Attemping my first valve adjustment. I am assuming that the compression release, on my John Deere snowblower with 342cc Briggs and Stratton single ohv engine with approximately 25 hrs. run time, is not working. I have almost pulled my arm off pull starting it. Electric starter can't turn it. It came this way right from Lowe's. I did not realize it wasn't suppose to be this hard to pull. Live and learn. Runs great once started. It's still under warranty but from what I've read online I think this adj. will fix it and it seems easier than hauling it to the shop. Thanks for the information.