My Account
Shopping Cart

Sierra 18-1284 Molded Intake Port Gasket OEM 355819

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

18-1284
07/13/2036 12:53 PM
Sale Price

$10.87

1 left at this price

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-1284 is a molded intake port gasket designed as a direct OEM replacement for marine engines. Engineered to Sierra's high-quality aftermarket standards, this gasket provides a reliable seal at the intake port interface, helping to prevent air and fuel leaks that can affect engine performance and efficiency.

Key Features:

  • OEM Replacement: Directly replaces OEM part number 355819
  • Molded Construction: Precision-molded design ensures consistent thickness and sealing surface for a leak-free fit
  • Marine-Grade Materials: Manufactured to withstand the demanding thermal cycling, moisture, and vibration conditions found in marine engine applications
  • OEM-Match Fit: Engineered to meet or exceed the specifications of the original equipment part it replaces
  • Sierra Quality: Backed by Sierra's extensive history as a trusted manufacturer of marine engine components

Sierra marine gaskets are a go-to choice for boat mechanics and DIY boaters alike, offering dependable performance and a proper fit right out of the box. Replaces OEM part number 355819.

Great so far

very easy to find my auto part and easy to pay ! thank you!

Great prices and item shipped quick!

Looking forward to having AC again!

Very easy website

Of 6 other vendors I'd found, every one listed the exact same price for the product. Autoplicity was well over 10% less. Although it's like an instinct for me to shop around & compare prices, I would expect that Autoplicity will be the hands down winner on any & all future purchases. I don't know how they do it...but who am I to question them saving me lots of money!!

Payment with Amazon is great!!

Fast shipment and really cheap price compare to other retail store will def recommend I purchase a K&N air filter for my YAMAHA R6 2007

Very good first experience with Autoplicity. Order arrived promptly. No issues.

Found what I wanted at a good price.

easy to order and fast response on shipping.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy