I have a two stroke snow blower which wouldn't start during this winter of numerous snow storms.I didn't expect to become an expert concerning two strokes,but I wanted to understand what the carb. looked like inside in order for me to try to clear the clog in the jets-which is usually the cause of engines not starting.Well, after researching the carb I came across a simple tip to get the engine running with out removing any components.I tried it an voila the engine came to life.Needless to say more difficult problems would require a more intensive research and perhaps component change.If you have sufficient tools and patience this book is well worth the investment............