My Account
Shopping Cart

Sierra MP39700-1 4-Position Conventional Marine Ignition Switch

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

MP39700-1
08/05/2036 2:44 PM
Sale Price

$31.03

1 left at this price

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra MP39700-1 is a 4-position conventional marine ignition switch built to deliver reliable starting and accessory control in demanding marine environments. Engineered with maximum corrosion protection, this switch is an ideal direct replacement for worn or failed ignition switches on a wide range of marine applications.

Key Features:

  • 4 switch positions: Accessory – Off – Run – Start
  • Non-conductive marine-grade glass-filled polyester housing eliminates potential shorts
  • Inner seal between cylinder lock and contact plate for added moisture protection
  • Maximum corrosion protection to eliminate oxidation in harsh saltwater and freshwater environments
  • Brass backup nut for secure, long-lasting panel mounting
  • Knurled black chrome face nut with rubber cap for a clean, finished appearance
  • 4 screw-tab terminals for straightforward wiring connections
  • Fits standard 7/8" panel cutout
  • Accommodates panels up to 1-1/8" thick (long length)

Electrical Ratings:

  • Ignition Rating: 15 Amp @ 12V DC
  • Solenoid Rating: 30 Amp @ 12V DC
  • Accessory Rating: 15 Amp @ 12V DC

The Sierra MP39700-1 marine ignition switch is manufactured to meet or exceed OEM specifications, ensuring a dependable fit and long service life. Whether replacing an aging switch on a powerboat, pontoon, or other watercraft, this switch delivers the quality and durability that Sierra Marine is known for.

NO PROBLEMS, VERY NICE WEBSITE

good price

awsome

It was fine.

Experience went well and the proof will be in what's in the package after it's opened.

Looking forward to getting these parts. Thanks.

Great price on a hard to find part.

Best price I found on Weathertech digifit floor mats for my 2012 F150 Supercrew. Product was as described and shipping was fast too.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy