I have a 10591 Lawnboy M series with the Fresh Lube oil injection. It needs a check valave, and I plan on using this mower regularly, so I was just going to disable the Fresh Lube and run it on premix. For some reason, I would feel better running it on premix knowing it's getting the right lubrication. I've heard of guys taking the pump and all off, but couldn't I just empty the oil tank out and disconnect the oil level sensor? Thanks for any help.