General Reference Charts
Manifold Vacuum and Pressure
Manifold Vacuum Absolute Pressure Manifold Vacuum Absolute Pressure
psi psi kPa psi psi kPa
0 14.7 101.3 7‑1/2 7.2 49.6
1/4 14.45 99.6 7‑3/4 6.95 47.9
1/2 14.2 97.9 8 6.7 46.2
3/4 13.95 96.2 8‑1/4 6.45 44.5
1 13.7 94.4 8‑1/2 6.2 42.7
1‑1/4 13.45 92.7 8‑3/4 5.95 41.0
1‑1/2 13.2 91.0 9 5.7 39.3
1‑3/4 12.95 89.3 9‑1/4 5.45 37.6
2 12.7 87.5 9‑1/2 5.2 35.8
2‑1/4 12.45 85.8 9‑3/4 4.95 34.1
2‑1/2 12.2 84.1 10 4.7 32.4
2‑3/4 11.95 82.4 10‑1/4 4.45 30.7
3 11.7 80.6 10‑1/2 4.2 29.0
3‑1/4 11.45 78.9 10‑3/4 3.95 27.2
3‑1/2 11.2 77.2 11 3.7 25.5
3‑3/4 10.95 75.5 11‑1/4 3.45 23.8
4 10.7 73.8 11‑1/2 3.2 22.1
4‑1/4 10.45 72.0 11‑3/4 2.95 20.3
4‑1/2 10.2 70.3 12 2.7 18.6
4‑3/4 9.95 68.6 12‑1/4 2.45 16.9
5 9.7 66.9 12‑1/2 2.2 15.2
5‑1/4 9.45 65.1 12‑3/4 1.95 13.4
5‑1/2 9.2 63.4 13 1.7 11.7
5‑3/4 8.95 61.7 13‑1/4 1.45 10.0
6 8.7 60.0 13‑1/2 1.2 8.3
6‑1/4 8.45 58.2 13‑3/4 0.95 6.5
6‑1/2 8.2 56.5 14 0.7 4.8
6‑3/4 7.95 54.8 14‑1/4 0.45 3.1
7 7.7 53.1 14‑1/2 0.2 1.4
7‑1/4 7.45 51.4
Glossary, Reference Charts, and Conversions
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 1D-5
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