Robin EH12 Service Manual

I Et125
Model
EH25B EH25BS EH25D EH25DS
TY Pe
1 Air-Cooled, 4-Cycle, Single-Cylinder, Horizontal P.T.O. Shaft, Gasoline Engine
Bore
X Stroke
75
X 57 mm (2.95 x 2.24 in.)
Piston Displacement
251 cc (15.31 cu.in.)
Compression Ratio
8.5
Output
Max. Torque
3.38 I1 300 kgWrpm 1.69 / 2600 kg-mlrpm
Continuous 8.5/2000 HP/rpm 8.5/4000 HP/rprn
Max. 5.5/1500 HP/rpm 6.411800 HP/rpm 5.5/3000 HP/rpm 6.4/3600 HP/rpm
Direction
of Rotation Counterclockwise As Viewd From P.T.O. Shaft Side
Cooling system Forced Air Cooling
Valve Arrangement Overhead Valve
Lubrication Splash Type
Lubricant Automobile Oil
SAE #20, #30 or 1 OW-30
Capacity
of Lubricant 1 .O liters (0.26 U.S. gal.)
Carburetor Horizontal Draft, Float Type
Fuel
Automobile Gasoline
Fuel Consumption Rate
230 gr/HP-h At Continuous Rated Output
Fuel Feed System
Gravity Type
Fuel Tank Capacity
6.0 liters (1
59 US. gal.)
Ignition System
Flywheel Magneto (Solid State)
Spark Plug
NGK B6HS
Charging Capacity
- 12V - 1.3A - 12V - 1.3A
Starting System
~~~ ~~
Recoil and Electric
Starter
Recoil Starter
~~ ~~_____
Recoil Starter
Recoil and Electric
Speed Reduction 2:l Cam Shaft Drive
-
Governor System Centrifugal Flyweight System
Dry Weight 24.5 kg (53.9
Ib.) 28.5 kg (62.7 Ib.) 24.0 kg (52.8 Ib.) 28.0 kg (61.6 Ib.)
Length 360rnm (14.17in.)
360mrn (14.17in.)
360rnm (14.17in.)
360mm(l4.17in.)
Dimensions
Width
385mm (15.15in.)
405mm (15.94in.)
385mm (15.15in.)
405mrn (15.94in.)
Height
440mm (17.32in.) 440rnm (17.32in.)
440mm (17.32in.)
440mm (17.32in.)
I-
-3-

Robin EH12 Specifications

General

Ignition System	Transistorized magneto ignition
Starting System	Recoil starter
Bore x Stroke	60 mm (2.36 in) x 43 mm (1.69 in)
Max Output	3.6 kW (4.8 HP) at 3, 600 rpm
Engine Type	4-Cycle, Air cooled, Single cylinder, OHV