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[SOLVED] 12 hp Briggs/oil blows back into carb.

This is a discussion on [SOLVED] 12 hp Briggs/oil blows back into carb. within the Small Engines forums, part of the Tech Support Forum category. I changed the valve cover that connects to carb with rubber tube. Ran great for a couple of minutes and


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Old 03-19-2011, 06:29 PM   #1
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I changed the valve cover that connects to carb with rubber tube. Ran great for a couple of minutes and then blew out again, blowing oil into carb, choking out engine. Any ideas?

Thanks,
Will

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Old 03-20-2011, 03:43 AM   #2
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Are the oil return holes clogged? Some valve cover gaskets have holes you have to line up or the gasket covers the oil return holes. If you have pressure coming from the combustion chamber into the valve cover you have other problems.

I suggest pulling the valve cover off and check the gasket, if that was installed right, check and clear the return holes, then start the engine and see if you have pressure coming from some where. Only run the engine for a second, long enough to see what's going on...

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Old 03-20-2011, 02:23 PM   #3
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This valve cover, are you talking about the rocker arm cover, or the breather valve cover? If it's a breather, it may be defective or improperly installed.
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Old 03-21-2011, 12:25 PM   #4
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Thanks for reply. I found my problem. I re-checked the oil level with my glasses on and found it was over filled. Drained out about a pint. Runs great!!
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Old 03-21-2011, 12:32 PM   #5
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Awesome! Next time, just remember to put your glasses on before adding oil (Marking this thread as solved)

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