1991 Johnson Fastrike model J150GLEI rebuilt carbs did linc and sync ,new gas line changed water separator still stalling after it 1st run which is good 5500 at 61.8 mph let it sit and stalls at least 3 times before it'llcatch and go seem to me like the fuel bulb is a little on the soft side but pumped it hard and didn't make a differnce it still stalled where do i go from here nee help?