Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 103Get this manual

Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 103

EMISSIONS
STRATIFIED VS HOMOGENIZED CHARGE
At certain operating conditions, DFI engines use stratified charge inside the combustion chamber to aid in reducing emissionsAll other models exclusively use homogenized chargeThe difference between the two is:

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