Can't help with the Lion manual, but B & S do a full workshop manual for "all side valve singles," quite expensive. They also do free downloads of the instruction leaflet sent out with your engine when new. You should be able to find it on their website, using the "Model, Type, Code" stampings on your fan cowl. Type codes are just minor mods such as exhaust or air filter type. So a booklet for a different type would be OK. Even different Models such as the IC (Industrial/Commercial) versions, are identical as far as carb setting procedure, servicing, etc. I have downloaded the booklet for the 7hp IC version it is B & S part number 270367.