Re: Kohler 29 vs Vanguard 36 Prodrive.. Performance expectations
For what its worth I had a 27 Kohler on my hull and had similar issues to what you are having. It was a great motor, but when I would load the hull down with gear, blind and 1 or 2 other people it would plow sometimes. My damn friends were too fat.
I replaced it with the 36 and it was like night and day. I went from 24-25 max speed with the 27 to 28 with the Briggs 36. I can load it down with gear and two other people and get on step well and still do 23-25 mph depending on conditions. I am much more satisfied with the 36.
The 27 kohler is a great motor, it just needs to be matched carefully with specific hulls.