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Hello Chip;
If you still have the standard system, the fuel pump
transfers fuel from the wing tanks to the header tank where it is gravity fed to
the carb. If your fuel pump is feeding the carb directly, then a too rich
mixture is indeed very possible. If you're suspecting ice, then carb heat
should allow the engine to be smooth. When you pull the carb heat
cable it will enrichen the mix a bit. If there's too much fuel
being forced into the carb you may be able to cut it down by pulling the
mixture cable, leaning it out. But before I did anything else, I would
check where that fuel pump is hooked up to. If you have the Skyport fuel
system, you should have the paperwork the mechanic used for the
conversion. If not, ask John for a diagram and make sure everything
is in order. Keep us posted.
Al
----- Original Message -----From: Chip AndrewsTo: techSent: Monday, November 22, 2004 10:13 PMSubject: [COUPERS-TECH] Carb ice----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----Gentlemen I could sure use some help. I have a 46 415-C serial number 1157. I have had the plane about a month now and put about 8 HRS on it. I have been experiencing what I think is carb icing problems. I switch form a marvel to a rebuilt Stromberg because Buldoc informed me that the Marvel was the wrong one for the C-75. I have the same problem still going on. I am wondering if it may be due to the fuel pump they put on this plane. The original one engine driven has been replaced with a electric fuel pump. I have a light mounted on the panel that tells me when the pressure goes down. Could this be forcing to much pressure to the carb, instead of the gravity feed normally used. I was told to turn the pump on at start up and leave it on. I have been told by more than one A&P that it may not be icing at all, but to much fuel. Comments PLEASE.Chip============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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