I'm sure EFI usually means greater gas economic climate and there are Mercury maintenance stores almost everywhere, but that can be of minor comfort and ease when stranded twenty miles from the ramp.Also, I do know Mercury's 4-stroke are made by Yamaha (or not less than a very good part https://emiliobfkkh.p2blogs.com/33284739/the-greatest-guide-to-mercury-4-stroke-outboard-deals