The Keenan Filter System from KTI Systems has maintenance, diagnostic and repair functions to polish fuel and switch filters. It warns boaters when the filter is clogged or the fuel contains water, and it has a backup fuel pump. Its design lets fuel go directly into the offline filter in dual-filter models, so skippers can drain the contaminants, replace the filter element and top off the filter without the usual mess. An optional smartphone interface lets remote users monitor warnings and schedule service. From $2,040 (dual filters). keenanfilters.com
This article originally appeared in the October 2018 issue.