This product has been discontinued.
Sierra 18-5178 Ignition Coil
Price: $68.83
Save: $42.95
(38% Off $111.78)
Part # 18-5178
2nd Day Air for $2.99 More Eligible
This item is found in the following Product Families
Replaces OEM part #
  • MERCURY MARINE 398-173
  • MERCURY MARINE 398-716
Will this work for a 1973 motor?
It seems it is after 1973 but we can only confirm by knowing your HP and serial number. If you can provide that we can take a look.

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