well I know if you leave your drive in forward and then turn motor over till prop starts to move., then mark front pulley and if it takes 1 1/2 times to turn motor over completely for prop to go 1 revolution that means you have 1.5 gears and you can figure the same for 1.26 or 1.30, these may be harder cuzz they are closer together
This is the opposite of your other post. This one is correct, and the same thing I stated in my last post. However as I stated, with the XZ drive he only has the option of 1.50 or 1.36 ratio. The difference is 1 1/2 (for 1.50:1) or approx. 1 1/3 (for 1.36:1) engine revolution per one prop revolution. The more times you rotate the engine the easier it is to tell the difference between the two ratios.