Sierra UN12140 Marine Ignition Starter Switch – 4-Position, Conventional, Zinc, 4-Stud Terminal, 12V/15A
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Sierra UN12140 Marine Ignition Starter Switch – 4-Position, Conventional, Zinc, 4-Stud Terminal, 12V/15A
The Sierra UN12140 is a conventional 4-position marine ignition starter switch with a zinc body and four stud terminals. The four positions — Accessory, Off, Ignition, and Start — cover the full conventional ignition sequence for most single-engine marine applications. The 5/8" mounting hole fits standard helm panel cutouts. Rated at 12V/15A with a 30A solenoid trigger circuit.
The zinc construction provides a cost-effective alternative to brass ignition switches for applications where corrosion resistance requirements are met by the installation environment. Does not include a push-to-choke function or a protective boot. Four stud terminals provide secure, positive wiring connections for the accessory, ignition, start, and ground circuits.
Key Specifications
- Part Number: 11-UN12140
- Switch Type: Conventional ignition starter switch (key-operated)
- Positions: 4 — Accessory / Off / Ignition / Start
- Body Material: Zinc
- Terminals: 4 stud terminals
- Mounting Hole: 5/8"
- Voltage: 12V
- Current Rating: 15A
- Solenoid Circuit: 30A
- Push-to-Choke: Not included
- Boot: Not included
Compatible Applications
- Single-engine marine helm panels requiring a conventional 4-position ignition starter switch
- Replacement for worn or damaged conventional ignition switches with a 5/8" mounting hole
- Applications where a zinc-body ignition switch is acceptable and a brass body is not required
- 12V marine electrical systems with a 4-position Accessory-Off-Ignition-Start sequence
Parts Desk Insights
The UN12140 is the right choice when you need a straightforward 4-position conventional ignition switch and a zinc body is acceptable for your installation — it covers the standard Accessory-Off-Ignition-Start sequence used on most single-engine marine applications. The 4-stud terminal configuration provides a secure wiring connection for all four circuits. Note that this switch does not include a push-to-choke function or a protective boot — if your engine requires push-to-choke, or if you need a boot for panel sealing, you’ll need to source those separately or choose a different switch. For a brass-body 4-position conventional ignition switch, the Sierra MP39070 Brass 4-Position Conventional is the brass alternative. For a 3-position conventional switch with a boot included, the Sierra MP41030 3-Position Conventional with Boot covers that application. For a 4-position magneto switch with push-to-choke, the Sierra MP41080 4-Position Magneto with Push-to-Choke is the magneto alternative.
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.