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Arco Starting & Charging SW945 Marine Starter Solenoid for Yamaha Mercury Outboards

Manufacturer

Arco Starting & Charging

<h3>ARCO Starting &amp; Charging: The Marine Industry&apos;s Gold Standard</h3><p>When a boater turns the key and nothing happens miles from the dock, the name they wish they had trusted is <strong>ARCO Marine</strong>. For more than six decades, ARCO Starting &amp; Charging has been the benchmark for dependable marine engine electrical components — building and testing every unit at their facility in Pensacola, Florida to ensure each part meets or exceeds original equipment manufacturer (OEM) specifications before it ever reaches a customer.</p><p>Founded in 1960, ARCO set out with a straightforward mission: deliver peace of mind to boat owners and marine technicians through products they can rely on. That philosophy hasn&apos;t changed. Every component ARCO manufactures — from outboard <a href="/7236-arco-starting-charging-starter-motor-4152">starter motors</a> to high-output alternators — is rigorously load-tested beyond normal operating conditions. It&apos;s the kind of commitment that has made ARCO the trusted choice of professional marine service technicians and weekend boaters alike for generations.</p><h3>Purpose-Built for the Harshest Marine Environments</h3><p>Saltwater, humidity, and vibration are relentless adversaries for any electrical component. ARCO engineers their products specifically for these conditions. Their <a href="/7236-arco-starting-charging-tilttrim-motors-201071">tilt/trim motors</a> and <a href="/7236-arco-starting-charging-trim-and-tilt-units-201108">trim and tilt units</a> are designed to perform reliably through years of saltwater exposure, while their <a href="/7236-arco-starting-charging-alternators-200087">alternators</a> — including the advanced Zeus High Output Alternator line — are purpose-built to charge modern battery banks faster and handle the electrical demands of today&apos;s feature-rich vessels. ARCO makes OEM replacement parts compatible with leading engine manufacturers including Mercury, Yamaha, Volvo Penta, MerCruiser, Honda, Evinrude, Suzuki, and many others, making cross-referencing straightforward for technicians and DIYers alike.</p><h3>Innovation with the Zeus High Energy Platform</h3><p>ARCO&apos;s Zeus line represents the brand&apos;s push into next-generation marine charging technology. Zeus High Output Alternators and Bluetooth-enabled voltage regulators are engineered for multi-voltage compatibility and rated IP68 for protection against water intrusion — a critical specification in marine applications. The Zeus ecosystem is purpose-built to support lithium battery banks, high-draw accessories, and demanding live-aboard or commercial use cases where consistent power output is non-negotiable.</p><h3>OEM Quality, Factory Warranty, American-Made</h3><p>ARCO backs their entire rotating electric parts lineup — including their <a href="/7236-arco-starting-charging-starters-inboard-201008">inboard starters</a> — with the ARCO Assurance warranty program, offering coverage against defects in materials and workmanship. Manufacturing, quality testing, warehousing, and fulfillment all take place in the United States, giving buyers confidence in consistent quality control from start to finish. For anyone maintaining a vessel and unwilling to compromise on reliability, ARCO Starting &amp; Charging remains the definitive choice in marine engine electrical components.</p>

Part Number

SW945
09/12/2036 11:22 AM
Sale Price

$82.97

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Arco Starting & Charging SW945 is a premium-quality replacement starter solenoid designed for Yamaha 2-stroke and 4-stroke outboard engines, as well as Mercury 4-stroke outboards. This 12-volt marine-grade solenoid features a 4-terminal design with copper contact material for reliable electrical conductivity and intermittent duty cycle operation.

Key Features:

  • Original equipment quality replacement manufactured by Arco Marine in Pensacola, Florida
  • Over-engineered to exceed OEM standards and outlast original equipment
  • Premium input components tested prior to shipping for lowest failure rates in the industry
  • Designed for harsh marine environments with reliable starting performance
  • Direct replacement for multiple OEM applications

Replaces OEM Part Numbers:

  • Yamaha: 6G1-81940-00-00, 6G1-81941-10-00, 6G1-8194A-10-00
  • Mercury: 825096T01, 89-825096, 89-825096T
  • Sierra: 18-5821
  • Mallory: 9-15121, 9-15203

Backed by Arco Marine's reputation for quality since 1960, this starter solenoid provides dependable performance for your marine engine's electrical starting system.

Products specifications

Replaces

Yamaha 6G1-81941-10 Mercury 825096, 825096T01

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