I just got the engine last night. The previous owner got it used also and had not run it. He was passing information on he had heard. I didn't know anything about what he had said but the Italian built .90s go back to a time when I didn't run anything bigger than a .25 for economic reasons. I actually prefer the .61 and .75. I got this one thrown in on a trade for a .61. I have to dig up a carb and muffler for it first so I haven't put on my test stand yet. I asked hear because most of us have a little snow on the roof and long memories.