I'm sure EFI means much better fuel economy and you will find Mercury fix retailers just about everywhere, but that may be of minor comfort and ease when stranded 20 miles through the ramp.Also, I'm sure Mercury's four-stroke are made by Yamaha (or not less than a great part of https://opossum36667.bloggosite.com/41341787/compact-tohatsu-engine-for-small-boats-an-overview