Picked up this generator for my cousin for the upcoming hurricane season for $50. Seller said it hadnt ran in 2 years. Im gonna go through it, new oil, air filter etc and teach her how to start and use it and hopefully itll be reliable for years to come. Id like to adjust the valves, my question is, is there any particular process for TDC or 1/4 past TDC? I know it isnt difficult but I havent adjusted valves since my junior year of high school (18 years ago) and that was on a 6-71 Detroit, so Im a tad rusty.