Question about Troy Bilt, Tuffy, Rear - Tine Tiller, 4.0 Tecumseh Engine

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Oil blows out of tube

I have a 8 hp tecumseh snow blower when running at full power it blows crank oil out of a breather tube next to carb any ideas

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You either have a head gasket going bad or your piston rings are shot which causes air to go down into the crankcase building up pressure which exits through the breather tube.

Posted on Feb 01, 2009

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mmm interesting.after comming up to temperature engine experiences excess blow by into crank case .doutfull if it has the wrong size rings for the cylinder as there would be other syptoms as well.think some thing is going on with the reed vave sticking open causing pressure build up into crank case

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My troy-bilt blower/vac is blowing oil out of the carb. what are some things that may cause this? Oil level? How do I know I have proper amount of oil? If I leave the foam filter and the carb cover on, the...


Your oil breather (on the side of the engine opposite the carb) may be malfunctioning/defective allowing the carb to **** oil from it. There is a breather tube that crosses over the top of the cylinder connecting the crankcase( oil) breather to the air filter housing. Check the oil level and the condition of the air filter and esp. the oil breather. It serves the same function as a PCV on a car engine.

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