Hi all, I have a very slow oil drip from the bottom of my riello 40 burner. It makes a small stain on the floor, so would like to clean it up if possible. I opened the cover to take a quick look, and noticed a slight film of oil on the blower cage. There is at least one other thread on here where the nozzle was missing a washer (I assume a compression washer) that was the problem, but before I go tearing into it I thought I would ask advice. Easy enough to take pictures if you like - just tell me what you want pictures of (the outside of a burner box is not all that interesting.....) Recommendations on next steps?

so i have been reading lot in this forum and believe i might be in the right place. I have been upgrading my own heating system for several years now and think its time i delve into the burner side of things. I have a very complex hydronic heating system that is in a really old victorian house on long island. Basically it a 12 zone combnation of cast iron radiators and baseboard and radiant. Many maifolds and zone valves and circulators. Did a lot of research and am pretty happy wih the hyronic side of things. The burner is a Burhnam V7 with a RIELLO F5. Ok so heres the thing recently one of the fuel lines lossened and it got a small air leak. I think after to much priming before i discovered the leak the oil pump might have been damaged. It has started to make a unusal sound Kinda like it has spun a bearing or something. At the same time i feel like im burnng a exsessive amount of fuel. This leads me to the point that maybe its time I learned how to set up my burner myself and things like repairing or replacing the oil pump. Over the years have used many people to do it. Some come to clean the boiler an do a marginal job of vacuming and just change the nozzle. So it is time for me to learn how it should be done My question is what is the best resource for the tools that i will need and basic knowledge to get started. Look foward to some input. Thanks