LRT, no point in buying a motor to store away, you can rebuild a 2 stroke Victa for a few pennies, so if you really felt the need rebuild a few and you will have plenty of motors stored away to see your days out. Problem is by the time people who really need a 2 stroke will not know they are not available till it is too late. The problem with using a dry sump motor in a small engine is that it requires 2 oil pumps a scavenge pump to pull the oil back from the sump and a feed pump to pump the oil back to the big end, which then drops to the bottom of the sump, splashed over the bore and bearings and then picked up by the scavenge pump to go the cycle again. Far too complex for a mower or whipper snipper. I know a few are claiming 4 stroke whipper snippers but as AVB said recently they are seeing them now coming into the shop, suffering oil starvation resulting in terminal damage
