Hello all, I could use some help troubleshooting a problem that just arose on my walk behind. I was mowing this evening and started noticing the mower losing power and wanting to die, shut off the mower to check the oil and noticed not only is the oil low, the valve cover on the right side is now cracked and leaking oil. So I have a few questions, what would cause the cover to crack? or is it just a wear and tear thing and I need to just replace the cover? And would low oil cause the mower to lose power? or do I have a bigger issue going on. Thanks so much! I've included pics of the tag on the mower as well as a pic of the valve cover.