What parts should I keep on hand ???

Hi all,

Two days ago, I was notified by my oil supplier that because I haven't bought any excessively high priced oil from them recently that they were not going to renew my burner contract. I have been buying oil from their COD division at a cheaper rate than they charge for automatic deliveries—That's not good enough for them as they do not make their fortune as fast. I am also able to find oil on cashheatingoil.com even cheaper than they sell it for. Example—Today's price on their website, CODoil.com is $2.93, on cashheatingoil.com it's $2.64, and if I go with automatic deliveries the price is $3.61—They are ridiculously high. They have also bought out most of the private mom & pop oil companies in the area, as well as one of the longest standing very big oil company—In other words, they are almost a monopoly in this area. A few days before they told me about the burner contract cancellation, I received a renewal in the mail for a ridiculously high price of $609.95—-That's totally & entirely nuts !!!

I have decided to service the burner myself. If I run into a problem, there is a local plumbing & heating guy who serves the local area and helps people who can't solve their problems. I owned 3 service stations for 45 years before I retired and they had a combination of regular oil burners and waste oil burners. I kept them all running for those 45 years without any major problems. My question is, what parts should I keep on hand ??? I figure, a fuel filter, a pump strainer, a nozzle, a set of electrodes, and an electronic ignition transformer. I already have 2 aquastats and a protectorelay. What else is a common failure item for an oil burner ???

Being that my contract expires at the end of this month, I had the overpriced oil company's tech come out and service the burner. He replaced the filter, strainer and nozzle. He put a borescope down the flue pipe to look inside and said the burner is running very clean and he sees no deposit of soot. This boiler (a Weil McLain GO-6) hasn't been vacuumed for 4 years and is still clean inside. He also did a smoke test and came up with zero smoke. So, what else besides what I said above should I keep on hand ???

Thanks,

RON