1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 143Get this manual

1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 143

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