Ignition Coil 339-879984T00 300-8M0077471 for Mercury Optimax 184-0003 Sierra 18-5159
Ignition Coil 339-879984T00 300-8M0077471 for Mercury Optimax 184-0003 Sierra 18-5159
Product Overview
Ignition coil for Mercury Optimax outboards, supplied as 1 x coil. It replaces Mercury 339-879984T00, 339-879984A1, 300-8M0077471, 300-879984T01, 879984T00, 879984A1, 879984T01 and 8M00774714, plus Sierra 18-5159 and CDI 184-0003. A failed coil shows up as a dead cylinder, a rough idle, a flashing Guardian fault code, or a misfire above 4000 rpm that gets worse under load.
Specifications & Attributes
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Ignition Coil |
| Engine Type | Mercury Optimax outboard |
| Quantity | 1 coil |
| Warranty | Standard |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Mercury | 339-879984T00, 339-879984A1, 300-8M0077471, 300-879984T01, 879984T00, 879984A1, 879984T01, 8M00774714 |
| Sierra | 18-5159 |
| CDI | 184-0003 |
Compatible Engines
Fits the following Mercury outboards:
| Brand | Engine Family | Application |
|---|---|---|
| Mercury | Optimax | Direct injection outboard |
| Mercury | Optimax | Coil-on-plug ignition |
What's Included
| Component | Qty |
|---|---|
| Ignition Coil | 1 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Before You Buy
- Verify your engine model and serial number before ordering
- Fits Mercury Optimax outboards — check the coil part number on your engine
- Read the fault code and swap a known-good coil before buying, to confirm which cylinder is down
- Supplied as 1 x coil — spark plug is not included
- 30-Day Easy Returns
- Free Worldwide Shipping
- OEM Quality Without the Markup
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Before You Buy
Frequently Asked Questions
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We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
See our full Refund Policy for complete details.
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