>From John -Tom
-----Original Message----- From: JOHN SCHESTAG [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 10, 1998 6:55 AM To: [EMAIL PROTECTED] Subject: Vapor lock or not I guess the clothes pins are a "fun" or unique way of fixing things, but isn't it true that vapor lock only takes place on horizontal fuel lines and not vertical ones? (air bubble expansion due to an existing bubble that becomes heated or from boiling fuel at or near a hot spot in the fuel line)? I don't remember the routing of the header tank fuel line but it may be worthwhile to take a look at other Ercoupe's and their lines to see why yours may or may not be vapor lock related. The fuel line from the header tank to the carb would be somewhat vertical and not prone to having air bubbles in the line waiting to expand. By chance does the line leave the tank and descend downward and then make a bend upward and then down to the carb fitting in any way thereby leaving a possible "arch" in the line that could hold a "bubble"? This "arch" may have been caused by someone installing a new line that was a little longer than the original. I still feel the problem is not vapor lock related. Have you really checked, (taken apart), your carb heat hardware and had it inspected by an A&P for free movement or wear? Oh, the horror stories we all could tell about worn out carb heat doors and shafts!! While driving an auto on slow climbs up a hill on a hot day pulling a trailer, vapor lock was caused by lines runnng next to exhaust pipes, manifolds, etc., and we kept a jug of ice water and poured it on the fuel pump and the fuel lines around it (intake side).... this corrected the problem immediately! In closing, Jack Lewis....I love your graphic of the Ercoupe! If this line sketch of an Ercoupe depicts yours with that zero degree dihedral..... your old N99069 has to be the fastest Ercoupe on the mailing list! John
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