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Old 11-07-2012, 05:52 AM   #8
ggamster OP
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Joined: Oct 2011
Location: Tunnel Hill, IL
Oddometer: 234
It's the oil return for the engine breather. Oil goes into the frame from the breather and gets returned via the sump bolt hose.

It isn't present on the 250 so the factory obviously found some reason for installing this system when developing the 310...


I took this from the cafe' Husky forum. Some insight I guess.
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