Cole Hersee M550BP 3-Position Battery Ignition Switch – Off / Ign / Ign+Start
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Full Ignition Control in a Compact Brass Switch
The Cole Hersee M550BP gives you three-position ignition control — Off, Ignition, and Ignition+Start — in a solid all-brass package built for long-term marine panel installations. Turn to Ignition to power your electronics and gauges, then continue to Ign+Start to crank the engine. Release and it returns to the Ignition position, just like a conventional key switch — without the key.
All-brass construction throughout means this switch holds up in humid, salt-air environments where lesser materials corrode and fail. The chrome-plated brass face nut gives a clean, finished look on any panel, and the 13/16"-24 threaded stem fits standard marine switch cutouts.
Key Features
- 3 positions: Off / Ignition / Ignition+Start
- Rating at 12V: 10A ignition, 5A start
- All-brass construction — corrosion-resistant throughout
- Chrome-plated brass face nut for a finished panel appearance
- 3 brass screw terminals for secure wiring connections
- Mounting stem: 13/16"-24 thread, 1-7/32" length
- Fits standard marine panel switch cutouts
Compatible Applications
- Outboard and inboard marine engine ignition circuits
- Powerboats, runabouts, and bass boats
- Custom marine electrical panels
- Replacement ignition switches on older vessels
- 12V DC ignition and start circuits
- Powersport and small engine applications
Parts Desk Insights
Best use case: The M550BP is the right call when you need a clean, no-key three-position ignition switch for a custom panel build or a straightforward replacement on a smaller outboard or inboard setup. It's particularly well-suited for installations where a keyed switch isn't required — think secondary helm stations, engine room panels, or custom console builds where simplicity and durability matter more than key security.
Choosing the right switch: If you only need Off/On ignition without a start position, the Cole Hersee 2-Position Starter/Ignition Switch is a simpler option. For applications requiring accessory, ignition, and start positions with a key, see the Cole Hersee 9579BP 4-Position Key Ignition Switch or the Cole Hersee M712BP 4-Position Ignition Switch.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.