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JohnF2015, Small Engine Technician
Category: Small Engine
Satisfied Customers: 1140
Experience:  Owner/Service Technician at S & J Small Engines
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Reason a generac 10 kw standby is blowing oil threw exhaust

Customer Question

reason a generac 10 kw standby is blowing oil threw exhaust power went out generator ran for three hours then started to run rough went to see what was going on and there was oil smoke coming out of exhuast what could be the reasons the unit has been working perfect for the past three years till last night
Submitted: 2 years ago.
Category: Small Engine
Expert:  JohnF2015 replied 2 years ago.

Hi, my name is***** will be assisting you.

What engine do you have on this machine? Can you provide the model and serial number from the frame of the machine?

Expert:  JohnF2015 replied 2 years ago.

There are several reasons that this could happen. If the crankcase becomes overfilled with oil, a blown head gasket, broken ring, air leak around the engine gaskets or seals that is allowing the crankcase to become pressurized. The easiest things to check are oil level, oil leaks from any part of the engine. Then you would do a compression check on each cylinder if more than one to see what the compression is. Then a cylinder leak down test to check integrity of the rings and valves.