yeah Dan, let me relay what I am running into. The lever is getting loose on the shaft going into the pump. Had two in wheat and it has happened to mine. Makes the engine do weird things. Takes a 10mm I believe to tighten. Some models may have a allen screw I have been told. Also the little hand pumps are beginning to suck air and have caused us some grief when tank gets low. These can be repaired from an injection shop. Get no. off pump and they can order 4 about 35 bucks best I can remember. This is usually a surging problem though.