To start, invest in a stainless prop. Secondly, get a CMC kick up jack plate. These two items will allow low speed stump strikes without damage to either prop or motor. Marion can be hazardous, but there are many many safe lanes to run on speed. Any time you exit the river channel the water depth will shallow. This doesn’t mean you can’t run on speed, you just need to know the safe lane. There are three well marked lanes into Jacks Creek, the first two will need to be learned by watching others or going with someone that knows them. The third can be ran on speed by anyone. Go to channel marker 132 in the river, hang a left staying centered in creek, water will be 5 to 6 feet to start but most importantly stump free.