1069
Spur Sprocket
Power Mate® System
Small 7 (SM7)
Standard 7 (SD7)
Crankshaft Diameter
Drive Teeth
Rim
OEM
Chainsaw Model
Pitch
ECHO CS-4400
.325"
7 7 7
513442
11892C 18720C 11892C
3/8"
0.394" 0.472"
CS-4500 CS-4600 CS-5000
.325"
CS-5100 (after S/N 134504)
.325"
7 7 7 7
513442
11892C 18720C 11892C 68210C
0.394"
3/8"
CS-5500 CS-8000
.325"
175105-19930 175105-30831 175105-30830
0.472"
3/8"
EFCO 152 MT5200
.325"
7
11892C
50080023
156
.325"
7 7 7 7 7
100758X
11892C 68210C 11892C 68210C 68210C
50012050
3/8"
100757
165
.325"
100758X
50012050 50022034 097000207
3/8" 3/8"
100757
MT7200
MT8200 FRONTIER F-35 FB-35 HOMELITE 20 23 27
3/8" (91)
6
28001
0.394"
3/8" (91)
6 7 6 7
108567 524076
A57344
0.313"
.325"
190 240 245 330 360 410 450 550
3/8" (91)
27958
A95653B
0.375" 0.375"
.325"
11892C 18720C 68210C
3/8" 3/8"
38010
7
A94302
0.625"
3/8"
7
30681X
68210C
A95620 A65990
0.625"
2500 2700 3300 3350 3800 3816 3850 4550
3/8" (91)
6 7
108567 524076
0.313"
.325"
150AO 350 (2-5/8" clutch) 350HG (2-5/8" clutch) 350SL (2-5/8" clutch)
3/8"
7
68210C
A12294 A65987A
0.625"
350 350HG 350SL (3" clutch)
3/8"
7
68210C
A94302
0.625"
35SL
3/8" 3/8"
7 7
68210C 68210C
0.625" 0.625"
EZ EZ 250 AO EZ Auto
A12294 A65987A
i3850b i4150b i4550b
3/8" (91)
6 7 6 6 7
108567 524076 27958 108567 524076
0.313"
.325"
Little Red
3/8" (91) 3/8" (91)
0.375" 0.313"
PS-33
.325"
Part numbers listed in red are obsolete. Contact your authorized Oregon distributor for availability.
2025
TechnicalServices@OregonProducts.com 1.800.223.5168
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