Sea-Dog Three Position Ignition Switch 420351-1, Magneto Style, Off-Ignition-Start, Stamped Brass

The Sea-Dog 420351-1 is a three position, magneto-style ignition switch built for off, ignition, and start functions on inboard and sterndrive engines using magneto ignition. The switch is constructed of stamped brass for corrosion resistance in a marine environment and includes a five screw terminal electrical connection for wiring the ignition and solenoid (starter) circuits. Its ignition circuit is rated 15 amps at 12 volts DC, and the solenoid (start) circuit is rated 30 amps at 12 volts DC. A key detail for installers: the ignition (accessory) circuit is not activated when the key is turned to the solenoid (start) position, so accessories wired to that circuit will not draw power during cranking.

The switch uses a 13/16 inch diameter long shaft designed for panels up to 1-1/8 inch thick, and it does not include a cap. Two keys are included with each switch, and a blank replacement key (Sea-Dog 420399) is available separately if additional or replacement keys are needed. This switch is intended as a direct panel-mount replacement for helm stations using a magneto-style three position ignition switch of this shaft length and terminal configuration.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 420351-1
• Product Type: Three Position Ignition Switch, Magneto Style
• Switch Positions: Off, Ignition, Start
• Shaft Diameter: 13/16 inch
• Shaft Type: Long
• Maximum Panel Thickness: 1-1/8 inch
• Terminal Type: 5 Screw Terminals
• Cap: No cap
• Ignition Circuit Rating: 15 Amps at 12 Volts DC
• Solenoid Circuit Rating: 30 Amps at 12 Volts DC
• Material: Stamped Brass
• Keys Included: 2
• Weight: 0.414 pounds
• UPC: 035514423618

Fitment

Designed for helm panels using a magneto-style three position ignition switch with a 13/16 inch long shaft and panel thickness up to 1-1/8 inch.

Replaces (OEM)

No manufacturer cross-reference numbers are listed for this part.

Frequently Asked Questions

What functions does the Sea-Dog 420351-1 ignition switch have? It has three positions: off, ignition, and start, making it a magneto-style switch rather than a four-position accessory switch.

Does the ignition circuit stay powered while cranking the engine? No. On the 420351-1, the ignition (accessory) circuit is not activated while the key is held in the solenoid (start) position.

What is the amperage rating of this switch? The ignition circuit is rated 15 amps at 12 volts DC, and the solenoid (start) circuit is rated 30 amps at 12 volts DC on the Sea-Dog 420351-1.

What material is the 420351-1 ignition switch made from? It is constructed of stamped brass, chosen for its corrosion resistance in marine helm applications.

What size shaft does this switch use and what panel thickness does it fit? The 420351-1 uses a 13/16 inch diameter long shaft designed for panels up to 1-1/8 inch thick.

How many terminals does the switch have for wiring? Five screw terminals are provided for the electrical connections on this Sea-Dog ignition switch.

Does the Sea-Dog 420351-1 come with a key or cap? Two keys are included with the switch, but no cap is included.

Can I get a replacement key for this ignition switch? Yes, a blank replacement key, Sea-Dog part 420399, is available separately for the 420351-1 switch.

How much does this ignition switch weigh? The Sea-Dog 420351-1 weighs 0.414 pounds.

What is the difference between the 420351-1 and a four position ignition switch? The 420351-1 is a three position magneto-style switch (off, ignition, start), while a four position switch adds a separate accessory position; the 420351-1 does not have an accessory setting.