It's been bitter cold here, more than 20 below (windshield wiper fluid froze) but with a new battery, my 2510 has been starting just fine. I probably haven't let it warm up enough though. This a.m. it started and I started down the steep hill to the barn. A 100 feet or so and it made a sound (thunk? slip? snap?) and quit. And that's that! I added fuel, just in case. It cranks but won't start. Battery is fine. I looked at the engine oil dipstick and there seems gunk in it but not metal gunk. I don't think it was there last week. Am I looking at a new engine? Anything simpler I can pray for? A neighbor is coming over Sunday to check belts and such. But I'm a $250 tow ride away from a shop.