I have a 40 gallon parts washer from HF. I'm on my second pump but I've used it a number of years. The solvent (kero, diesel, mineral spirits, Jet-A or whatever) will settle out eventually. I drain out the dirty solvent after stirring everything up real well and brushing the bottom to get everything into solution. I put the five gallon pails (usually 2) up high somewhere and leave them be for several weeks. I then put my small siphon hose (small so not to create too much suction) into them and drain them back down into my tank to add to the new solvent I put in there in the meantime. I tie wrap the siphon hose to a metal rod about 2 or 3 inches above the bottom of the pail so as not to suck the crap out. The solvent will turn clear in a few weeks of setting. The remaining solvent and crud is accelerant for my next brush pile. Or I put it in the wood burner if it's that time of year. I usually clean my parts washer out every two or three years. I use the Jet-A because it has a lot less smell than diesel even though it is slightly more cost. It's also not as "oily" but does get that way over time from the grease it dissolves off of stuff. I clean a lot of stuff besides chainsaws. In fact, if I only did saws, I wouldn't need a parts washer, I'd just use a five gallon pail to lower stuff into for soaking and use a large drain pan (the kind for transmission servicing) to brush parts with solvent in. Then dump it all back into the pail and put on a lid.
