Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Warning in the Manual Proposition 65 Warning Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. CALIFORNIA or Proposition 65 Warning CALIFORNIA en Warnings to Place on Equipment Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Proposition 65 Warning CALIFORNIA Notes