Possibly. A 236 is a bowrider or Sunesta deck boat? (Sorry, I don't pay attention to those boats, so I don't know exactly what model that is). And how will you operate the boat? With a light load or 12 of your closest friends? Is that the lowest horsepower that Chaparral offers? If it is, then it's underpowered, but not by as much as some other manufacturers would underpower it. Chap is not afraid to put in enough power for a boat, you just have to be ready to pay more for it!