Hatz 1B20V

Hatz 1B20VThe Hatz 1B20V is a 243 cc, (14.83 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small diesel engine with a vertical shaft, manufactured by Motorenfabrik Hatz GmbH & Co. KG for general-purpose applications.

The Hatz 1B20V engine has a single-cylinder, light-alloy cylinder head, forged crankshaft, valve timing via rocker arm, pushrods, finger-follower, and camshaft. The Hatz 1B20V 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 1B20V is equipped with a 3.0 L (0.79 US. gal. 0.66 Imp. gal.) fuel tank.

This diesel engine produced from 2.2 PS (1.6 kW; 2.1 HP) at 1,500 rpm to 4.8 PS (3.5 kW; 4.7 HP) at 3,600 rpm of horsepower (DIN ISO 1585) and 10.5 N·m (1.1 kg·m, 7.7 ft·lb) at 2,500 rpm of peak torque.

General information

Engine Specifications
Engine model1B20V
Engine type4-stroke, single-cylinder
Displacement243 cm3, (14.83 cu·in)
Max. horsepower From 2.2 PS (1.6 kW; 2.1 HP) at 1,500 rpm
to 4.8 PS (3.5 kW; 4.7 HP) at 3,600 rpm
Max. torque10.5 N·m (1.1 kg·m, 7.7 ft·lb) at 2,500 rpm
Cooling systemForced air
Lubricating systemPressurized lubrication
Fuel systemDirect injection
Fuel tank capacity3.0 L (0.79 US. gal. 0.66 Imp. gal.)
Fuel usedDiesel
Starting systemRecoil or electric starter (12 V or 24 V )
Charging systemAlternator
Dimensions (L x W X H)360 x 399 x 338 mm (14.2 x 15.7 x 13.3 in)
Dry weight With recoil starter: 30.0 kg (66.1 lbs)
With electric starter: 34.8 kg (76.7 lbs)

Cylinder Block and Head

Cylinder bore and piston stroke are 69.0 mm (2.72 in) and 65.0 mm (2.56 in), respectively. Compression ratio rating is 22:1.

Cylinder block
Compression ratio:22:1
Cylinder bore:69.0 mm (2.72 in)
Piston stroke:65.0 mm (2.56 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:32.5 mm (1.28 in)
Cylinder head
Valve arrangement:OHV

Service Data

The API – CF / CH-4, ACEA – B3 / E4 oil with a viscosity of SAE 5W-30, 10W-30 is recommended for the 1B20V, refilling oil capacity is 0.9 L (0.95 US. qt, 0.79 Imp. qt.). The valve clearance is 0.20 mm (0.008 in) for intake valves and 0.20 mm (0.008 in) for exhaust valves.

Maximum speed:3,600 rpm rpm
Valve clearance
Intake valve clearance:0.20 mm (0.008 in)
Exhaust valve clearance:0.20 mm (0.008 in)
Oil system
Lubrication system:Pressurized lubrication
Oil type:API: CF/CH-4, strong>ACEA: B3/E4
Recommended oil:SAE 5W-30, 10W-30
Oil capacity:0.9 L (0.95 US. qt, 0.79 Imp. qt.)
Fuel system
Type:Direct injection
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

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