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#1
08-27-2013, 11:00 PM
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Cub 109 breather
Is it normal for a very slight bit of smoke out of the breather on my 109? The motor was rebuilt a few years back with not an excessive amount of time on it. There is never any smoke out of the exhaust and oil usage is very minimal. Figured someone here wile chime in.
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#2
08-27-2013, 11:32 PM
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I'm not an engine expert, but I believe that it is normal. I use pure synthetic oils in my cubs and have had little if any smoke from them. What oil are you using?
Cub Cadet 123
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Still don't know what I'm doing in OHIO?.....If you find me, then please point me back toward INDIANA. 
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#4
08-28-2013, 12:21 AM
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This is normal. The cankcase vent on these old Kohlers is vented to the atmosphere, unlike the motors of today. The EPA deemed this "harmful" and all motors now, vent into the air breather. That is why your not used to seeing all other engine's "smoke", because it is fed back into the engine.
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#5
08-28-2013, 05:31 AM
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Quote:
Don't want to hi-jack the topic so ill start a new thread under Kohler engine & synthetic oil. NIK,
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It dont cut grass, but its yellow.
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#6
08-28-2013, 09:57 AM
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This K301 engine is a very low hour machine, I got it with 61 hours, it now has 65 hours.
Notice the tube from the breather to the carb. This is a late 1970's machine (I believe)  The inside of that tube has no oil in it. I guess as it gets older, more oil vapor will be produced, but, to answer your question, I do not think there should be any smoke out of the breather.  If it were normal, the vented machines would have shown oil on the side of the engines, and buyers would have been back complaining about them.  You can buy an aftermarket breather cover like the one on my machine. Hook a hose to it, run it into the air filter, you will not see anymore smoke.
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