The starter cord on my "Yard Machines" Model 510 Lawn Edger broke. There is no cord or attachment visible under the finger guard. The finger guard is rivoted to engine body and I can't get to or even see where the cord attaches. It has a Briggs & Stratton Model 98902 engine. Neither of the operating manuals I have includes any explanation on how to replace the cord. Can anyone help me out? Step-by-Step instructions, with illustrations would be outstanding!:confused: