6
MS 780, MS 880
3.
Specifications
3.1
Engine
MS 780
MS 880
Displacement:
121.6 cm
3
121.6 cm
3
Bore:
60 mm
60 mm
Stroke:
43 mm
43 mm
Engine power to ISO 7293:
5.6 kW (7.8 bhp)
at 8,000 rpm
6.4 kW (8.7 bhp)
at 8,500 rpm
Maximum permissible engine speed
with bar and chain:
11,000 rpm
11,000 rpm
Idle speed:
2,700 rpm
2,700 rpm
Clutch:
Centrifugal, without linings
Centrifugal, without linings
Clutch engages at:
3,400 rpm
3,400 rpm
Crankcase leakage test
at gauge pressure:
0.5 bar
0.5 bar
under vacuum:
0.5 bar
0.5 bar
3.2
Fuel System
Carburetor leakage test at
gauge pressure:
0.8 bar
Operation of tank vent at
gauge pressure:
0.5 bar
Fuel:
as in instruction manual
3.3
Ignition System
Air gap between ignition
module and fanwheel:
0.20...0.30 mm
Spark plug (suppressed):
NGK BPMR 7 A
Electrode gap:
0.5 mm
3.4
Chain Lubrication
Speed-controlled oil pump with reciprocating piston and
manual flow control
Oil delivery rate:
Adjustable oil pump
Ematic position
at 10,000 rpm
14.0...36.0 (+/- 5.0) cm
3
/min
21.0 (+/- 3.0) cm
3
/min
Special accessory
Oil delivery rate:
Oil pump with increased
delivery rate:
(oil delivery rate is not
adjustable)
at 10,000 rpm
50.0 (+/- 5.0) cm
3
/min
