Oil Breather Vapors

Sun Nov 25, 2012 10:52 pm

Hello, I fired up the cub inside the shed a couple of days ago.
It started fine , it was cool outside but not freezing. after a while I noticed
a small amount of vapor coming from the oil dipstick vent . Is this normal ?
I have never noticed it before. My cub usually has a very light white smoke from the exhaust pipe
until warm then it clears up. Seems to run fine otherwise.

Re: Oil Breather Vapors

Sun Nov 25, 2012 11:00 pm

Yup, condensation inside the block is evaporating off. Let it run till it gets good and warm, it should stop.

Re: Oil Breather Vapors

Sun Nov 25, 2012 11:29 pm

This time of year when you can get temperature swings of 30 or 40 degrees or more within a day or two will cause more condensation than usual.

The venting condensate is more likely to be noticed when it is cold outside.

Re: Oil Breather Vapors

Sun Nov 25, 2012 11:43 pm

Thanks Guys, I was hoping that was the case.

Re: Oil Breather Vapors

Sun Nov 25, 2012 11:56 pm

If the symptoms remain from the oil filler tube, you may have a partially blocked breather tube which runs from the air cleaner body to the front of the engine block. Remove, clean out with compressed air, and reinstall.

Reference #8 here on Rudi's manual server:

http://www.cleancomputes.com/Cub/Cub%20 ... age-30.jpg

Re: Oil Breather Vapors

Tue Nov 27, 2012 4:53 pm

Thank You Cubguy47