Just so as there is no doubt - the Rotax is very different to other aircraft engines, so those going on about not gurgling as it's potentially harmful to yourself or the engine are unfortunately incorrect.
That said, the 91x will start by hand (search this forum and others for links to AAIB reports), so treat the propeller with due respect.
Finally, the gurgling process works much more efficiently when the engine is at operating temperature. We gurgle after flight then if the oil is on the dipstick flat on the pre-flight then you're good to go.