I have on m y workbench an older Dolmar that has been run hard and put away wet numerous times that I have not really gotten into yet that has of all things a cracked front case and it's peeing bar oil from the crack. I presume the crack isn't impacting the crank or the crank seals (don't know yet as it's not taken apart but can I weld up the case crack and have the saw be viable again? Keep in mind that we are very accomplished TIG welders and have the proper equipment and skill set for certified TIG welding in exotic alloys and do it every day. I just am not sure about this old saw and it's case crack yet as it's not taken apart at all. That is next on the agenda, that and getting parts for it. I have a feeling it has at least piston and ring issues additionally. It has many hours on it, basically run hard. I'll know when I pull the muffler and have a look inside and see the 'bad news'...