I have two Husqvarna 125B leaf blowers. Had one for 2 seasons , it quite working and I needed one right a way, bought second 125B. Started to try to repair #1. Checked Carb. spark arrestor and mag. all seem to be OK. I then realized that the pull starter was very hard to pull. Removed the spark plug and the engine spun with little resistance. I emptied the gas tank and spun the engine until I had no more fuel vapor coming out plug hole. Reinstalled spark plug, again engine very hard to turn over. compared with blower #2,which has less than 5 hours and runs fine. Any Idea what would cause what seems to be excessively high compression.