What's really needed is a low oil pressure switch. Something that'll shut the engine down before any damage is done.
Yes, That's what the "Oil Sentry" on my old CubCadet lawn tractor with a Kohler engine does (or is supposed to do; I've never actually tried it). It will kill the engine if the oil level is below a certain point. You'd think a real tractor would have such a thing as well. Maybe there is a good reason but you would think they'd be able to engineer something besides a silly light that just tells you it's too late! :thumbdown:
With all the safety shutdown garbage on my old Cub I have fun trying to figure out why when it wont start or stay running. It's nice when all the switches and sensors are working but it's no fun trying to figure it out when one doesn't. :laughing:
Maybe we just need another government agency to check our drain plugs and oil level and make us buy fuel cans that don't let the fuel out! They can call it The Federal Dept of Lubed Rear Ends... :drink: It could be a part of the EPA (aka the Employment Prevention Agency)
Anyways enough jokin, I'll say a prayer for a good outcome for you; and if you DO think it was vandals please check everything else you can think of as well. It'd be odd if that was the only bad thing they did. That's way beyond a prank!
Oh, You may want to look into some type of simple security warning system. Like a couple of motion sensor lights where you store it; or we have a couple of those driveway sensors from harbor freight that work well if you're house is not too far away. We have several out in our yard and if something walks/moves in front of it, it sets off a doorbell like receiver in the house. They're like $15 on sale at Harbor Freight and use a 9v on the transmitter and a couple C batteries in the receiver. Get a couple on the same channel and it will set off the same receiver.
They do have false alarms here and there (wandering deer and such) but it's worth it to know when someone pulls into the drive or is near the barns. Cheap warning if you don't want or have a dog to change peoples minds. At least you'll know they're there! I'm sure they make better ones too if you're more than 100' or whatever the range is.
Again, Good Luck