Question about Garden
There are a number of possible causes for this symptom:
Too much oil in the crank case. If the oil level is over the recommended amount then oil from the crankcase can be forced up the vent tube into the air cleaner. Check the oil level and drain some off if necessary.
Also check that there is no gasoline mixed in with the oil which could be a sign of a leaky needle valve or stuck float in the carburator. Clean and service the carburator and then drain and change the crankcase oil if this is the case.
Or, it is possible the machine was just tipped on it's side and oil leaked from the crankcase up the vent into the air cleaner assembly. Sometimes just running the machine for a while with the air cleaner removed will clear up this problem. Then just clean up the excess oil and replace the air filter if one is fitted, and double check to make sure the vent line is not clogged up. Then just remember to keep the machine level at all times even when not running.
If it's not something simple like the causes listed above, then it may be a sign of a leaky head gasket or worn rings or something like that instead, which would mean more significant mechanical service is required.
Posted on Apr 04, 2011
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Posted on Jan 02, 2017
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