Minn kota trolling motor

I've got a 65lb Minn kota all terrain 24v, its got 5 speed levels. 1-4 are all about the same speed and its way slow, but 5 is way too much I replaced the speed control but it didn't do much. Now when its out of the water you can tell the difference in each setting but not when its in the water. Yesterday I caught a stump and broke a prop blade, so I'm thinking of buying a kipawa performance prop. So whats the verdict on the situation?

See if this helps http://tnhatlfs01.thenethouse.com/st...r%20Manual.pdf

Didn't really find anything that discribed the problem I'm having

Give John Jones at Jones Trolling Motor in Texarkana a call. He's a sponsor here and really helpful. Http://Jonestrollingmotor.com