
How Does a Self-Priming Water Pump Work, and Why Does It Still Need Water?
A self-priming centrifugal water pump uses
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A self-priming centrifugal water pump uses

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This comprehensive guide breaks down the
| Model | S28D |
| Type | Air-cooled,4-cycle,single cylinder,side valve |
| Bore*Stroke(mm) | 75*62 |
| Displacement (cc) | 273 |
| Rated output kW (hp)/rpm | 4.2(5.7)/3600 |
| Max output kW (hp)/rpm | 5.91(8.0)/4000 |
| Direction of rotation | Counterclockwise, facing PTO shaft |
| Fuel | Automobile Gasoline unleaded |
| Fuel tank capacity (L) | 5.5 |
| Lubricating oil capacity (L) | 0.85 |
| Spark Plug | E6TC |
| Starting system | Recoil starter |
| Packing size (mm) | 440*380*460 |
| Net weight | 21.5 |