I need some help from you David Bradley guys. I just picked up a Sears 500 Briggs NP, and I would like to know what it was used on. The PTO end of the crankshaft is very strange, and I looked up the type no. in my Briggs book, and found a crankshaft part no. for it, but it was only used on just this type no., so this was biult for a very specific application. I doubt this was used on a DB walk behind, as it doesn't have a mechanicle governor, but since it is a Sears engine, I figure it was used on a DB something? The engine was manufactured in 1949 if this helps any. I appreciate any info.