Electric lawn mower (Hollingwood S43)

Was my late dad's. Not been used for a few years, but I tried it and it works. It's self propelled, you don't push it. Model is Qualcast punch eo30s. What I can see wrong is, there are little flaps to lift and oil it, one is missing and the adjusters to move the blade to the cutter, one is sized. I've oiled it, so it might free up.