kind of looks like mine.it did come off a blower.its a 25cc poulan.2 rings as you know.large transfer ports.should be a screamer.backplate is already stuffed into engine.easy to convert basiclly.mine only weighs 3.5 lbs as seen in pic.after cutting and if i go cdi it should weigh a little over 2.5 lbs or a little less.i will do mine after im finished with my echo24 and my echo 61cc twin saw engine.if you need any help or have any questions get hold of me by pm first and then we can go email if you want or phone.bought mine from farley9n.maybe he will join in.