I have a C gearbox on my 582. Whoever put the drain plug on before I bought it really put it on tight. Is there a good way to remove it? I've already decided to buy a new one when I get it off.

Is it imperial or metric? Looks like 11/16 and 17mm both fit but the plug was stripped some and I'm trying not to strip it any more.

The local mechanic suggested running the engine to warm up the gearbox, thinking that the aluminum might expand enough to loosen up the plug. It sounds logical....has anyone had to do this?

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