![]() The vaseline works on the same principle as when wetting the lips of a suction cup increases the holding power and will stay there until you start the engine. Make sure to lubricate the impeller with any greasy paste including Vaseline to prevent the dry run failure and to increase the vacuum creation. It will move also the air and will create a vacuum like a bicycle pump. ![]() The sea water pump on the other hand has a rubber impeller inside that touches the housing and moves volumes (is volumetric pump that moves a specified volume of fluid on every revolution turned). The Conclusion to how to re-build a water pump, install new hoses and clamps and Belts on a Yanmar 2gm.Will she Pump Water Again. If there is no heavy liquid in the pump there is no pressure. These pumps use the centrifugal force of the liquid to move it. The coolant pump is a normal centrifugal pump used in any diesel or gas engine. To open the lid I have to turn off the sea cock. ![]() At least in my boat the sea water filter is under the floor and the waterline is 16 cm over the floor, so the filter is under the waterline. ![]()
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