Ignition Coil for Yamaha F4 F5 4HP 5HP Outboard 67D-85640-00 670-85640-00

Replaces OEM 67D-85640-00 and 670-85640-00. Why are there two different Yamaha part numbers (670 vs 67D)?. Both 67D-85640-00 and 670-85640-00 are interchangeable for the F4/F5 4-stroke engine range.

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