Arco IG002 Ignition Coil — Mercury Outboard 2 / 3 / 4 / 6 Cylinder
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
OEM-Grade Ignition Coil for Mercury Outboard Engines
The Arco IG002 is a direct-fit replacement ignition coil built for a wide range of Mercury outboard engines spanning 2-cylinder through 6-cylinder configurations. Covering models from the early 1970s through the mid-2000s, it’s one of the broadest-coverage ignition coils in the Arco lineup and a reliable choice for restoring strong spark output on aging Mercury powerheads.
Compatible Applications
- Mercury 2-Cylinder, 6–40 HP (1970–2006)
- Mercury 3-Cylinder, 45–90 HP (1976–1997)
- Mercury 4-Cylinder, 45–125 HP (1976–1997)
- Mercury 6-Cylinder, 90–225 HP (1976–2000)
Replaces OEM Part Numbers
- Mercury: 339-832757A4, 7370A8, 7370A2, 4995A2, 4774A1, 7370A6, 7370A19, 7370A16, 832757A3, 7370A23, 7370A17, F718475, 832757B4, 7370B13
- Sierra: 18-5186
Parts Desk Insights
The IG002 is the go-to coil for Mercury outboard tune-ups and no-spark diagnostics across a very wide production range. Weak or intermittent spark, hard starting, and misfires at higher RPM are the most common signs of a failing ignition coil on these engines. Because this coil covers so many cylinder counts and horsepower ranges, always verify your engine’s model and year before ordering. For Mercury inboard, sterndrive, OMC, or Volvo Penta ignition coil applications, see the Arco IG013 Ignition Coil.
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.