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2018/09/20 13:38:26
Squire406

MCCulloch Pro Mac 10-10 rim sprocket size?

Went to replace my old OEM McCulloch rim sprocket on the back of the clutch cover with a Oregon OCS 68210 Power mate rim and no go. Inner diameter of the new Oregon part is bigger. Old part has a smaller inner diameter. Both parts are marked 3/8-7 BTW. What part is available to fit my saw? My old McCulloch has the original shorter McCulloch bar and 3.8 pitch chain. 
2 comments Leave a comment
AVB
Okay if the the out diameter is the same check the inner diameter of the old RIM and it might be 19.5 mm instead of 22.5 mm. If so then 18720 rim should work.
 
Now Oregon is showing only the standard 3/8-7 rim but the above pn is for the smaller 3/8-7 rim that should work on your setup.
2018/09/20 15:40:16
Squire406
Thank you very much for the timely help and info.
2018/09/21 00:49:21

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