Met with Molly and proceeded to perform a PTU on a 6 section oil fired Weil-McLain boiler. I removed the oil tank filter canister and found it full of sludge and debris. I degreased and cleaned it all out and installed a new filter, gasket and seal. Next, I removed the fuel pump strainer and it was also full of sludge and debris. Both areas uncommonly, extremely dirty and full of sludge. I degreased and scrubbed it cleaned as well. I installed a new pump filter and gasket. Finally, I opened up the combustion chamber and removed the gun assembly. It was extremely dirty and gunked up as well. I degreased, scrubbed clean and replaced the nozzle with a 1.35/80B. I reassembled the unit, restored power and fired up the boiler. I bled the oil lines and observed the boiler run, cycle and reach temperature. All is good at this time. I would recommend a newer more efficient unit. The well tank to the home is undersized as well. I would recommend replacement. Customer was very happy with the serv