well i got the engine out and opened up the bottom end first. rod is toast. all kinds of galled aluminum on the crank. as you can see in the pic the hole is twords the cam. the only think i can think of is that the nuts loosened up. i torqued them to kohlers spec for new posi-lock rods. when i got the crank and rod back from the machineshop the rod was installed on the crank. now im wondering if they torqued them there too and if i should have used the "used" torque value. they make it a point in the manual that says do not over torque, loosen and retorque the posi lock rods. im pretty sure my cylinder will need to be rebored to .030 now. there are lots of score marks where aluminum got onto the skirt and scored my walls. most are not bad but i think its more than a kiss from a hone will take out. there are quite a few that are below the crosshatch. i know kohler doesnt do a .020 under rod but i found one on the net
http://shop.kustomlawnandgarden.com/...-NEW-ROD21.htm and there is one on ebay too. dont know about how good these rods are though, better than mine for sure. id hate to buy a rod just to put bearings in it.