2 vs 4 blade prop

[kochanut]

quick question. i would assume based on nothing more then the physics that a 4 bladed prop displaces more water then a 2 bladed prop (for a 8 horse kicker that is) but other then that whats the differance? i would also venture a guess and say weight. reason im asking is i was looking over bass pro dot com and noticed they had a sale for evenrude 8 horse motors, 2 bladed props. i bought TS's boat from him, and dont have ready access to call him and ask if he has a spare. has anyone ever noticed a differance when going from these two? i have also noticed from time to time a 2 bladed vs 4 bladed propr on peoples bow mount trolling motor, but i have never seen one on a stern mount motor, why is that? is it simply because a stern mount motor is designed to push the entire weight of a boat and needs the extra blades and a bow drive is to slowly pull the weight of the boat? just curious is all, i saw these things and steam started comming out of my ears from thinking to hard.
[signature]