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Continental E-225-4 question
Most if not all Mogas today has Methanol in it as a replacement for
the oxygenation agent MTBE. Gas pumps are not typically labled as to alcohol content. Both Petersen and EAA autogas STC's are not valid with autofuels containing alcohol. At a recent IA seminar held by the FAA we were reminded that even with an autogas STC if an airplane is operated using a fuel containing any alcohol that the airplane would be considered by them to be "unairworthy". Unairworthy to the FAA also means uninsured to most aviation underwriters. So you won't have a problem until you have a problem! Methanol is hydroscopic which means it holds water. This water will, over time, rust the steel parts in the fuel system. Gary Plewa On May 31, 6:42 am, Ron Natalie wrote: Rip wrote: Jim, sadly there is no mogas STC for the Navion, with any engine. Rip Yep, I even talked to Petersen about this (the EAA doesn't touch 6 cyls). All they knew was they had tested it and it had failed the vapor lock test. They couldn't remember which engine, fuel system, or model Navion they had used. |
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