Frickinfrack
Seaman
- Joined
- Apr 24, 2019
- Messages
- 50
Good day all! Not sure if this is the right forum but will ask anyway. I'm in the process of making revisions to a paddle boat conversion to be propelled via modified trolling motor. It has a hull similar to a pontoon boat and I have the trolling motor mounted underneath and in between to pontoons. on high, it sucks enough air that I can hear it and feel the difference in thrust. I know I could just do some trial and error but due to the way it's mounted that would involve drilling more holes in the shaft which I don't want to do any more than needed (see picture). Is there a "hard and fast" rule for how deep the prop needs to be in the water to not suck air? Right now, fully loaded, I've got about 3-4 inches of water over the top of the prop. I suspect the fact that it's in between the pontoons has something to do with the issue.