Just purchased a push mower with Honda GVC160 OHC engine. Mowed only once but I love this engine. I looked at the bottom of the engine and I could not find an oil drain plug. I looked in the manual and they show that you remove the dipstick and tip the mower to drain from the fill tube. I think this method stinks. Am I missing the drain plug or has someone here installed a drain plug to make this a better process? Thank you. Philip.