My 1987 ConWalk 20' won't turn more than 3300 rpm @ 30 mph WOT. I'm fine with the top speed, but I know I should be turning closer to 4400 rpm WOT. Also, the boat developed some vibration last year, and there was a little more play in the cutlass bearing than I think there should be, so I need to replace it anyway, and am hoping that cures the vibration. So,... I just pulled the prop and pressed out the old cutlass bearing (1" x 1-1/2" x 4"). I am considering replacing the original 13 x 13 prop with an Acme 913 based on comments on this forum. I am looking for any recommendations or comments on the Acme 913, and I am wondering if anyone has any recommendations on a brand and/or vendor for a replacement cutlass bearing. Thanks, and cheers!