Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 104Get this manual

Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 104

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3 Remove screws, cover, and diaphragm 3 Inspect needle valve for grooves and replace if necesary
5 Inspect diaphragm for damage and replace if necessary

NOTE: Use petroleum based so