford and PCM GM small block inboard engines. Sold as a pack of two gaskets, this set meets or exceeds original equipment manufacturer specifications to ensure long-lasting performance in demanding marine environments.

Proper riser gaskets are critical to separating the exhaust and cooling water passages. When installing, orient the blocked water passage toward the exhaust outlet (rear of the riser) and the open end toward the front — this ensures adequate water flow over the top of the riser and helps prevent exhaust hose damage from heat.

Key Features:

  • Pack of 2 gaskets — ideal for a complete port and starboard replacement
  • Compatible with both 3" and 3.5" exhaust risers
  • Engineered to meet or exceed OEM specifications
  • Direct replacement for Pleasurecraft Marine RM0002
  • For use with Sierra 18-1899 risers and 18-1996 manifolds

Replaces / Cross-Reference Part Numbers:

  • Pleasurecraft Marine: RM0002
  • Sierra: 18-0677, 18-0677-1
  • Osco: M0002
  • GLM: 33500
  • Mallory: 9-65700

Very easy ordering process, and shipping was super fast.

Nice and easy to look for part

no issues

Very nice! Definitely good place to shop...

Great service

The product is for a reasonable price

That was easy

Quick and easy ordering. Good price as well.

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