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I have a Honda easy start 6cv 150 mower and I can;t find the drain plug. I have never change one before

That was very helpful and quick response. thank you

I believe on these 4-stoke mower engines that you pour the old oil out of the same oil filler hole that you’d also add oil to. see: https://www.youtube.com/watch?v=qk1PsuHJhttp://powerequipment.honda.com/support/