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The simple answer is: Yes. It can free up the engine and I'm sure it wont cause any harm. I've used this method several times in the past and recommend trying WD-40 first. But really any penetrating oil will work just fine. Heck, I've even been successful with used motor oil! But I do not recommend using that because there are fine particulate in it that may cause damage.

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13y ago

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Q: Will wd40 help unseize small engine?
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