Actually that interior of the engine is completey coated in varnish. The inside of your engine should be aluminum in color, not gold. You need to scrub everything you can or get the block dipped. I've received a few shortblocks that looked similar and had to clean them up. I'm assuming it was poor oil choice on their part causing it, so if you don't mind my asking, what brand/weight oil do you run? Also, what grade and brand of fuel as this may have a slight affect as well. It would seem most of the engines I got that looked like this came from the east coast.
Rick
