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Sierra MP52000 Magneto Ignition Switch 3-Position Off-Run-Start Push-to-Choke

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

MP52000
05/31/2036 6:42 PM
Sale Price

$41.94

3 left at this price

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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 MP52000 is a heavy-duty magneto ignition switch designed for marine applications requiring reliable off-run-start functionality with integrated push-to-choke capability. Constructed from marine-grade glass-filled polyester, this switch delivers exceptional impact and corrosion resistance for years of dependable service in harsh marine environments.

Key Features:

  • Three-position operation: Off-Run-Start with push-to-choke function
  • Marine-grade glass-filled polyester construction for maximum corrosion protection
  • Six color-coded wire leads match Mercury Marine factory color codes for simplified installation
  • Fits standard 7/8" diameter mounting hole with maximum 5/8" panel thickness
  • Heavy-duty potted construction eliminates moisture intrusion
  • Inner seal between cylinder lock and contact plate prevents corrosion
  • Non-conductive housing eliminates potential electrical shorts
  • Includes two umbrella-type keys with different key codes for added security
  • Hex black plastic face nut and plastic backup nut included

Electrical Ratings:

  • Ignition: 15A @ 12V DC
  • Solenoid: 30A @ 12V DC
  • Choke: 7A @ 12V DC

This switch serves as an exact OEM replacement for Mercury Marine and Mercury Sport Jet part number 87-88107A5. The minimal bleed per circuit design ensures reliable electrical performance, while the potted terminal construction provides superior protection against the marine environment. Ideal for boats equipped with Mercury outboards requiring magneto ignition control with choke functionality.

Products specifications

Type

Switches

Purchased Borg Warner Turbo 12709095019. Best pricing on the web and fast shipping.

The only downside was that the part wasn't correct for the application, otherwise there's absolutely no complaint.

good experience!

Easy

You say it is in stock. Great if it is.

The shopping experience was great! I ordered an incorrect part.. that's my fault.

This is my first order with you , so I will see how it goes.

Great

Fast shipping, great product. Nothing more needs to be said.

Great Prices, and based on the reviews I hope the shipping is as fast as everyone says.

Item shipped 5 days after order was placed. Worth the wait for the great price however. Order Number: 18722

Will continue to shop Autoplicity

Great prices and quick shipping.

Great prices and service. Quality parts for the best price online. Will be my first choice form now on.

I ordered my Auto Vent Shade bug deflector 18174 on Thursday afternoon, June 14, 2012, and had it on my front porch by Tuesday, June 19, 2012. I thought that was fast shipping, especially considering there was a weekend involved. The price was also very reasonable. I am anxious to install my new bug deflector. I will be turning to Autoplicity in the future for my auto needs. Great Job Autoplicity!

Great Price and Fast Shipping

Even though I checked the 20offshipping it did not apply it at checkout.

Great prices with friendly customer service what more could you ask for

Had an error first time i ordered. Went smoothly next time.

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