Hatz 1B27

Hatz 1B27The Hatz 1B27 is a 280 cc, (17.09 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 is equipped with a decompression device, injection pump drive, oil pump with oil pump pressure regulator, valve train system for inlet and outlet valve, governor, speed control lever with governor spring and the multi-functional mechanical control system are integrated into the governor housing. The Hatz 1B27 engine can be equipped with a recoil starter or electric starter motor 12 or 24 Volts.

A 74.0 mm (2.91 in) cylinder bore and 65.0 mm (2.56 in) piston stroke give the 1B27 engine a total of 280 cc (17.09 cu-in) of displacement. Compression ratio rating is 21.5:1. It produced from 2.2 HP (1.6 kW) at 1,600 to 5.4 HP (4.0 kW) at 3,600 rpm of maximum output. The torque is 12.50 N·m (1.3 kg·m, 9.2 ft·lb) at 2,300 rpm.

General information

Engine Specifications
Type4-stroke, single cylinder
Displacement280 cm 3 (17.09 cu-in)
Max. horsepower5.4 HP (4.0 kW) at 3,600 rpm
Max. torque (crank PTO)12.50 N·m (1.3 kg·m, 9.2 ft·lb) at 2,300 rpm
Cooling systemForced-air
Lubricating systemForced spray
Starting systemRecoil starter or electric starter motor
Fuel usedDiesel fuel
Fuel tank capacity3.0 L (0.79 US. gal. 0.66 Imp. gal.)
Fuel consumption
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

Length, mm (in)304 (12.0)
Width, mm (in)361 (14.2)
Height, mm (in)401 (15.8)
Dry weight, kg (lb) With recoil starter: 29.0 (63.9)
With electric starter: 33.8 (74.5)

Service Information

Maximum speed3,600 ± 150 rpm
Valve clearance
Intake valve0.10 mm (0.004 in)
Exhaust valve0.10 mm (0.004 in)
Oil system
Oil typeDiesel oil (API: CF/CH-4, ACEA: B3/E4)
Recommended oilSAE 5W-30, 10W-30
Oil capacity0.9 L (0.95 US. qt, 0.79 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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