Both motors have the same prop, so it will take more rpm's to get more
thrust--found out the 50 has around 1700 at top speed, and the 65 has 2100,
so that's pretty much the same proportionate difference (1700/2100; 50/65)

"Grumman-581" wrote in message
. ..
"Doug Kanter" wrote ...
I have no idea, but I'm wondering why it matters.

Well, I would think that you would want to get a trolling motor with the
highest thrust for the lowest RPMs to made it really quiet...

On the other hand, maybe he's wanting to make a serious frozen drink
mixer...