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Sierra 18-3199 Starboard Water Pickup for MerCruiser MR/Alpha I Stern Drive

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

18-3199
08/09/2036 9:45 AM
Sale Price

$5.00

3 left at this price

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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 18-3199 is a starboard-side water pickup designed as a direct replacement for MerCruiser MR and Alpha I stern drives. Built to meet or exceed original equipment specifications, this Sierra marine part ensures reliable raw water flow to the engine cooling system — a critical component for preventing overheating in sterndrive applications.

Key Features:

  • Starboard (right-side) water pickup for MerCruiser stern drives
  • Meets or exceeds OEM specifications for fit, form, and function
  • Compatible with MerCruiser R, MR, and Alpha One stern drives (1983–1991)
  • Serial number range: Sterndrive s/n 6225577 thru 0D469858; Transom Assembly s/n 6216687 thru 0D469858
  • Sold individually — one starboard water pickup per package

OEM Cross-References:

  • Mercruiser OEM: 93423, 934231, 934233
  • Mallory: 9-78115
  • GLM: 21870

Sierra has been a trusted name in marine replacement parts for decades, engineering components that match the quality and durability of original manufacturer parts. The 18-3199 is an economical, reliable solution for maintaining proper cooling system performance on your MerCruiser-powered vessel.

easy site to navigate

Very quick ordering, however I was unable to use the PayPal function.

so quick &amp; easy thank you

Easy to navigate, found what I was looking for. Will definitely be back for more.

Great site! Order arrived quickly and in great condition!

When I get my product I will comment

its ok

Great experience! !!!

Awesome price! Shipping could be faster, but it was fast enough. Will deff buy again.

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Pleasant

Had difficult to find parts.

Excellent and very quick service. I could not find this product in stock from any other supplier so I kept hunting. I found Autoplicity and from now on they are the first company I will try. Thank you.

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