Hey everyone, My 18hp Briggs I/C engine blew a sump gasket, and being the handy type I decided to fix it myself. Got the engine off okay, unbolted the lower case, and when the two pieces came apart, a couple pieces came out and I didn't see where they came from. One is a little gear with what looks like 2 hinged arms on it. I'm pretty sure it sits on a shaft on the lower case and interfaces with a larger gear in the upper half. Then there is a little sleeve-looking thing that looks like it fits inside the 2 arms, and also slides onto the same shaft as the little gear with 2 arms. I've got lawns to mow and I've got to get this back together! Thanks in advance for the help!