Give John a call, he can probably help you.
http://jonestrollingmotor.com/
yesterday our new minn kota terrova deployed in 40 miles per hour winds at lake weiss. my fault did'nt get it snapped in good , broke it in half. it also destroyed my speed indictator which I've had maybe 6 or 7 years. so long I've forgot where I got it. The gentleman that did guide at baysprings and started weisslake guide service online help me find that one, but he passed on. we like it better than our gps but we use them both.. any help will be appreciated..
Give John a call, he can probably help you.
http://jonestrollingmotor.com/
Look In Cabela's Or Go To Cabela's On Line.they Have Electric And Mannal That Tells Your Trolling Speed.