The AG200 has a slightly unusual method for draining the engine oil. Instead of a generic old drain plug, it has a drain cap which is also used to hold a spring loaded oil strainer. The AG200 engine has a cool design where it has a big strainer at the bottom of the engine to hold back the big chunks, while the finer oil filter (on the other side of the engine) keeps the rest of the damaging material out of circulation. Now all we need to do is get people to clean them and replace the oil! …but I digress!
The real aim of this post is to guide people on how to not chew up the drain cap. Here is the crux of it; the hex head on the cap is 19mm, if you use a shifter you will wreck it. If you use an open end spanner you will wreck it. If you use a double hex ring spanner you will wreck it. If you use a double hex socket you will wreck it. If you use a cold chisel you will…you get the idea!
There is one effective way to get it off without damaging the cap – a single hex, 19mm socket. Where do I get one of those I hear you ask, drop into your local tool shop and ask for a 1/2 inch drive, 19mm impact socket. It will be black (black oxide), and have a hex interface to match the drain cap. They are cheap and make your life a lot easier as far as oil changes go.