After 2 months of not running I can't get my motor to start. When I first put fresh fuel in it there was a leak around the top of the fuel bowl. Took carb, apart cleaned and checked to see if all parts were working properly . All looked ok. removed the kill swich and taped the end. At this point I was getting fire (checked plug on top of head got spark. Still wouldn't start. Emptied fuel tank,replaced lines and filter added fresh gas, checked wiring and found the conections loose cleaned and tightened the connections tried again to start "no luck" checked wires again appeared to be ok checked again for fire at the plug NO FIRE . Please help