Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 6Get this manual
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SPECIFICATIONS
2.55.0 psi (1735 kPa) 0.059 in(1.5 mm) 0.059 in(1.5 mm) 3.2 USGallons 1300 50 RPM 1100 50 RPM 45005500 12 Turns Out #70
CARBURETOR
Pilot Jet