I have been working on a 3 burner NG steam table. Initial call was due to employee losing his eyebrows while re-lighting a standing pilot.They turned the gas supply off . I turned it on and re-lit the pilots. Turned the burners on high, one by one and they all lit on the pilot side and took from 10-40 secs before lighting all the way around,could smell the gas.Manifold at 5"W.C. Installed second regulator as per mfg. to reduce manifold to 4". Same results.Turned on low they lit all the way around almost instantly. Was told to instruct employees to start w/low fire.Sound right?