Well spent part of the day tearing down lawn mower and tiller engines,after three i really wondered if its worth the effort.Seems to eat up some time, Might be a faster operation if i had permenate setup for such things,I could keep my pullers and such handy. I did find out something i have wondered about for a while, the gas tank on a lot of the older mowers have a nice chunk of aluminum wrapped in some sheet steel. So i put it real tight in the vice and started with the reciprocating saw,to my suprise the vibration from the saw broke the seem loose quite easily A couple cuts and a couple whacks with the hammer and the steel flew right off.The last mower i did i pulled the tank,the head,the aluminum tube,the coil,might just try to crack the block off with a hammer. anybody got an opinion?