My RV-12 Rotax 912 has not been started for 10 months while doing ACI, brake job, satisfying SB?s, etc. l recently thought it would be a good idea to turn the prop by hand to pump the oil back into the oil canister. (A fresh oil change was done just before my final flight 10 months ago). Well, the first thing I noticed when I started turning the prop was that the engine compression seemed low. I kept turning the prop - about 100 revs - and I never could get the ?gurgle?. Can someone explain what is going on an tell me what to do. I don?t intend to try starting the engine until I?m sure everything is back to normal.