The Hatz 1B50 is a 0.5 L (517 cc, 31.55 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small diesel engine with a horizontal shaft, manufactured by Motorenfabrik Hatz GmbH & Co. KG for general-purpose applications.
The Hatz 1B50 engine has a single-cylinder, direct injection combustion system, light-alloy cylinder head, forged crankshaft, valve timing via rocker arm, pushrods, finger-follower, and camshaft. The Hatz 1B50 engine can be equipped with a recoil or electric starter (12V or 24V) and alternator (14V – 14A at 3,000 rpm; 7A at 1,500 rpm or 28V – 7A at 3,000 rpm or 4A at 1,500 rpm). The engine used pressurized lubrication with a fine filter in the main flow. The 1B50 is equipped with a 5.0 L (1.32 US. gal. 1.1 Imp. gal.) fuel tank.
This diesel engine produced from 5.7 PS (4.2 kW; 5.6 HP) at 1,500 rpm to 11.6 PS (8.5 kW; 11.4 HP) at 3,600 rpm of horsepower (ISO 1585) and 27.4 N·m (2.8 kg·m, 20.2 ft·lb) at 2,500 rpm of peak torque.
General information
| Engine Specifications | |
| Engine model | 1B50 |
| Engine type | 4-stroke, single-cylinder |
| Displacement | 517 cm3, (31.55 cu·in) |
| Max. horsepower | From 5.7 PS (4.2 kW; 5.6 HP) at 1,500 rpm to 11.6 PS (8.5 kW; 11.4 HP) at 3,600 rpm |
| Max. torque | 27.4 N·m (2.8 kg·m, 20.2 ft·lb) at 2,300 rpm |
| Cooling system | Forced air |
| Lubricating system | Pressurized lubrication |
| Fuel system | Direct injection |
| Fuel tank capacity | 5.0 L (1.32 US. gal. 1.1 Imp. gal.) |
| Fuel used | Diesel |
| Starting system | Recoil or electric starter (12 V or 24 V ) |
| Charging system | Alternator |
| Dimensions (L x W X H) | 348 x 392 x 480 mm (13.7 x 15.4 x 18.9 in) |
| Dry weight | With recoil starter: 51.2 kg (112.9 lbs) With electric starter: 56.5 kg (124.6 lbs) |
Cylinder Block and Head
Cylinder bore and piston stroke are 93.0 mm (3.66 in) and 76.0 mm (2.99 in), respectively. Compression ratio rating is 20.5:1.
| Cylinder block | |
| Compression ratio: | 20.5:1 |
| Cylinder bore: | 93.0 mm (3.66 in) |
| Piston stroke: | 76.0 mm (2.99 in) |
| Ring end gap (Top): | 0.250-0.450 mm (0.0098-0.0177 in) |
| Ring end gap (Second): | 0.250-0.450 mm (0.0098-0.0177 in) |
| Ring end gap (Oil): | 0.250-0.450 mm (0.0098-0.0177 in) |
| Crankshaft center distance: | 38 mm (1.495 in) |
| Cylinder head | |
| Valves: | 2 |
Service Data
The API – CF / CH-4, ACEA – B3 / E4 oil for engines without diesel oxidation catalyst (DOC) and a viscosity of SAE 5W-30, 10W-30 is recommended for the 1B50, refilling oil capacity is 1.5 L (1.59 US. qt, 1.32 Imp. qt.). For engines with a diesel oxidation catalyst (DOC) use ACEA E6. The valve clearance is 0.10 mm (0.004 in) for intake valves and 0.10 mm (0.004 in) for exhaust valves.
| Engine | |
| Maximum speed: | 3,600 rpm rpm |
| Valve clearance | |
| Intake valve clearance: | 0.10 mm (0.004 in) |
| Exhaust valve clearance: | 0.10 mm (0.004 in) |
| Oil system | |
| Lubrication system: | Pressurized lubrication |
| Oil type: | With diesel oxidation catalyst (DOC): ACEA E6 Without diesel oxidation catalyst (DOC): CF/CH-4, ACEA: B3/E4 |
| Recommended oil: | SAE 5W-30, 10W-30 |
| Oil capacity: | 1.5 L (1.59 US. qt, 1.32 Imp. qt.) |
| Fuel system | |
| Type: | Direct injection |
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