I have an ancient (about 1978) Victa with Briggs & Stratton 3.5 hp engine. I don't like tipping the oil out as a way to change the oil because I end up with oil in the muffler and it takes a while to get things settled down again. My new trick is to put the mower up on blocks, remove the cutting disk by unscrewing the central bolt, and taking out the oil drain plug by using a home-make tool consisting of two half inch drive sockets welded back to back. However when I did that, the next time I mowed the lawn the cutting disk came loose. Not sure if I put the bits back on in the wrong sequence, or just didn't torque up the central bolt sufficiently. Can someone tell me the assembly sequence please? I put the disk on first, so it will centralise on the spigot, then the special washer with the X-shaped cut out to engage with the matching X on the end of the crankshaft, then the flat washer to flatten out the X-washer. The X-washer is a Belleville type: it is dished and made from spring steel. I put it on hollow-side up. Was I right or wrong?
