It is my understanding that many small engines, such as a Briggs and Stratton, do not use any coatings. B&S coolbore cylinder is just the aluminium alloy forming the block with no sleeves or coatings applied.
Any issues with corrosion of carburetors, heads, intakes, pistons, etc?
Most of my engines are aluminium, some with steel cylinder sleeves, some without, but for nearly all of them the block itself is entirely aluminium as well as many other parts, ergo my questions.
I don't suppose anyone has pictures of a head or other surfaces after prolonged exposure?