Fuel shutoff on my 2016 Rancher 420?

Good morning, all.

I have a Rancher 420 that I bought used three months ago. Long story; bought it at wife’s urging to help out a family friend while also getting a more suitable snow removal machine for our 500′ driveway. If it hadn’t been for the family friend tie, may not have bought it, certainly not at the price I did.

The machine had 26 hours and 153 miles on it when I bought it. Has 31.5 hours now. I only use it on our acreage for chores, so hours is going to be the real measure of use.

The machine was relatively clean when I looked at it to buy. However, there was dried mud to be seen when I picked it up.

I had it on the to-do list to go over the machine very closely, and I did that yesterday. I was concerned that the family friends ex-boyfriend had abused the machine and found evidence of that. The air box was full of oily water to the bottom of the air filter. There was evidence of deep water on top of the engine.

I put a new air filter on it and changed engine oil and gear oil in differentials. The engine looked OK, but the differential oils had a milky green appearance. I don’t know if that’s just the characteristic of hypoid oils or not. Anyway, that’s all now fresh.

The machine now shifts much more smoothly than before the oil change. I suspect that (insert moniker here) ex-boyfriend changed the oil and put in regular 30W oil instead of ATV-spec oil suitable for the wet clutch.

I want to completely drain the fuel tank and put fresh in. I don’t see any mention of fuel filter or shutoff in the owner’s manual. My initial inspection of the mechanicals yesterday didn’t lead me to any obvious way to easily drain the fuel.

This machine will always be low-hour machine, and so how much fuel I use will depend on how much snow we get this winter. I don’t want to let a lot of old fuel just sit in the tank.

How do I get the fuel out of this machine? Similarly, if there’s womething you would do to this machine given what I know about it, what would that be?

Thanks in advance.