A few weeks ago I retrieved a Jonsered 520 SP that I had purchased in 1983, used to cut several cords of woods and then kept for the past 20 years in a (very) remote cabin. I used it sporadically after that on stays there but hadn't run it at all for several years. Since I spend so little time in the area now, I brought the saw to town. What I'm amazed at is how light and powerful it is. The antivib is good and the saw is in such pretty shape that I almost hate to use it at all. What I'm wondering is what the specs are. When I run it dry, I'll weigh the powerhead but if anyone has the specs and especially the power I would love to know the numbers. I assume from the "520" that it is 52 cc? I did a search and couldn't find any information but maybe I missed something.