Mercury Optimax 115, 135, 150, 175, DFI year 2000 and up service manual., Page 265Get this manual

Mercury Optimax 115, 135, 150, 175, DFI year 2000 and up service manual., Page 265

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EMISSIONS
Controlling Emissions
There are two principle methods of reducing emissions from two-stroke-cycle marine engineThe first method is to control the airfuel ratio that goes into the