been running in very dirty water pump to clear. If clay, cement or other similar dirt is left in the pump it may clog the impeller and seal, preventing the pump from working. For some time, let the pump run in clean water or flush it through the exhaust pipe.

not operate the pump without pouring water for pre-pumping, otherwise the pump will overheat. Continuous operation of the pump without water will destroy the gland. If the pump is turned on without water, stop the engine immediately and allow the pump to cool completely before pouring the water for pre-pumping.