I had a Victa maybe 20 years ago that had so little compression I had to put my finger on the pulley (lanyard type) to stop it from turning while I wound the rope on, couldn't bring it up on compression because I couldn't find it and it had a spark plug in the decomp hole but it ran well and still chewed through the long grass. I retired it and bought myself a new Victa with a Honda on it, but that was a big mistake