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8 – English
Displacement Bore Stroke Max. power at
Bar length Chain speed Chain pitch Drive link gauge
Spark plug gap Ignition system Air gap Carburettor
cm
3
mm mm r/min
mm/inches mm/inches
cm/inches m/s inches mm/inches
TECHNICAL DATA
55 53 46.0 32.0 9000
61 62 48.0 34.0 8300
242XP 42 42.0 30.0 9900
246 46 44.0 30.0 9000
254XP 54 45.0 34.0 9300
257 57 46.0 34.0 9000
55 0.5/ .02 ELECTROLUX ET 0.3/ .012 WALBRO WT 170
61 0.5/ .02 ELECTROLUX ET 0.3/ .012 TILLOTSON HS 254
242XP 0.5/ .02 SEM AM 7 0.3/ .012 WALBRO HDA 98
246 0.5/ .02 SEM AM 7 0.3/ .012 WALBRO HDA 98
254XP 0.5/ .02 ELECTROLUX ET 0.3/ .012 WALBRO HDA 35B
257 0.5/ .02 ELECTROLUX ET 0.3/ .012 WALBRO HDA 120
55 38-51/15-20 17.4/9000 rpm .325-3/8 1.5/ .058 / 1.3/ .050
1)
61 38-51/15-20 18.4/8300 rpm 3/8 1.5/ .058
242XP 28-46/11-18 19.1/9900 rpm .325 1.5/ .058 / 1.3/ .050
1)
246 28-46/11-18 17.3/9000 rpm .325 1.5/ .058 / 1.3/ .050
1)
254XP 33-51/13-20 17.3/9300 rpm .325-3/8 1.5/ .058
257 33-51/13-20 17.3/9000 rpm .325-3/8 1.5/ .058
1)
From May 1996
Eng, p 2-39 96-09-13, 09.058