I have a '78 NC-50. I spent all last winter putting it back together. It took a while to locate a gasket for the Gearcase so I had to be carefull putting it back together. On this ped, you also have to deal with the starter link. All in all it took me about 10 times to get the case put back together. Unfortunately I now find that I can't figure out how to put the oil in. It's supposed to take .7 quart of 10W30 and I can't figure out where to put it in. I know now that I should have put the oil in before I put the cover on but I can't imagin that you need to pull this cove off every time you wish to add oil.