anyone have any info on the techumpseh TVS90 431208C SER 2161B engines ? they are the old vertical pull ones with a flat top cowling and the rectangular air filter box. the fuel tank has the pull start handle mounted in the middle of it with the fuel cap at the front and the oil sip stick at the far back.i know they were on rover mowers of the time (i had one with a red engine and a blue base for my first mower (sadly long dead). i now have 2 of them and dont know much about them at all. i also have access to another 2 if i want them but will have to think on it, although they are great little engines in my opinion. the first lawn mower i started to tinker on and fix had one of these engines so it has a bit of a place in my heart if you know what i mean.
any info, even if you have owned one in the past and have something to say about it will be appreciated.
thanks
regards jay