Thanks for that info. That explains how it does its thing, and I will indeed turn it off, in the meantime, when not running. The reason I ask, is that my petcock valve was broken. The spring washer was rusted away, and it leaked badly. I made a temporary fix by replacing the spring steel washer with a neatly fitting O ring, and in compression that ring seems to be doing well enough, and certainly no leaks. However, since I now have it running nicely, I thought I might make good with a new one, especially as that temporary fix may not last that long.The petcock you have will flow without vacuum.....You should turn it to off when not in use. ( that's what the vacuum operated one does automatically)
I believe it is supposed to be a vacuum petcock but it will work without it if the vacuum line for it is blocked off
It still has a fuel pump which is vacuum operated....the carb is above the petcock and will not flow by itself unless the tank is pretty full
Suzuki ATV Parts 2000 LT-F250F OIL PUMP - FUEL PUMP Diagram
There's no doubt in my mind that this is original, so there must be a difference between the UK models and those in the US. According to the VIN mine was an official UK import. If this normally has a vacuum switched valve in the US, somehow mine does not. Anyone who could possibly have been in a position to change it, would have had no clue about capping the vacuum on the carb to make it run properly, so this must be original. It also looked and felt original, and as though it had never been removed, when I took it off to clean and fix it.
Moreover, when you look up the part on my model, it shows a valve with only one pipe, and no vacuum to the carb, and it looks just like mine, so when I clicked on the link I was expecting the right item. I nearly ordered it. Instead I went looking for pictures of that part number, and it's clearly a vacuum switched version, which I'm surmising can't work on mine. I don't know why the parts list shows a picture of mine, and links to a vacuum operated one.
I'm totally guessing, but I suppose I could turn a new one to pri, which must allow fuel to flow freely, but then I would lose the option of switching to reserve if necessary, because I suppose reserve would be vacuum operated.
My question then, regardless of what should be on it, is, does anyone know what none vacuum operated petcock valve will fit my tank, because this is what I would like to fit, even if it was changed and it originally had a vacuum one. I seriously doubt that it was changed though, but even if it was, I would still like to know if there is a normal, or old fashioned one that fits, if anyone might happen to know. The type like mine that just has on/off/res.
Thanks very much for any help.