I just got a 89 tracker V17 with a 70 evinrude,,,not happy with the way it runs or the speed..the boat handles great in rough water,,this is what i was thinking,,,it is rated for a 80,,was looking at weights of the 70 vs 90 or 115...the v4`s run about 50lbs heavier,,,the tracker only runs like 35-37gps that sucked,,,think the boat could handle say a 90