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Sierra 118-9253 Outboard Maintenance Kit Mercury V6 Optimax 3.0L 2-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

118-9253
06/02/2036 3:06 AM
Sale Price

$533.30

In Stock (5)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 118-9253 is a comprehensive, all-in-one outboard maintenance kit engineered specifically for Mercury V6 Optimax 3.0L 2-Stroke outboard engines with serial numbers 1B227000 and up (non-pro models). Designed to simplify routine service, this kit delivers everything needed for regular maintenance at appropriate service intervals — all in a single box.

Sierra Outboard Engine Maintenance Kits provide a one-box solution to keep Mercury outboard engines running at peak performance and reliability. Each kit arrives in a premium full-color Sierra branded box with labels featuring product photography and a complete list of box contents for easy identification.

Kit Includes:

  • High-quality spark plugs — pre-gapped and ready for installation
  • Water pump kit — specifically engineered for this Mercury V6 Optimax application
  • Thermostat — model-specific fit and function
  • Fuel filter — designed for optimal fuel system protection
  • Anode (Sierra P/N 18-6016A) — for corrosion protection

Each component in the Sierra 18-9253 maintenance kit meets or exceeds OEM specifications, making it a reliable and cost-effective alternative to purchasing individual parts separately. Ideal for scheduled seasonal service or annual overhaul of Mercury V6 Optimax 3.0L 2-stroke outboard motors.

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Product arrived on time at a fair price

Was good experience

Ordering was easy will see you on shipping

Still waiting for credit on 1 of the charges to my credit card. Only ordered 1 was charged for 3. One was removed but still waiting to see if charge for 3rd one taken off credit card. No response as yet

I think the shopping experience was great. Now we will see how the shipping experience is! Thank you. I wish we could&rsquo;ve had a coupon or a discount with this purchase. Maybe you could let us know if we can get one for this purchase?

Went well.

Good product and good price

Easy ordering process

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