I had a ’00 200hp Optimax on a previous boat and it was an excellent motor. Although that was a much maligned motor in the press it was fast and reliable for me but I follow the break in instructions to the letter on new motors and allowed it time to warm up each time out, I’m guessing most folks didn’t. It did have that fantastic Mercury growl when idling – not as quiet as my 225 Yamaha. Those motors are meant to be opened up to WOT frequently. For your application it may be a bit loud for putting around the lake but certainly manageable. I never tried to troll with mine so not sure how sustained driving at slow speeds effects them.