Hello, I am having some problems with my 20hp johnson on my 14' duck boat (it keeps jumping out of gear)and it is getting me started thinking about buying or making a mud motor. With the way water levels are going, it seems like the right option. Duck hunting is the only thing this boat is used for, and we generally don't run for more than 15-20 minutes and we are at our hunting spot. I have looked at the weld it yourself kits and they seem overpriced. I am just wondering if any one else has had any success with either making a longtail mud motor or a surface drive unit and could use some pointers. I have a lot of time a good mig welder, and access to parts, just not a whole lot of money. The boat w/ the 20hp johnson on cost me $500 and I can't see spending $1500 or more on a mud/surface drive motor. Any input is appreciated.