I am sorry for seeming hateful and i like to have fun as much as the next guy. Realy the question i was asking was what parts will interchange from say a 12hp engine. Im pretty sure mines a 25cube but ill check in a day or two ive been covered up with odd jobs this week. I dont know what the stroke is yet i havent got a chance to measure as ive been so buisy. I didnt mean to make any one mad for the post i was just looking for answers and all it seemed like i was getting was put down instead of that. I proboly would have known that if i would have known those guys better but i dont. that may be my misfortune I dont know. I was having a bad day anyway and when i got around to reading what they had said i took it as a put down. Whether it was or not im sorry. Does anyone know the difference in a horizontal flywheel and a vertical if so what are they ballanced different. Has any one tried to use a kohler carb on a briggs engine i know not all engine from kohler and briggs came with walboros but some did so iwas woundering if you would have to make a flange or would it just bolt up. I was also woundering if anyone tried to convert their engine to an external coil like the kohlers use if so what would you have to do to do this thanks