I have a Murray 20" push mower. After many years of use, the starter rope broke this morning as I was pulling on it. I'd like to replace the starter rope, but I'd like some advice before I start removing parts and screw it up worse. Any "How To" help?

Please forward engine info. Make, HP, Model#

Don

Model # is 20405X99A. This engine is a Briggs & Stratton Quantum 4.5 HP.