This year has been particularly challenging as several of our sleds have developed fuel line leaks. Sleds that sat in the barn all summer with half a tank of fuel (that is another story) one night just decide to drain out all their fuel. So far three or four of the sleds have developed these leaks - all from fuel lines that were loose on the fittings. Don't know if we reached the service life limit on these fuel lines or if the unusually cold temperatures have something to do with it. Anyone seeing a similar phenomina?