[Healeys] Ethanol fuel result

Michael MacLean rrengineer.mike at att.net
Sun Jun 3 12:37:23 MDT 2018

Just replaced the float of the sending unit in the gas tank of my Bugeye.  Replaced the cork gaskets with Viton to be sure no fumes from the fuel.  I ma familiar with Viton for many years.  I have been using Viton fuel lines with my radio control gas engines.  One thing that guys using this fuel line caution is it gets hard over time and must be replaced.  Not sure if that translates to carb diaphagms or automotive fuel lines though.
Mike MacLean 

    On Sunday, June 3, 2018 10:53 AM, Tim Davis BN7 <tld6008 at mchsi.com> wrote:

 #yiv9052346420 body {min-height:100%;color:#000000;font-size:12pt;font-family:Times New Roman;}Not trying to prove anything just an FYI.Some of the damage was mechanical as a result of me trying to remove them. One was leaking badly on the car the other had not started but both were very brittle especially around the inner part probably since the outer edge was clamped between the flanges on the carb body and somewhat isolated from the fuel. I looked around before buying new ones and bought the ones that claimed to have Viton diaphragms. I am familiar with this material as in my past employment it was the only material compatible with methanol. 

Tim Davis BN7

----- Original Message -----
From: Bob Spidell <bspidell at comcast.net>
To: healeys at autox.team.net
Sent: Sun, 03 Jun 2018 10:44:13 -0400 (EDT)
Subject: Re: [Healeys] Ethanol fuel result

Ugh.  That damage may well have been caused by ethanol, but I'm a
 born skeptic with a little scientific training.  Without a control
 sample you can't prove the damage was caused by ethanol (but
 again, it may well have been).  I just changed out a set in my
 HD8s that had been in over 25 years and all I saw was some tiny
 cracking, and I live in California and I think we've had gasahol
 longer than most states.Some of that damage looks mechanical to me; it could simply be
 defective parts.  I would hope manufacturers are making parts from
 ethanol-resistant rubber, because I just put in a new set that
 look just like those.Bob

On 6/3/2018 6:13 AM, Tim Davis BN7

FYI, here are my HD6 jets after being exposed to todays gas
 for approx 4 years. Will definitely use non ethanol fuel
 whenever possible from now on.

Tim Davis BN7

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