Carburetor
The more I read, the more contradictory items surfaced. For example, a book says a carburetor regulates the ratio by weight, not volume. So why would the POH said lean the mixture above 3000 ft?
Also, the book says "..best power is only 2 to 4 pounds of fuel per 100 pounds of air..". Then it immediately gives various ratios for best power (1:14), chemically correct (1:15), etc.
2:100 = 1:50 and 4:100 = 1:25. Neither is close to 1:14.
Comments?