Back to the old CD 25 R again. Been cranking each year to use, but don't get the chance to go.<br>Carb has been thru 4 times now, and still won't start untill you put a little air pressure on the fuel line after the pump. Then starts and runs well. If you try to restart within 10/15 minutes after shutdown, it will. Wait an hour and you have to start over again. It is really hard to push gas up to engine with primer bulb.Is it possible it is blockage in fuel pump?