We used a Mac 610 back in the 1970's to cut firewood for 2 farm houses. I think my dad purchased it from the Monkey Wards catalog. It did a fine job and proved to be dead solid reliable for quite a few years. In 1980 we retired it when we purchased our Husqvarna 480CD which I still have today and it still runs as good as the day we bought it.
The Mac 610 sat in my dad's basement for several decades, we never found ourselves wanting to resurrect it and mom ended up selling it at a yard sale. Remarkably I filled it with fuel and it roared to life a few days before the sale. I cut up a Maple log that was down along their driveway. The saw was heavy, and "flat" power curve, but probably still out their cutting firewood for someone.......Cliff
The Mac 610 sat in my dad's basement for several decades, we never found ourselves wanting to resurrect it and mom ended up selling it at a yard sale. Remarkably I filled it with fuel and it roared to life a few days before the sale. I cut up a Maple log that was down along their driveway. The saw was heavy, and "flat" power curve, but probably still out their cutting firewood for someone.......Cliff