I recently read somewhere that a two-blade prop on a trolling motor is faster than a three. Not as good with weeds, but faster for general trolling. Is this true? Any other info on the subject?

A two blade prop has more area than a 3 blade and has more thrust because of the larger surface area. A 3 blade has less surface area and spins faster and is better for chopping up weeds. Because of the lack of  surface area it lacks in thrust.  

I use a trolling motor as primary power on a small boat and when I switched from the stock M.K. prop to a three blade (Kipawa) my speed and batt. life went up. However,this is a light ,long and narrow boat so the results are undoubtedly different than with a heavier vessel. The three blade prop seems to be just as weedless as the weedless wedge.  Hope this helps.

I asked Billy Wells who owns Wells, Inc., the trolling motor repair shop in Richmond, Virginia, the same question regarding the two and three blade trolling motor props and Billy said to stick with the plastic three blade prop.

Since trolling motors are Billy's speciality, I will trust his judgement and go with a plastic three blade prop.