I started off with pressure washer electric and petrol just second hand at auctions then since then have had several steam cleaners including a quite powerful three phase one from a council commercial vehicle auction, which I ran from my 10hp phase convertor.When I did work in the motor trade last (which will 20 years, next year) I was the only person who could properly fix the pressure washer we had. To get a company to come in and fix it would take weeks so I just set about doing it myself, which is why I was not to worried about sorting out this boiler, if anything it’s even less complex than a pressure washer. There is a screw for setting the air and another for setting the fuel pressure, I’ve got it running pretty sweet using the colour of the smoke out the exhaust as my guide but going to get a professional in to make sure it is running properly, the service guide has a very specific way of doing it using a CO meter
Often they didn't work when I bought them but I enjoyed the challenge.