Sierra MP41030 Marine Ignition Switch, 3-Position Off-Run-Start

The Sierra MP41030 is a 3-position Off-Run-Start ignition switch built for panel mounting on boats and other marine applications. The switch body is constructed of polyester, and wiring connects via 3 screw tab terminals for a secure, corrosion-resistant electrical connection. A brass back up nut secures the switch to the panel, while the knurled black plastic face nut with a rubber cap protects the switch cylinder from spray and moisture.

The MP41030 is rated for 15 Amps at 12 Volts DC on the ignition circuit and 30 Amps at 12 Volts DC on the solenoid circuit, making it suitable for standard 12-volt marine ignition and starting circuits. It mounts through a 7/8 inch hole and is designed for panels up to 5/8 inch maximum thickness. This is a universal-fit switch, so it is not tied to a specific engine make or model, and installs anywhere a compatible Off-Run-Start ignition switch is required.

Specifications

• Brand: Sierra
• Manufacturer Part Number: MP41030
• Switch Type: Ignition Switch, 3-Position Off-Run-Start
• Material: Polyester
• Terminal Type: 3 Screw Tab
• Back Up Nut: Brass
• Face Nut: Knurled black plastic with rubber cap
• Color: White
• Mounting Hole Size: 7/8 inch
• Maximum Panel Thickness: 5/8 inch
• Ignition Rating: 15 Amps at 12 Volts DC
• Solenoid Rating: 30 Amps at 12 Volts DC
• Number of Positions: 3
• Weight: 0.26 pounds
• UPC: 808282367725

Fitment

Universal fit; not limited to a specific engine make, model, or year range.

Replaces (OEM)

No OEM cross-reference numbers are listed for the Sierra MP41030.

Frequently Asked Questions

What does the Off-Run-Start designation mean on the MP41030? It means the Sierra MP41030 has three switch positions: Off, Run, and Start, covering the standard cycle for turning on accessories, running the engine, and cranking it over.

What amperage is the MP41030 rated for? The MP41030 is rated at 15 Amps at 12 Volts DC on the ignition circuit and 30 Amps at 12 Volts DC on the solenoid circuit.

What size mounting hole does this switch need? A 7/8 inch mounting hole is required to install the Sierra MP41030 ignition switch.

How thick can my panel be for this switch to fit? The MP41030 is designed for panels up to 5/8 inch maximum thickness.

What is the switch body made of? The Sierra MP41030 has a polyester switch body, chosen for durability in a marine environment.

How do I wire the MP41030? Wiring connects via 3 screw tab terminals on the back of the switch.

Does this switch fit a specific boat engine make or model? No, the MP41030 is a universal-fit ignition switch and is not restricted to a particular engine make, model, or year range.

What protects the switch from water and spray? A knurled black plastic face nut with a rubber cap covers the front of the switch to help keep out moisture.

What material is the back up nut made from? The back up nut on the MP41030 is brass.

What color is the Sierra MP41030 switch? The Sierra MP41030 ignition switch is white.

How much does the MP41030 weigh? The Sierra MP41030 ignition switch weighs 0.26 pounds.

Are there OEM cross-reference numbers for this switch? No OEM replacement or cross-reference numbers are listed for the Sierra MP41030.