British Seagull Oil Drain Plug
thingiverse
This is a replacement oil drain plug for British Seagull outboard motors. The thread is 3/4-12, and I have modified the design slightly to make the hole down the middle a little smaller, and hexagonal. This is in case the oil cap breaks across the layer lines, it should still be possible to put an allen key down it and unscrew the threaded stub that way. There's a version with a slightly larger flange (could be used with an O-ring) in case it has sealing problems, but I hope it doesn't come to that. In theory PLA is petrol/oil resistant, and the gearbox shouldn't really heat up to the point where it melts as it's under water. Recommended to print this at 100% infill.
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