This saw starts and runs really nice, and it even SOUNDS really cool! Compression seems good, fires up with 3-4 pulls cold. This LOW PRICE! is PHO. Im not sure how good the av bushings are, the chain adjustor bolt is slightly bent. This is the nicest 520SP I've even seen and the only one I've ever seen! Be the first one on your block to have one! 541 482 7739