Robin EH12 Service Manual

Unit: mm (in)
T
EH25
ITEM
Ring groove side clearance
STD Limit
0.050 - 0.090
(0.0020 - 0.0035)
0.1
5
(0.006)
0.030 - 0.070
(0.001 2 - 0.0028)
0.1 5
(0.006)
t
2nd
0.01 0 - 0.065
(0.0004 - 0.0026)
0.15
(0.006)
Oil ring
Piston pin hole
m
17.991 - 18.002
(0.7083
- 0.7087)
18.035
(0.71
00)
e Piston pin outside dia.
17.992
- 18.000
(0.7084
- 0.7087)
17.960
(0.7071)
0 Clearance between piston and
cylinder at skirt area.
0.025 - 0.064
(0.0001 - 0.0025)
0.25
(0.01 0)
0 Piston ring end gap
TOP
2n d
0.1 -0.3
(0.004 - 0.01 2)
1.5
(0.0591)
0.1 - 0.3
(0.004 - 0.01 2)
1.5
(0.0591 )
oil ring
- 61 -

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