Description
The Koshin STH-50X (code 050-028) is a 2″ semi-trash petrol pump driven by a Honda GX120 four-stroke engine. Koshin rates it at up to 600 litres per minute and 29 metres of head, with a maximum suction lift of 8 metres, and it passes solids up to 8 mm. At 23 kg it is the pump to grab for trench dewatering, small excavations and clearing flooded ground.
If you need to move more water or the water carries slightly larger grit, the 3″ Koshin STH-80X pumps up to 900 l/min and passes solids up to 9 mm. For clean water jobs such as irrigation, the Koshin SEH-50X is the clear water equivalent.
Koshin casts the impeller and casing in spheroidal graphite iron and fits a silicon carbide (SiC) mechanical seal, which Koshin rates as four to five times more durable than a standard carbon and ceramic seal. A long bolt assembly holds the pump body together, and the impeller can be removed without special tools, making it straightforward to clear a blockage or change wear parts. The Honda GX120 runs on unleaded petrol from a 2.0 litre tank, giving about two hours of running, and starts with a recoil starter. The pump has 2″ BSP male threaded connections and measures 500 x 395 x 415 mm (L x W x H) inside its tubular frame.
Features
- Honda GX120 four-stroke petrol engine
- Up to 600 l/min and 29 m head
- Handles solids up to 8 mm
- Maximum suction lift of 8 m
- Spheroidal graphite iron impeller and casing
- Silicon carbide mechanical seal
- Impeller removable without special tools
- 2″ BSP male connections; 23 kg net
Applications
- Dewatering trenches, footings and small excavations
- Pumping out flooded gardens, cellars and low ground
- Emptying ponds, ditches and soakaways
- Moving sandy or muddy water on farms and building sites
The STH is a semi-trash pump for sandy and muddy water. It is not suitable for sewage, thick slurry, rags or debris larger than its solids rating: for bigger solids, see the Koshin KTH compact trash pumps, and for clean water work, the Koshin SEH range. Fill the casing with water before starting and never run the pump dry. Do not use it for petrol, oil or other flammable liquids. Koshin supplies the pump with a strainer, two hose couplings, three hose bands, an engine tool set and a spanner; hoses are not included.
The Koshin STH range
| Model | Connections | Engine | Max flow (l/min) | Max head (m) | Max solids (mm) | Fuel tank (L) | Run time per tank | Net weight (kg) |
|---|---|---|---|---|---|---|---|---|
| STH-50X | 2″ | Honda GX120 | 600 | 29 | 8 | 2.0 | About 2 hours | 23 |
| STH-80X | 3″ | Honda GX160 | 900 | 26 | 9 | 3.1 | About 2 hours | 29 |
Figures are from Koshin’s catalogue. Both models have a maximum suction lift of 8 m. See the Koshin STH semi-trash Honda petrol pumps range page for help choosing and answers to common questions.
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