Yamaha 130 oil problem

[dcobbett]

I'm at about the 6 or 7 hour point of Yamaha's 10 hour, double oil break-in process and I've been using a 6 gallon portable so the mix of oil/gas doesn't happen in the new main tank.

Anyway, twice today, the small oil tank under the engine cover overfilled. Smoke everywhere, but no alarm bells or flashing lights. I cleaned up the mess in the pan under the power head, emptied the small tank, checked the filter, etc. cleaned the port side plugs, replaced the star'b'd side ones (I was on the water both times and didn't have a lot of tools with me), added oil to the main tank, and watched as the small tank filled to the high limit line when I turned on the key. Figured I was home free, but the exact same thing happened about 3 hours later.

Any ideas as to what's going on (bad sensor, etc.)?
Why so much smoke when this happens, and why is it so difficult to blow out the engine in order to get it running right again? Is the overflow getting into the combustion process.
Finally, what's the permanent fix/solution?

Thanks in advance