Most Cubs have a tube that runs from the front side of the engine block to the intake pipe of the air cleaner. It isn't unusual to find these tubes plugged. If your tractor has one, remove it and clean the tube out. Also run a wire or something similar into the engine block where the tube connects to make sure the opening isn't plugged. This may take care of your visible blowby.
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Today's Featured Article - Talk of the Town: Repairin a Gas Tank - by Staff. This interesting discussion is from the Tool Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
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