5-Position Ignition Starter Key Switch (Brass, 15A, No Cap) – Marine Panel Switch

This 5-position ignition starter switch offers extended functionality for advanced marine electrical system configurations. Its brass construction gives it strength and durability, ensuring reliable operation under high current loads (up to 15A) and resistance to wear. Since this model does not include a rubber cap, it’s recommended to install it in protected areas – for example, inside a cabin, under a cover, or on an enclosed dashboard where it won’t be directly exposed to water.

The 5 positions allow for more complex control typically needed in certain inboard engine setups or larger yachts:

1. Accessory Off/Park – a possible initial position (some switches have a “park” or ACC-off position when turned opposite to the start direction or as a first detent).
2. Off – main engine and systems off (key removable).
3. Accessory On (ACC) – powers accessory circuits (radio, lights, etc.) without engaging engine ignition.
4. On (Ignition) – activates the engine’s ignition/electrics (ready to run, gauges active).
5. Start – engages the starter motor (spring-loaded, returns to “On” after release).

Note: Depending on the specific model and the boat’s wiring, the exact naming and count of positions might vary. The general concept is that this switch offers more steps/contacts than standard three-position switches, allowing, for instance, separation of accessory circuits on a distinct step before ignition, or having a “park” position.

Electrical connections and contacts: The back of the switch provides 5 separate terminals, through which different circuits can be managed. This typically includes:

• Battery input (power feed)
• Accessory output (hot in ACC position)
• Ignition output (hot in ON and usually also during Start)
• Starter output (hot only in Start)
• Additional output or input (could serve as a second accessory circuit or a specific function depending on the wiring – e.g., magneto ground in Off for certain engines)

With these many contacts, the switch provides flexibility – for example, it can independently power navigation lights, electronics, etc., and cut them off completely when the key is turned to Off or Park, protecting the battery from discharge.

Installation: The mounting dimensions are standard, so the switch can fit in place of an existing ignition or in a new hole on the control panel. It comes with a sturdy metal nut for securing it. Because it has no cap, it’s important that the installation orientation prevents water from pooling in the key slot. If it must be mounted in an exposed cockpit, consider adding a separate flip-up cover or mounting it in a cabinet/panel with a door.

Advantages of a 5-position switch:

• Expanded control: Allows the operator to manage systems more granularly – for example, to turn on the radio and navigation lights (ACC) in the evening without energizing the engine ignition, then start the engine (ON->Start) with the same key when needed.
• Fewer separate switches: Instead of having a separate accessory switch or button, this combined switch integrates multiple functions into one ignition key, simplifying the helm layout and reducing component count.
• Brass reliability: The brass switch provides smooth action and robust contacts. It won’t overheat during extended accessory use and can handle the high current when engaging the starter.
• Security: As with other ignition switches, the key can be removed in the Off position, preventing unauthorized engine start or use of onboard systems.

Important: Because of the specifics of 5-position switches, ensure you have the wiring diagram or terminal assignment (included with the product or marked on the switch itself). This will guarantee correct hookup to your boat’s systems. If in doubt, consult a marine electrician.

In summary, the 5-position brass ignition switch provides a professional solution for complex systems, often used in higher-end boats and yachts. It combines the functions of multiple switches into one, making operation easier and more centralized, as long as it’s installed in an appropriate, water-protected location.