I've been spending some time working on a friends carb this week. It has the heat soak issues that many complain about so when I pulled it in the shop I immediately pulled the top to look at the fuel and thought it interesting to see the boil. This is 10% ethanol. My experience has been less of an issue with no ethanol gas as it's boiling point is higher. I would say this one is certainly in need of a phenolic spacer.
Last edited by Brewski; 08-26-2014 at 08:53 PM. Reason: Add link