Have you run the line that way deliberately? The line should go round the inside small guide wheel first, then round the driven wheel then out and round the outside small guide wheel. That way the line is in contact with 360 degrees of the driven wheel and you don't have to pull on it. I just let the line slip over my palm into the boat. (if you do have a mishap I hope that cleat it's tied to is well bolted down!)
