I'd avoid Motorguide at all costs, I now call them "Aspros" because they dissolve in water. I had my first one for 2 years, always washed it, never treated it rough, it corroded like crazy, despite being a SW model. They did their best to avoid any warranty. Sold it.
The second one cam with a boat I bought, I was reluctant, but gave them another shot, once again, it started to corrode badly with in a few weeks of use. Got it repaired & repainted, sold it cheap, bought a new MinnKota, and 3 years on there is no corrosion and it has been faultless.