So I have an old Motor Guide 70lb thrust motor on my boat. It currently has a well used 3 blade prop on it. I will mostly be crappie fishing and either tying up on timber or staying over brush piles in open water. Motor guide says the 2 blade is better for open water and the 3 blade for the weeds. However I need as much thrust from the motor as I can get. I have seen reviews that say the 3 blade has more thrust (not a fluid dynamics engineer here so can't say whether this is true). Anyone care to chime in and let me know if I should replace the current prop with a 2 or 3 bode prop. Thanks!
I have the same trolling motor. I use the 2 blade safari for weeds and the 3 blade machette for open water.
The 3 blade is much faster and helps to keep up with schooling sandies. The only problem with the 3 blade is it tends to jerk the boat when starting. Any passenger needs to be sitting down when I hit the switch.