Hatz 1B50

Hatz 1B50The Hatz 1B50 is a 517 cc, (31.5 cu-in) single-cylinder air-cooled 4-stroke internal combustion diesel engine with a horizontal shaft, manufactured by Motorenfabrik Hatz GmbH & Co. KG for general-purpose applications.

This engine has a single-cylinder, overhead valves, and direct injection fuel system. The Hatz 1B50 engine can be equipped with a recoil starter or electric starter motor 12 or 24 Volts.

A 93.0 mm (3.66 in) cylinder bore and 76.0 mm (2.99 in) piston stroke give the 1B50 engine a total of 517 cc, (31.5 cu-in) of displacement. The compression ratio is 20.5:1. It produced from 55.7 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 maximum output. The torque is 27.4 N·m (2.8 kg·m, 20.2 ft·lb) at 2,500 rpm.

General information

Engine Specifications
Model 1B50
Type 4-stroke, single cylinder
Displacement 517 cm 3 (31.5 cu-in)
Max. horsepower 11.6 PS (8.5 kW; 11.4 HP) at 3,600 rpm
Max. torque (crank PTO) 27.4 N·m (2.8 kg·m, 20.2 ft·lb) at 2,500 rpm
Cooling system Forced-air
Lubricating system Forced spray
Starting system Recoil or electric starter motor
Fuel used Diesel fuel
Fuel tank capacity 5.0 L (1.32 US. gal. 1.1 Imp. gal.)
Fuel consumption
PTO shaft rotation Counterclockwise (from PTO shaft side)

Dimensions and Weight

Length, mm (in) 348 (13.7)
Width, mm (in) 392 (15.4)
Height, mm (in) 480 (18.9)
Dry weight, kg (lb) With recoil starter: 51.2 (112.9)
With electric starter: 56.5 (124.6)

Service Information

Maximum speed 3,600 ± 150 rpm
Valve clearance
Intake valve 0.10 mm (0.004 in)
Exhaust valve 0.10 mm (0.004 in)
Oil system
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.)
Oil pressure
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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1 Comment

  1. Hi, It would be very useful if you could include the dimensions for the output/PTO shafts
    for these engines. I’m interested in the Hatz 1B50. Thanks. Michael.

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