My Account
Shopping Cart

Sierra 18-7844 Water Separating Fuel Filter Short 21 Micron

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

18-7844
06/01/2036 1:58 PM
Sale Price

$16.26

In Stock (10+)

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 18-7844 is a high-performance water separating fuel filter designed specifically for fuel-injected marine engines. This short-style filter provides reliable fuel filtration and water separation to protect your engine from contaminants and moisture that can cause poor performance and component damage.

Key Features:

  • 21 micron filtration element effectively removes dirt, debris, and particulates from fuel
  • 90 GPH (gallons per hour) flow capacity suitable for high-performance applications
  • Integrated water separation technology removes moisture from fuel before it reaches the engine
  • 11/16 inch -16 threaded inlet connection for secure, leak-free installation
  • Compact short filter design at 3.875 inches in height fits tight engine compartments
  • Direct replacement for Mercruiser stern drive and Mercury Marine engines

This fuel filter is engineered to meet the demanding requirements of marine fuel-injected engines, where clean, dry fuel is critical for optimal performance, fuel economy, and engine longevity. Regular replacement of your fuel filter as part of routine maintenance helps prevent fuel system issues and costly repairs.

Specifications:

  • Filter Height: 3.875 inches
  • Micron Rating: 21 micron
  • Flow Rate: 90 GPH
  • Inlet Size: 11/16 inch -16 thread
  • Style: Short filter with water separator

Products specifications

Microns

21

Replaces

Mercury - 35-807172, 35-802893Q

Type

Short - 3.875"

It was fast and easy thank you

Autoplicity had the best price on the item i wanted and also has a large selection to choose from. And they also responded quickly to a question that i had asked

I registered &amp; was confirmed, but my sign if password doesn't work. Had to use Amazon to get in to shop.

how long will it take to arrive?

fine so far

Quick and easy check out. Good prices

Quick and Easy!

Quick and easy. Takes PayPal

Always the best possible price!

They are excellent. They were able to send out my item as early as the next day. I am anticipating my product by early next week. Great!

Ease to pay with Amazon was great.

Every thing is very good so far.

thank you!

Fast, easy, Awesome.

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