Chainsaw Repair

I have not removed an oil tank on a pm610 but have done a bearcat? Which I believe is a newer 55cc version of this design so it should be similar.  If it's the same you won't have to split the case but a lot of disassembling is required.  I used permatex gasket maker to reseal the one I did.  If you have been lucky enough to not have the oiler feed line break, which was the problem with this one, definitely replace the line while you have it apart as they are impossible, at least to me, to change while the tank is intact.