EMISSIONS
Page 3C-4 90-857046R1 NOVEMBER 2001
STRATIFIED VS HOMOGENIZED CHARGE
DFI engines use a stratified charge inside the combustion chamber to aid in reducing emis-
sions. All other models use a homogenized charge. The difference between the two is:
Homogenized Charge
A homogenized charge has the fuel/air particles mixed evenly throughout the cylinder. This
mixing occurs inside the carburetor venturi, reed blocks and crankcase. Additional mixing
occurs as the fuel is forced through the transfer system into the cylinder. The homogenized
charge is easy to ignite as the air/fuel ratio is approximately 14.7:1.
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