Sorry to thread mine, but am at wits end trying to sorch gearbox sprocket for my colt 8. I have downloaded the manual and it shows shaft has a key way and smooth shaft. My 3 speed has a 28 spline shaft and no key way. My mower shop has supplied the keyway sprocket and also a 32 spline sprocket and now has given up. Anyone got info on i tooth 28 spline? Cheers
Rob.
