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The drain plug is the 10mm square plug on the front lower part of the engine. Remove that and the oil will drain. The fills for the engine are the yellow plastic plugs which are both front and back, you can use either.
Be careful when re-tightening the square plug into the block, it is a pipe thread (which basically gets bigger as you thread it in) and I have seen people over tighten it and crack the block.
Use only Briggs 4t oil, and I run 14oz. You will hear some different opinions on how much oil to run, anywhere from 12 to around 16 is what people run.
Tyler,
Greg and the team at Unser Karting Centennial are a great group for advice on many things Karting, as are many local kart shops.
Most racers will change their oil in a Briggs each track day. Due to the (comparatively) low cost of the 4t oil, it’s a good idea to consider this, as after significant run time it loses some of its cooling ability. A typical LO206 will run between 350-410 degrees at the cylinder head operating temperature, so cooling by oil is important!
If you ever remove 4t oil and it has lost a reddish-tinge to it, it’s likely been in the engine too long.
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