prop walk

I've just picked up 27' Lancer Power sail and took her yesterday for the first time. She was neglected for 3 years, tied up in the marina and had the bare minimum of attention. After a couple full days getting her cleaned up,(new fuel, surveyed all the lines, sails etc) she was in great shape...

I have a 08 41ds with the Yanmar 4hj4 54hp. Boat came with a fixed 3 blade and I have since changed to a feathering prop. When motoring, The helm has great force to port. This was the same with either prop. Has anyone else experienced this with the same boat, i.e.; 2004 -2012 H41 ac or ds? This...