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Sierra MP40970-1 Emergency Engine Cut Off Switch & Lanyard

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

MP40970-1
06/01/2036 6:03 AM
Sale Price

$23.07

In Stock (10+)

delivery box

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 MP40970-1 Emergency Engine Cut Off Switch & Lanyard is a critical safety device designed for retrofitting older boats that lack this essential feature. This kill switch system provides instant engine shutdown capability by simply pulling the lanyard, effectively preventing dangerous runaway boat situations.

Key Features:

  • Universal emergency cut-off switch for marine engines
  • Instant engine shutdown when lanyard is pulled
  • Includes coiled safety lanyard for operator attachment
  • Complete installation kit with all necessary mounting hardware
  • Fully illustrated installation instructions included
  • Ideal safety upgrade for older boats without factory kill switches

This retrofit kit helps bring older vessels up to modern safety standards, ensuring the engine stops immediately if the operator is thrown from the helm. Essential safety equipment for responsible boating.

Products specifications

Length

1/4 Inch Max Panel Thickness

Type

Emergency Cut-Off

Voltage

12V DC

Warranty Details

Limited Lifetime

The parts that I order was right and was shipped out at a reasonable speed.

found the part I was looking for.reasonable price.

good

Quick delivery and correct parts Good service

ez to use this site! Thank you!

Ordered the Perrin Reverse Lockout Lever for my 2008 Subaru Legacy GT Spec.B. Order came in a reasonable amount of time. Found it to be the most inexpensive on Autoplicity.

Very simple and easy. Just waiting on my part to arrive now.

Best price to be found, no ridiculous shipping costs.

Order process was fast

So far, so good. Found my part fairly easy and is was half the price of the auto parts stores around me!

east to find. exactly what i need

Billing/shipping db is a little quirky.

You guys are the only ones who had my part in stock. The shipping was quick and I was very happy with the condition of the bell housing that I ordered i would order from them again.

easy ordering

Best prices I found online.. processed same day and recieved same week..packaged great and works great.

The item has not been delivered yet. But the email updates are great. And I found this much cheaper than elsewere.

Easy

Had what I wanted, and shipped it quickly! Can't wait to install my bumper cover tomorrow!

Best price and super fast shipping. Only issue was that their online order status system was really far behind! The system said my order was "pending" and it had been shipped. Later it said "processing" and it was on my doorstep. Not a big deal and certainly better than the opposite (they tell you something has happened when it hasn't) and doesn't keep them from being a 5 star seller in my book.

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