Hi everyone, I'm new to the sport and I have some question that you might be able to help me with. I'm building a boat to test an engine that i want to use in an airplane, so why not have some fun while doing the r&d. I cant find for the life of me , a company that sells large cog gears. My engine is a Yamaha genesis 138 hp fuel injected 3 cylinder 4 stroke out of the Yamaha ntryo. I want the engine to turn 6000 rpm at cruise and 8200 at wot. I have my ratio calculated at 2.65:1. So where can i buy pulleys ? The gears should look something like the ones on the picture. Thanks[attachment=0:3o336xr2]yamaha2.jpg[/attachment:3o336xr2]