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Sierra 18-9859 Puller Head Upper Swivel Shaft Removal Tool for MerCruiser Sterndrive

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

18-9859
08/05/2036 12:58 AM
Sale Price

$40.61

1 left at this price

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-9859 Puller Head is a specialized marine service tool designed to remove the upper swivel shaft from MerCruiser sterndrive gimbal rings. This tool is a direct aftermarket replacement for Mercury Marine OEM part number 91-63616, providing professional-grade performance at a competitive price.

Proper sterndrive servicing requires the right tools, and the Sierra 18-9859 ensures the upper swivel shaft can be extracted cleanly and efficiently without damage to surrounding components. It is commonly used during gimbal ring rebuilds and sterndrive transom assembly service procedures.

Compatible Gimbal Rings:

  • MC-I
  • R-MR
  • Alpha One
  • Alpha One / Gen II
  • Bravo One
  • Bravo Two
  • Bravo Three
  • Blackhawk

Key Details:

  • Removes the upper swivel shaft from MerCruiser sterndrive gimbal rings
  • Direct replacement for Mercury Marine OEM tool 91-63616
  • Part of Sierra's comprehensive sterndrive service tool lineup
  • Designed for professional marine technicians and serious DIY boaters

Sierra International is a leading manufacturer of aftermarket marine parts and tools, with products engineered to meet or exceed OEM specifications. The 18-9859 Puller Head is also available as a component of Sierra's complete MerCruiser sterndrive tool packages.

The site is pretty easy to use, and the prices are GREAT

Easy to order. Further assessment will be made upon arrival of steps.

fast and easy

Lowest prices. Never got at tracking number even after calling. Seat showed up in a week so not bad. Stock pic is slightly different. The vinyl is the same color as the other materials. Still a nice looking seat. A shade or 2 darker than a peanut brown color.

so far so good and a good price

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