Rotax maintenance manual specifies an inspection/service every 100 hours. The Kitfox factory/FAA specifies a thorough inspection annually, which includes many items that are on the Rotax 100 hour checklist. Since I fly about 125-135 hours a year, the time for the annual never coincides with the Rotax 100 hour and many items overlap on both checklists; what to do? Since my 100 hour rolls around more often than the annual, I took all the overlapping items and marked them out of the annual checklist because they will be checked more than annually. In other words, my annual checklist includes almost no engine items, which really speeds up my annual. Of course all this is carefully logged and documented. I have been doing this for 800 hours, 6 years, now. I am curious what others are doing in similar circumstances?

If I ever start flying less than 100 hours/year I guess I will then do the opposite and mark out all the overlapping engine items from the 100 hour checklist. I suppose a person could just do everything on both checklists whenever the time rolls around, and not be concerned that some things get done twice within a few months; it certainly wouldn't hurt to do some overkill.