That actually sounds pretty normal to me. What year is your ski? If it has a carburetor, on it, it is just cold. Mine takes a while to start up if it has been sitting for days. Same thing with my ATV's. If it is fuel injected, then that might be different but it usually takes starting it 3 or 4 times with the choke on before it fires up if it has been sitting more than a day or two without being run.