Aftermarket Ignition Coil Mercury Optimax 30-300HP 879984T01 8M0077471
MS300-8M0077471
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Mercury Optimax Ignition Coil
5-pin aftermarket replacement | 8M0077471
This marine aftermarket five-pin ignition coil is designed for selected Mercury Optimax, Pro XS, EFI and Racing applications. It replaces the listed 879984 and 8M0077471-series references.
Key Features
- ✔ Aftermarket replacement; not genuine Mercury
- ✔ Five-pin electrical connector
- ✔ For selected Optimax, Pro XS and EFI applications
- ✔ Marine-use corrosion-resistant construction
- ✔ One ignition coil supplied
Technical Specs
| Part type | Ignition coil |
| Connector | 5-pin |
| Power range | 30–300HP, application dependent |
| Application | Selected Optimax / Pro XS / EFI |
| Quantity | 1 coil |
| SKU | MS300-8M0077471 |
Compatibility / Fitment Guide
For selected Mercury EFI FourStroke, Optimax, Optimax Pro XS and certain EFI two-stroke/Racing models using the listed coil family. Horsepower spans approximately 30–300HP, but compatibility must be confirmed by original part number and serial-number-specific catalogue.
Part Number Cross Reference
| Mercury references | 300-879984T01; 300-8M0077471; 339-879984; 339-879984A01; 339-879984A1; 339-879984T00; 339-879984T01; 339-8M0077471; 8M0042380; 8M0077471 |
This is an aftermarket replacement and not a genuine Mercury component.
Questions & Answers
Is this a genuine Mercury coil?
No. It is an aftermarket replacement.
Will it fit every Optimax?
No. Match the original part number, five-pin connector and engine serial number.
Does it fit 30–300HP engines?
Only selected engines within that range use this coil family.
How many coils are included?
One coil is supplied.
Note: Diagnose wiring, spark plugs and control signals before replacing a coil.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
