ok i have been tracking down this very bad gas smell for awhile it only happens when the tank is full the tank is new and all the grommets are new i was checking the cansiter today and noticed that gas was in the vent line it was dark brown and smelled very bad took down the canister and could hear very little charchol moving inside then i turned it upside down and it started to fall out of the vent holes i got no fluid to fall out i cant find anything online about it any help would be great