Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 116Get this manual

Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 116

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Inspection 1 Inspect needle and pi ston valveReplace if worn or damaged
55833 Plug

bPilot Jet

Electrothermal Valve Resistance

cMain Jet 7 Remove cover