Here's what I use for this situation:
https://smile.amazon.com/Titan-Controls-Multi-Function-Controller-Single/dp/B0040R6F44/ref=sr_1_1?ie=UTF8&qid=1515872733&sr=8-1&keywords=titan+controls+mercury+4
It's a tad pricier but it's made for doing exactly what you're trying to do. The one you linked is intended for hydro water pumps.
Something like this?
http://www.amazon.com/gp/product/B0040R6F44?psc=1&redirect=true&ref_=oh_aui_detailpage_o07_s00