We have a Yale LP truck which has healthy spark but won't fire. I found that pressure was making it into the regulator, but little to none coming out of the larger hose going from the regulator to the mixer (carb). I tore apart the Aisan regulator and inspected it. The diaphragms were both good. There were two valves, one barrel shaped with a triangular shaped spring behind the back diaphragm, one on an armature. The one on the armature was just fine, however the barrel shaped valve had cracked and broken rubber seal. My question is this...does anyone know if that bad barrel shaped valve (with the triangle shaped spring) would cause a lack of fuel pressure going to the carb? I am used to an excess of pressure when a regulator fails. I already ordered the diaphragm and valve kit, I am just trying to decide if I should replace the top solenoid and the fuel lockoff solenoid on the regulator as well.

Thanks for reading!

Thanks for reading!