Check out amigatec.net engine manuals 127.400 & 127.450 for tech data. Yours may have been on a piece of David Bradley farm equipment sold by Sears. I thought the AU7's were used on karts. I have an AU8, it is also missing the govenor/points housing and has an incorrect carb. I have found it difficult to find parts. Points, condensor and carb rebuild kit appear available. I need a Tillotson MT25A carb. If anyone has one please contact me. You can also pm me for other questions. Good Luck, mack