This chainsaw is an oldy but a goody, it has a bit of weight to it as it's the older style all aluminium and metal body not the plastic ones. This is by far one of the best chainsaws I have used as it's got plenty of power and the weight behind it makes it solid on large trees and cuts with ease. I haven't pulled the oiler pump out yet as I have never worked on one of these before and would prefer someones knowledge or a service manual as I guessed parts are obsolete and care would be needed not to damage anything else to try and repair the problem. Any idea AVB what could be the issue with the oil disappearing quick, most of the problems I read online are that the oil won't self prime, could it be as easy as an O ring or some kind of seal. I have attached a picture below of the I'd plate if that helps, and would really love to get it working properly as it starts with no problem and has no other issues.