Applications:
– Irrigation with sprinkler systems
– Fire fighting
– Move large quantity over long distances
– Rice field irrigation
• Gardening / orchard cultivation
– Pump water from well
• Filling water reservoirs
• Filling or draining water from ponds
• Filling or draining water from fish farms
– Washing livestock, barns or farm equipment
– Process water with solid particles up to 3 mm
The Koshin SERH-50Z petrol motor pump with a head of 90 metres is used for firefighting and supplying clean water over long distances; It is equipped with a powerful Honda GX200 Hi-Revolution engine, which is characterised by its economical fuel consumption.
New alloy elements: Silumin housing and impeller with high chrome content guarantee a long service life.
Features:
- Economical Honda GX200 Hi-Revolution engine;
- Low weight and small dimensions;
- The tubular steel frame protects the motor from damage and makes the Koshin SERH-50Z easy to transport;
- Strong suction power;
- Wide fuel tank neck;
- Low noise level;
- 3.1-litre fuel tank for continuous operation without refilling;
- Graphite/ceramic mechanical seal;
- Utilising the latest technology and wear-resistant materials developed in Japan;
- Long service life without loss of performance;
- Simple and easy commissioning without pre-filling the suction hose with water, simply fill the pump housing with water.
Performance Curve:

Documentation:
* This link leads to the parts list of the model SERH-50Z-BAA. If the complete designation of your pump model differs from this, please ask us for the correct parts list via our contact form.
Technical information:
Connection | ON: 50 mm (2″); OFF: 50 mm (2″) / 25 mm (1″) x 2 |
Connection type | Outer pipe thread |
Total head | 90 m |
Delivery quantity | 500 L/min |
Max. Suction height | 8 m |
Grain size | Max. 3 mm |
Motor type | 4-stroke gasoline engine, air-cooled |
Motor | Honda GX200HR |
Cubic Capacity | 196 ccm |
Rated power | 3.7 kW (5.0 PS) / 3600 rpm |
Max. Power | 4.5 kW (6.1 PS) / 4000 rpm |
Fuel | Gasoline, unleaded |
Capacity of the fuel tank | 3.1 L |
Continuous operating time | Approx. 1 hour. |
Start method | Cable starter |
Standard accessories | 1 Filter 3 hose clamps (φ 60) 2 hose clamps (φ 32) 1 hose coupling set (50 mm) 1 closing plate (50 mm) 2 nipples (25 mm) 1 quick coupling (25 mm) (*only BSP model) 1 Power tool |
Net weight | 34,6 kg |
Gross weight | 37.6 kg |
Dimensions L×W×H (cm) | 57 × 45 × 46.8 |
Performance:
A – Feed,
B – head,
C – Suction

*Performance may vary depending on conditions