Suzuki DF200/DF225/DF250 V6 4-Stroke Outboards Service Manual, Page 61Get this manual
Quality of the image is intentionally reduced!
PERIODIC MAINTENANCE
4 Start engine and run at idle speedVacuum reading on gauge should be within specificationVacuum specification (idle speed at sea level) 61 71 kPa (457 533 mmHg, 18 21 inHg)