The rudder is now 19 inches long and close to an inch deeper than the original rudder. I haven't water tested it yet, but I assume it will cut the turning radius way down and it should track a lot better.
I simply pulled the rudder off, ground off the ribs on the side I attached the extension to, and drilled the holes and bolted on the extension.
I cut the nylon cutting board to size on my table saw and rounded the edges with my grinder.
Took about half an hour from start to finish, and I have the second extension ready to attach to my other Mariner
This mod was done with:
Half of a Walmart nylon cutting board (about 13 bucks and it will make two rudder extensions)
Pack of Walmart 3/4 inch machine bolts (less than two bucks) - I'll eventually replace these with stainless hardware but I didn't have time to get any this weekend
All in less than 15 bucks, and I already have the second one cut out, so it will end up being less than ten bucks per rudder after I get the stainless hardware
I will be water testing my recent mods on a week long fishing trip to Marathon Fl next week, I'll see how they hold up
I forgot to feather the front end so i don't catch weeds, I'll do that tonite