Hey Darmic1 ..... I just got back from the car show in Carlisle PA and I bought an O&R engine But i have no idea what it was for because it's just the engine. I've scoured the internet and the only one that looks like mine is that white cased chainsaw you have. Could you give me the specs on that or any info? Honestly it doesn't even say if mine is a 3/4 or 1hp. All it says is "refer to # 745". I lubed it up and cleaned it, but it probably needs a headgasket and diaphragm like they all do.