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Glad I decided to do an oil change

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Decided to change the oil on my 716H. I change several times during the mowing season even though I probably put less than 20 hours on it all season. Anyway, when I went to remove the drain plug I found that it was barely hand-tight. Must've worked its way loose. I always check the oil level before starting the engine, but in this case I consider myself lucky because that plug could've vibrated out, without me knowing it, and goodbye engine.

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The threads on the plug probably just wore out from all those oil changes! My engines with oil filters get an oil change once a year (way less than 100 hours however). Engines with a splash system I still change when they get 25 or 30 hours on them. However, I do use Amsoil small engine oil in all of my small engines.

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I have had opposite problem, where the plug is too tight and hard to loosen. Last change, I oiled the threads, snugged the plug, and gave it a little more - trying to find a good balance. I might change the plug also; it's showing some wear after 30 years. Nice when preventative maintenance prevents major disaster. sm01 I use a shot glass to add an ounce to keep the oil level on the line, engine cold. Helps monitor oil consumption also. It likes a wee dram once in a while - so do I - but that's not motor oil. 8)

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