A/C '97 Z 440 Gas Leak

Hi, I just got an A/C z 440 I recently from my neighbor. I am new to snowmobiles and just need some advice. I noticed that some fuel drips from the bottom of the sled after it has been running. Not much but it is noticeable. I checked all of the fuel lines and am unable to find any noticeable leaks. Like I said I am new to snowmobiles and am looking for some advice/solution. Thanks

A/C '97 Z 440 Gas Leak