After checking and double checking float bowl adjustment my bowl seemed to run out quickly and the motor would die. I looked at the fuel supply line and repaced the filter with a faster flowing filter. From the tiny metal bead type to a larger paper filter. Same probem, bowl ran dry. Is there supposed to be vents anywhere on the tank that allows for air to replace vacated fuel? I couldn't figure out the gas tank cap to see how. Looks sealed tight to me.