Sierra MP41040 ignition switch front view showing a reliable 4-position control for marine engines
Sierra MP41040 ignition switch terminal area displaying four screw tabs for quick wiring
Sierra MP41040 ignition switch front view showing a reliable 4-position control for marine engines
Sierra MP41040 ignition switch terminal area displaying four screw tabs for quick wiring

Sierra MP41040 Ignition Switch - 4-Position, Universal Fit

Sierra MP41040 ignition switch is engineered for today’s high horsepower marine engines and the harsh realities of...
Vendor: Sierra
Availability: In stock
£44.03
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Sierra MP41040 ignition switch front view showing a reliable 4-position control for marine engines

Sierra MP41040 Ignition Switch - 4-Position, Universal Fit

£44.03
Sierra MP41040 ignition switch front view showing a reliable 4-position control for marine engines
Sierra MP41040 ignition switch terminal area displaying four screw tabs for quick wiring

Sierra MP41040 Ignition Switch - 4-Position, Universal Fit

£44.03
Description
Description
x

Sierra MP41040 ignition switch is engineered for today’s high horsepower marine engines and the harsh realities of salt spray, vibration, and heat on deck. This 4-position conventional switch aligns with OEM specifications and delivers reliable control in a compact, easy-to-install package. It’s a practical replacement option for maintenance and upgrades, helping you preserve dashboard aesthetics and consistent starting performance without overpromising results.

Marine environments demand rugged hardware. Sierra designs this switch to withstand exposure to sun, salt, and engine heat while maintaining precise actuation and clear labeling. The result is a dependable control point that’s simple to operate in challenging conditions, whether you’re navigating choppy seas or docking at dusk.

Key specifications

  • Hole size: 7/8 inch
  • Length: short 1-1/8 inch maximum panel thickness
  • Rated: 15 Amp @ 12 VDC
  • Terminal type: 4 Screw Tab
  • Fit type: Universal Fit
  • Backup nut: brass
  • Face nut: knurled black plastic

Why it matters

  • Meets or exceeds the original equipment part it replaces, offering OEM-like compatibility for a wide range of boats.
  • Universal fit and compact dimensions simplify installation on diverse dash layouts.
  • Brass backup nut and knurled plastic face nut contribute to a sturdy, corrosion-resistant assembly.
  • 4-screw terminal layout provides a straightforward wiring process for reliable electrical connections.

Warranty and support

Sierra backs its products with an industry-leading warranty. Coverage includes posted shop labor, haul-out and towing fees, and related incidental charges when applicable.

Whether replacing a worn switch or upgrading to a dependable control, the MP41040 offers practical flexibility, clear labeling, and robust build for real-world marine use—appealing to DIY installers and professional technicians alike without making guarantees, but with clear possibilities for improved reliability and ease of maintenance.

FAQ

Q: Is the Sierra MP41040 ignition switch compatible with most marine panels?

A: Yes. It features a universal fit with a 7/8 inch hole and a short 1-1/8 inch length suitable for many panel thicknesses.

Q: What warranty does the MP41040 include?

A: Sierra’s industry-leading warranty covers posted shop labor, haul-out and towing fees, and related incidental charges.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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