Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
You have to use the largest nozzle or it will nt work. If you have correct nozzle, the locate the check valve in the pum, where the soap hose goes int the up. The chedk valve may be stuck, It has to open on th eumps suction stroke, and cose on the pumps pressure stoke. If this does nothappen, no soap is sucked in.