Yes the 6hp is adequate but probably right on the bottom end we would want for the R780 which is probably quite a bit lighter than the 830. I think we are bang on the minimum kw/m length allowed in the YNZ Regs for racing (but that might just be the trailer yacht requirement). We’ve had no issues with push in the gulf and coming back up the Weiti against the tide, but never been in really snotty stuff as it’s no fun in a lightweight R780. For the 830 I would tend towards the next size up. The only downside will be lifting it off the transom if you store it in the boat. The 4 stroke is fantasti