I have a Silver Pro Series Self Propelled walk behing mower that I need some repair advice on. The Muffler guard has broken away from the bolts that are holding it on to the engine assembly. I have contacted Lawnboy and am told that the guard and the muffler are sold as one piece. My question is, how or where can I find out how to take off the old muffler and guard and put the new one on? Lawn Boy couldn't help me with this very well. I checked with a local repair facility and they will charge as much to fix this as it would be to buy a whole new mower. I am fairly handy but need a guide on how to do it. Is there anything online or can someone direct me? Thanks!