Mercury Mariner Outboard 40/50/55/60 2-stroke Service Manual, Page 166Get this manual

Mercury Mariner Outboard 40/50/55/60 2-stroke Service Manual, Page 166

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STRATIFIED VS HOMOGENIZED CHARGE DFI engines use stratified charge inside the combustion chamber to aid in reducing emissionsAll other models use homogenized chargeThe difference between the two is: