The prudent answer is YES  and absolutely !

At the same time you pick up a screwdriver or wrench and get ready to  perform some work on your trusty Rotax engine, be it a 2 or 4 stroke, you should also be reaching for your engine manual. Let’s face it a manual is as important as your wrench. Your neighbor is not a walking Wikipedia and won’t always provide the correct advice or at least perhaps not in correct sequence.