Well. having bought my two 3813 tractors some 2 years ago I took the engine from the one that was in poor shape and swapped it to the one that had a broken rod and ( hole in block) but was in good physical shape and have since restored that tractor . I left the carcass of the old in my garage for some time and decided to strip it down to bare frame today. I removed the transmission( known working) every thing associated with the trans as well as all the electrical harnesses that run to front of engine. I got alot of spare parts for a 3813 if somone needs something thats keeping them from using their mower. This mower did not have a deck, so I dont have any of those parts.