Thank you for your answer, but actually, I have the LSN as rich as I can, at 3 to 4 turns. I cannot opent it more. When I have tried to adjust it, I closed it to two turns, but less than two turns, the engine stalls, so I left it 2 to 3 turns. Therefore, I have a rich LSN, and a rich HSN, but the engine still gets very warm. An even if I accelerate the engine, I dont see any oil coming out from the exaust. Does someone has any suggestions?