Sea-Dog Four Position Ignition Switch 420375-1, Long Shaft, 4-Screw Terminal

The Sea-Dog 420375-1 is a four position ignition switch built for accessory, off, ignition, and start functions on a boat helm. It has a 13/16 inch diameter long shaft, designed to pass through a panel up to 1-1/8 inch thick, and terminates in four screw connections for wiring the ignition circuit, solenoid circuit, and accessory circuit. The switch is rated 15A at 12VDC for both the ignition and accessory positions, and 30A at 12VDC for the solenoid position, giving it enough capacity to handle a typical inboard or sterndrive cranking circuit.

Construction is polypropylene, a corrosion-resistant plastic that holds up to the marine environment better than metal switch bodies, and the screw-terminal version of this switch includes a rubber boot to help seal the back of the switch from moisture and spray. The switch ships with two keys and a cap. It is a direct helm replacement or new-install switch for boats needing a standard four position key switch with screw terminals; a four-blade-terminal version and a screw-terminal-only replacement cap are also offered separately as distinct part numbers if wiring style needs to differ.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 420375-1
• Switch Positions: Accessory - Off - Ignition - Start
• Material: Polypropylene
• Shaft Diameter: 13/16 inch
• Shaft Length: 1-1/8 inch (Long)
• Maximum Panel Thickness: 1-1/8 inch
• Terminal Type: 4 Screws
• Includes Cap: Yes
• Ignition Circuit Rating: 15 Amps at 12VDC
• Solenoid Circuit Rating: 30 Amps at 12VDC
• Accessory Circuit Rating: 15 Amps at 12VDC
• Includes: Two keys
• Item Dimensions: 7.88 x 3.88 x 0.88 inches
• Color: Black
• Weight: 0.272 pounds
• UPC: 035514423670

Frequently Asked Questions

What are the four positions on the Sea-Dog 420375-1 ignition switch? The 420375-1 cycles through accessory, off, ignition, and start positions, covering the standard functions needed to power accessories, kill the circuit, run ignition, and crank the engine.

What size shaft does this switch have? It has a 13/16 inch diameter shaft in the long configuration, measuring 1-1/8 inch, and is rated for a maximum panel thickness of 1-1/8 inch.

Are the terminals screw type or blade type on part number 420375-1? This version uses four screw terminals. A four-blade-terminal version of the same switch is sold separately under a different part number, so check your wiring style before ordering.

What material is the Sea-Dog 420375-1 switch made from? Polypropylene, a plastic that resists corrosion and holds up well in a marine environment compared to metal switch housings.

What amperage is the switch rated for? The ignition and accessory circuits are each rated 15 Amps at 12VDC, and the solenoid circuit is rated 30 Amps at 12VDC on the 420375-1.

Does the switch come with keys? Yes, the Sea-Dog 420375-1 includes two keys along with a cap.

Is a boot included to protect the back of the switch from water? The screw-terminal version of this switch, including the 420375-1, includes a rubber boot to help protect the terminals from moisture.

How much does this ignition switch weigh? The 420375-1 weighs 0.272 pounds.

What is the replacement cap part number for this switch? Sea-Dog offers part number 420398-1 as a replacement cap that fits the 420375-1 four position ignition switch.

Can I get a replacement key for the 420375-1? Yes, a blank replacement key is available separately under part number 420399 for this four position ignition switch.

What color is the switch housing? The Sea-Dog 420375-1 has a black housing.

What are the overall dimensions of the switch? The 420375-1 measures approximately 7.88 x 3.88 x 0.88 inches.