Oil blowing out exhaust - Snowblower Forum : Snow Blower Forums
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post #1 of 18 Old 11-21-2018, 07:58 AM Thread Starter
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Oil blowing out exhaust

Hello, I am from Ottawa, Canada and own a Cub Cadet 28" snowblower. I am worried that I may have over filled the oil reservoir, as I went to start it last night and smoke came billowing out of the exhaust as well as oil. I have since drained the oil back down to the point where it is showing up on the oil stick. I tried starting again and the motor would not turn over? I will try again tonight. Any advice?
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post #2 of 18 Old 11-21-2018, 08:31 AM
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Its most likely hydro locked from oil in the cylinder. I would pull the spark plug out and pull over till all the oil gets out of the cylinder.
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post #3 of 18 Old 11-21-2018, 08:49 AM Thread Starter
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Thanks for the speedy response. What do you mean by "pull over till all the oil"?
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post #4 of 18 Old 11-21-2018, 08:53 AM
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Once the spark plug is out when you turn the engine over the oil can come out the spark plug hole. You cant compress a liquid.
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post #5 of 18 Old 11-21-2018, 08:54 AM
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Remove the spark plug and pull the pull cord or crank the engine. If there is oil on top of the piston, it will shoot out the spark plug hole. Pull a bunch of times then replace the spark plug. It will smoke for a few minutes to several until the oil burns out of the muffler. You may smoke up the neighborhood!

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post #6 of 18 Old 11-21-2018, 08:55 AM Thread Starter
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OK, I'll try that. Thanks for your help guys!
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post #7 of 18 Old 11-21-2018, 09:01 AM
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Pull on the starter cord with the spark plug removed, and you should see oil spurting out of the spark plug hole - making a little bit of a mess. It may lessen the mess by putting a rag in front of the plug hole to catch the oil. Continue this until no more oil comes out of the cylinder. Possibly a half-dozen pulls. The rope will pull easily because there will be no compression with the plug removed, so don't get worried if the engine continues to spin after each pull.


Once all the oil is blown out, you can re-insert the spark plug, and it should run fine.
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post #8 of 18 Old 11-21-2018, 09:06 AM
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Make sure you add the right amount of oil. Don't over fill the oil.
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post #9 of 18 Old 11-21-2018, 09:12 AM
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Quote:
Originally Posted by kpinks View Post
I have since drained the oil back down to the point where it is showing up on the oil stick.

Good advice so far.

This part makes me a bit concerned. Just make sure you drained it far enough that it's between the Low and Full marks on the dipstick. Over-filling the oil can be bad. Extreme over-filling, like your situation, has obvious symptoms. But over-filling by a lesser amount can still result in the oil flinger stirring up the oil too much, aerating it. Aerated oil doesn't lubricate as well, and can result in more serious engine damage, without visible symptoms until the damage is already done.

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post #10 of 18 Old 11-21-2018, 09:55 AM
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Also, if the plug is oily, clean it or replace it. A single exposure to oil won't "foul" a plug in the normal sense of the word, but enough oil on a plug can make it harder to start the engine.

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