sounds like you're not finding the drain plug.
at the center of the very bottom of the engine, typically one in the front, one in the back, is either a square head pipe plug or a hex (allen) head pipe plug. remove one of those (whichever one will make the least mess and you can get a drain pan under.) These pipe plugs are at the base level of the engine, right next to the mounting plate it's bolted to. usually makes a pretty good mess of things when it drains.
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