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!
Where the sucker hose connects to the pump, is a check valve. Check valve has to open for soap to be sucked in. Locate the check valve and free it up or replace it. see link below.
Yes, many times it is better to buy a new pump than it is to replace the parts, and wonder if it will work after you are done!