I've got a pretty old HR215 that I believe had an oil leak and was then run out of oil and stopped running. The guy took it to the mechanic and the mechanic said the motor had no compression and that it needs a new engine. Instead of getting it fixed he gave me the mower and got a new one. I want to try and get it running again and I'm trying to weigh my options. Do I try finding a new engine or do I try to rebuild the exisiting motor?? I can't find and GXV140-135 cc engines anywhere so it will either need to be a used one or try to put a GXV160 in its place. Not sure if that is even possible. That and I don't want to put a ton of money in this mower. Let me know what you guys think that I should do. The mower looks practically new for how old it is.