sorry if this is out of place, i wasnt sure where to post this question. i have a new magellan 210 explorist. i put speed box on and i put max speed box on. i could be going 30 then hit the throttle and it doesnt do the actual max speed. say i hit it and it says 33.6 for a split second in the speed box, the max speed might say 32.7 or something... whast that all about. i had it out on the lake 2 weekends ago with my friends gps i got 73mph and now im only getting 68.1 but if i watch the little speed box which is really hard to do i can see it going higher than 68.1
any clues?