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Sierra 118-9250 Outboard Maintenance Kit Mercury 350-400 HP Verado 6-Cyl 4-Stroke

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

118-9250
06/02/2036 3:06 AM
Sale Price

$523.43

4 left at this price

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Usually delivered within 2 days

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FREE SHIPPING

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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 18-9250 Outboard Maintenance Kit is a comprehensive, all-in-one service solution designed for Mercury 350–400 HP, 6-Cylinder, 4-Stroke Verado outboard engines with serial numbers 2B141617 and up. This single-box kit takes the guesswork out of routine engine maintenance by bundling every essential service component together, ensuring peak performance and long-term reliability.

Key Features:

  • Complete one-box maintenance solution — everything needed for regular service intervals in a single kit
  • High-quality spark plugs included, pre-gapped and ready for installation
  • Water pump impeller engineered specifically for this engine family
  • Fuel filter for consistent, clean fuel delivery
  • Anodes and anode mounting hardware included to protect against corrosion
  • All components meet or exceed OEM specifications

Kit Contents:

  • Spark Plugs (pre-gapped)
  • Anode | Sierra 18-6011A
  • Anode | Sierra 18-6016A
  • Fuel Filter | Sierra 18-7718
  • Impeller | Sierra 18-3056
  • Anode Mounting Bolt | Sierra 18-6245

Sierra has been a trusted name in marine aftermarket parts for over 58 years. The 18-9250 kit is packaged in a premium Sierra-branded box with full-color labeling that includes product photography and complete contents information, making it easy to verify you have everything needed before you start. Keeping your Mercury Verado properly serviced at recommended intervals helps protect your engine investment and ensures reliable, worry-free time on the water.

Easypeezy a pleasure to do business with you

Good pricing, product and shipping. A++

Easy to use website and check out process

FedEx shipping was iffy but that's not your fault. Assembly instructions or at least an exploded diagram of all the piece parts of the cover kit would have been helpful.

Good if it arrives as promised

Easy transaction!

THM had the correct bearing at a good price and delivery was prompt.

Easy purchase system

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