My Account
Shopping Cart

Sierra 18-9786 Lower Unit Fill Tube for Small Gearcases

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

18-9786
07/12/2036 9:00 PM
Sale Price

$24.84

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 18-9786 Lower Unit Fill Tube is a flush and fill tool designed specifically for small marine gearcases that require a 10 oz. tube-packaged gear lube. Engineered for easy DIY maintenance, this tool simplifies the process of draining and refilling your outboard or sterndrive lower unit at home without the need for professional service.

Key Features:

  • Designed for use with 10 oz. squeeze tube gear lube packages
  • Includes a lower unit fitting appropriate for specific gearcase applications
  • Simplifies flush-and-fill service on small marine gearcases
  • Ideal for do-it-yourself home maintenance
  • Clamshell packaged for convenient retail display and storage

The Sierra 18-9786 is also sold as a component of the Sierra 18-9600-9 Gear Lube Kit, which bundles this fill tube with two 10 oz. tubes of Sierra Premium Lower Unit Gear Lube. Compatible with Sierra MPN 18-9600-0 (10 oz. tube gear lube). Trust Sierra — a leading manufacturer of aftermarket marine engine and drive parts — for reliable, straightforward maintenance tooling.

After researching and finding the bumper I wanted, I spent some time looking for the best price. Autoplicity was not only the best price the beat the competitors by a 100 dollars. Big Savings.

I have been looking for this item for a long time.

price seems okay . .

Fast, easy and very competitive prices. The customer service was very good with a quick and helpful response. I will shop here again!

Good

I love you

The site showed items in stock, I hope that was accurate

Great so far.

Had the lowest price around for a Thule 9025 bike rack. Shipping was also fast and inexpensive. I will be sure to use them again for future purchases. Order #9806 4/15/12

Great and Easy to Use Website

was fast

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