Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 8Get this manual
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SPECIFICATIONS
VALVE SPRING
Compressed Pressure (Installed) Intake Exhaust
& Exhaust)
19.822.0 Ibs(9.010.0 kg) 19.822.0 Ibs(9.010.0 kg) _ Left Hand 0.004 i