I just looked after the above post and found the other trimmer with a yellow cover. It seems like it may have a broken connecting rod. I may have a rod in all the parts or a parts motor. The red trimmer, as I said, ran many years back when I shelved it. This is all the collection less the generator and model boat conversion which I will keep. They could be bought at a high price though. . Still for sale and pickup. Offers?