A unique website dedicated to fishing information from Florida's Northern Big Bend. This includes the area from the Econfina River west to the Apalachicola River
They're white because that is what color the manufacturers make them. They have a different finish than freshwater motors to make them more corrosion resistant. They also use stainless hardware. Don't know about Motorguide, but MinnKota also has a zinc prop nut on their saltwater models.
I always figured that they made em White so that folks could easily tell that ya spent twice as much money on it as they did fer the Black one another dif. in the salt and fresh is the coating that they use on the electrical circuits
I've been running the same foot controled fresh water TM on my boat for four years replaced the switches in the foot control and cleaned and painted the motor once in that time
All I have ever used was freshwater ones, until the Riptide I have...The white one looks almost as good as new after a dozed or so trips...The freshwater ones would show their weakness over time
I have beat the crap out of my Riptide over the last 4 years. Just ask anyone that has fished with me. It has held up great. Had to replace 4 props though.