1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 144Get this manual

1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 144

EMISSIONS
Stratified vsHomogenized 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:

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