My buddy bought this used for $150. Cut one small tree, and the new hand tighten system it has (not the 2 bar nuts but the plastic wing nut) broke off. He gave to me to fix. I got the new part and ran it, the bar overheated right away. I removed the clutch and found a lot of melted damage. The oil channel from pump to bar is open, the worm gear for pump is melted, and the clip on worm gear is missing some. Did I mention there's NO needle bearing for the drum, it's just sitting on the shaft. I assume the guy knew what he was selling. It ran perfectly otherwise btw. So now, is it worth fixing, I would need a whole half of case, correct? Keep in mind, I've never gone that deep into a saw before, have dealer fix?