I am borrowing a buddies old(early 90's) 36" scag WB. He has not used it in 2 years. He put a new kohler 14HP engine on it 2 years ago. It has been sitting since then. I drained the old gas, refilled with fresh gas, replaced spark plug, and new fuel filter. I can not get it to start. I know it could be anything, but does anyone have any suggestions? Anything that you would check before screwing with the carb? Also, I am wondering about any safety kills switches. Where are they? How many? I saw one, but don't know how it works. It doesn't push in or out. It was on the lower right side, cant remember if it was for the blade lever or brake. Any help would be appreciated.