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The Jeffco 9700 FCR data sheet showed that it is supposed to be compatible with gas/alcohol mixes. One of my fellow builders tested some samples with Jeffco coatings, and Aeropoxy in a mix of gas/15%Alcohol. The Jeffco coating was intact after the soaking, *but* it did swell some. The Aeropoxy flaked off .
So, any pinholes in the Jeffco, and the underlying aeropoxy would be attacked, leading to a sequential failure as the underlying epoxy was attacked.
Bill Schertz
KIS Cruiser #4045
N343BS
----- Original Message ----- From: "Charlie England" <ceengland@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, August 13, 2008 1:26 PM
Subject: [FlyRotary] Re: Tank problem with Mogas vs fouled spark plugs
Bill,
Do you still have the container of sealer? If so, why not just look up the product's data sheet or call the manufacturer to see if it's safe for alcohol? IIRC, the stuff that Van has sold in recent years (Flamemaster brand) is alcohol safe. At least, the stuff they shipped to me was. A bigger concern if you used any old aviation style items like gascolators, is the likelihood of natural rubber gaskets in them.
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