Robin EH12 Service Manual

Unit : mm (in)
1
I
ITEM
EH25
t
STD Lmit
CYLINDER
0 Inside dia.
To be rebored
when the
difference
between max.
and min.
of
diameter
reached to
0.1
(0.004).
75.000 - 75.019
(2.9528
- 2.9535'
STD
I st
reboring
75.250
- 75.269
(2.9626
- 2.9633
Ditto
2nd
reboring
75.500
- 75.51 9
(2.9724
- 2.9732
0 Roundiness after reboring.
0 Cylindricity after reboring.
LESS THAN
0.01
(0.004)
LESS THAN
0.01
5
(0.0006)
PISTON
Piston size (At skirt in thrust
direction)
74.96
- 74.98
(2.951
2 - 2.9520:
74.87
(2.9476)
ST0
75.21 - 75.23
(2.961
0 - 2.961 8:
75.1 2
(2.9575)
1 st o/s
75.46 - 75.48
(2.9709
- 2.971 7)
75.37
(2.9673)
2nd 01s
- 59 -

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