Hatz 1B27

The 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
Model	1B27
Type	4-stroke, single cylinder
Displacement	280 cm 3 (17.09 cu-in)
Max. horsepower	5.4 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 system	Forced-air
Lubricating system	Forced spray
Starting system	Recoil starter or electric starter motor
Fuel used	Diesel fuel
Fuel tank capacity	3.0 L (0.79 US. gal. 0.66 Imp. gal.)
Fuel consumption	–
PTO shaft rotation	Counterclockwise (from PTO shaft side)

Dimensions and Weight

1B27
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

Engine
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	Diesel oil (API: CF/CH-4, ACEA: B3/E4)
Recommended oil	SAE 5W-30, 10W-30
Oil capacity	0.9 L (0.95 US. qt, 0.79 Imp. qt.)
Oil pressure	–