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1Technicaldata
output
2.5 hp at 9000 rev/rein.
Bore
40 mm (1.575")
Stroke
32 mm (1.260")
Displacement
40 cc (2.44 in3)
Ignition system
MD1-1
Ignition advance
24-27°
Sparking plug
Bosch WkA 225 T36 or Champion CJ 7 Y
Spark gap
0.5 mm (0.02")
Contact breaker gap
0.3-0.4 mm (0.012-0.016")
Carburetor
Walbro HDC-10
Fuel tank capacity
0.5 Iitre (7/8 Imp.pint = 1 US pint)
Oil tank capacity
0.25 Iitre (3/8 Imp.pint = 1/2 US pint)
Oil pump capacity
5 cc per minute at 6000 rev/rein.
Chain lubrication
Automatic
Chain speed
17.4 metres (57 ft) per minute (at 9000 rev/rein)
Sawing chain
Pitch 0.325"; driving link thickness 1.47 mm (0.058")
Crankshaft bearing, drive side
SKF 6201 – 2 RS l/C3
Crankshaft bearing, magneto side SKF 6201/-C3
Gudgeon pin bearing
KBK 10x13 x14.5
Big-end bearing
KZK 12x16x1O
Needle bearing for clutch drum
Torrington B78 or equivalent
Measurement table for piston and cylinder
Class
Cylinder diam.
Piston diam.
in.
in.
A
3:.:8
1.5736"
3:.:5
1.5724"
B
39.99
1.5740"
39.96
1.5728"
c
40.00
1.5750"
39.97
1.5732"
D
40.01
1.5754"
39.98
1.5736"
E
40.02
1.5758"
39.99
1.5740"
Lubrication directions
Engine
4 % oil admixture of two-stroke oil. 5
Y.
oil admixture
with ready-mixed two-stroke oil
Chain
Special chain lubricating oil with good adhesion pro-
perties and a high viscosity index.
Clutch bearing
Mobilgrease MP or equivalent
Starting device
Mobilgrease BRB Zero or equivalent
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