These things are still under warranty, right? 
I picked this up from a local guy for $200 with the understanding that all it needs is an impeller, otherwise I could bring it back to him for a full refund (our agreement is in writing). I got it home and ran a compression test. I should've done it there, but he was so sure it ran well otherwise. Bottom cylinder is completely dead, 0 psi. The cylinder is moving, and with my finger over the spark plug hole I can feel a small amount of air movement that almost instantly dissipates. Top cylinder is 75 psi dry.
My question is, do I keep it or take the refund? It doesn't look like a head gasket would be big deal to fix, but I don't think I want it if the cylinder or bore is shot, unless that's an easier fix than I think it is. Is there any way to isolate the leak without cracking the power head open? Or is it a reasonable bet that thing overheated from the bad impeller and blew the head gasket?
I picked this up from a local guy for $200 with the understanding that all it needs is an impeller, otherwise I could bring it back to him for a full refund (our agreement is in writing). I got it home and ran a compression test. I should've done it there, but he was so sure it ran well otherwise. Bottom cylinder is completely dead, 0 psi. The cylinder is moving, and with my finger over the spark plug hole I can feel a small amount of air movement that almost instantly dissipates. Top cylinder is 75 psi dry.
My question is, do I keep it or take the refund? It doesn't look like a head gasket would be big deal to fix, but I don't think I want it if the cylinder or bore is shot, unless that's an easier fix than I think it is. Is there any way to isolate the leak without cracking the power head open? Or is it a reasonable bet that thing overheated from the bad impeller and blew the head gasket?