G-mark .061 prop question
I have an .061 that I purchased a 6x3 prop for based on instruction sheet that came with motor. The hole in the center is bigger than the screw that holds it on. Can I just use brass tubing to make a bushing to fit or is there any commercial nylon spacers available? The screw that holds the prop on is the same as that of an .049 cox. I am also having difficulty locating a pressure fitting for the muffler. Any suggestions? I know Cox has props that fit their shafts, but someone has to have run into this issue and resolved it. The prop I have is an APC sport 6x3.