I removed the B&S today expecting to find cracks to the mounting holes and did on one bolt hole. There appears to have been repairs made to the engine mounting holes in the past. The chain that drives the reel does not have a joining link in it. It had to come off with the top cog. I will need to get hold of a puller to remove the remaining 2 cogs for the rear drive roller and the reel. Sand blast and repair the crack.