Well... Im no expert, new myself. However, my Plane has an OS .46 FX on it. After much frustration my first go at this hobby I put afterrun in it, (Marvel actually) and hung it up for 4-5+ years with absolutely no other maintenance. Perhaps I got lucky but the only thing I did when I started back into the hobby was to tear the motor down and clean all parts with Alchohol, then oiled it up real well and reassembled it. My current instructor was able to start it right up and made almost no adjustments to the tuning to get it to run like an OS should run..