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Sierra 18-5250 Ignition Tune Up Kit for Delco 4 & 6 Cylinder Marine Engines

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

18-5250
06/01/2036 9:13 AM
Sale Price

$22.39

In Stock (10+)

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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 18-5250 is a complete ignition tune-up kit designed for GM in-line 4 and 6 cylinder marine engines equipped with conventional Delco ignition systems. This comprehensive kit includes all essential components needed to restore optimal ignition performance and ensure reliable engine operation.

Kit Includes:

  • Contact Set (Sierra 18-5311)
  • Condenser (Sierra 18-5345)
  • Rotor for 4 and 6 cylinder applications (Sierra 18-5418)

Key Features:

  • Precision-engineered components built to OEM specifications
  • Compatible with Chris-Craft, Crusader, and MerCruiser inboard and sterndrive applications
  • Fits GM 153, 181, 194, 230, 250, and 292 cubic inch displacement engines
  • Designed for straightforward installation for DIY enthusiasts and professional mechanics
  • Helps restore proper ignition timing, improve fuel efficiency, and reduce starting issues

Replaces OEM Part Numbers:

  • MerCruiser: 34235T1, 34235Q1
  • OMC: 172527, 0176371, 5006182
  • Johnson/Evinrude: 172527
  • Mallory: 9-29300
  • GLM: 72610
  • CDI: E66-0021

Regular ignition system maintenance with quality components like the Sierra 18-5250 kit promotes engine longevity, maintains peak performance, and provides dependable starting in all conditions. For complete ignition service, use with Sierra distributor caps 18-5385 or 18-5386.

Products specifications

Application

4 & 6 cyl. Delco

Includes

5311 (1): Contact Set, 5345 (1): Condenser, 5418 (1): Rotor

Replaces

172527

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So far so good.

Quick and easy. Could have left or right side in description though. Other than that 1 phone call cleared up the left and right confusion and placed my order. Great service. I even used again for my rear Lateral arms I just purchased

No ordering issue. Good shipping price product arrived on time and correct, will use again.

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