150ao
I have a Homelite 150AO. It was my first chainsaw.
The "AO" stood for automatic oiler maybe?
My mom and dad bought it for my birthday in 1977 when I was living in an old farmhouse and heating with wood after moving 400 miles away up north. I was about 25 years old.
There was a big boom in wood heating back then so with birthday money in hand I went to buy a low-end chainsaw that October, but the shelves were nearly bare. The only saw in my price range was the 150AO so I bought it. I ran that thing for about ten years. Put a 3/8" chain on it as I recall. It cut a lot of firewood and built this log house too. It never blew up but the starter got worn out. Don't remember how badly it vibrated but it was loud. I remember it had a simple felt air cleaner and the spark plug was in a deep recess and hard to get at. Later I wished I had gotten a Super EZ which was a more conventional design, manual oiler, and with a sparkplug out in the open.
I retired the 150AO around 1986 for well-used Jonsered 451AV. I still have the 150 and it's in running condition more or less.