Today's Message Index:
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1. 12:54 AM - Re: Ethanol/methanol. Myth or fact (D Wysong)
2. 04:22 AM - Re: Ethanol/methanol. Myth or fact (Thom Riddle)
3. 05:00 AM - Re: Ethanol/methanol. Myth or fact (david alberti)
4. 02:36 PM - Re: Ethanol/methanol. Myth or fact (Roger Lee)
Message 1
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| Subject: | Re: Ethanol/methanol. Myth or fact |
Thanks for passing along the great info, Roger.
Did Eric mention the need to change the oil more frequently
when using 100LL due to lead deposits? Seems like I've
heard that before... but I'm not certain.
While running ethanol through the Rotax might not cause any
trouble, running ethanol through the REST of our fuel system
components might... unless we plan for it.
I have a C150 that is STC'd for MOGAS (O-200) and ethanol
destroyed the rubber o-rings in my fuel tank sump drains.
This occurred over years of use, mind you, but it did
eventually occur.
These days "we" can replace those rubber o-rings with
"ethanol proof" elastomer and not worry any further (as long
as "we" are experimental, of course). My C150 sump drains
were replaced with certified parts... so the clock is
ticking 'til my next pair of replacements are needed.
Arrrgh! ;-)
Thanks for the tip about running a Mogas/Avgas blend in the
Rotax 91X series, too. That's recommended on the O-200 by
old C150 drivers to avoid fouling the plugs with pure 100LL.
We currently run 93 octane in our 914 and it purrrrs like
a kitten. We'll have to try the MOGAS/100LL blend once we
start toying with higher altitudes.
Thanks again for sharing!
D
Message 2
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| Subject: | Re: Ethanol/methanol. Myth or fact |
If alcohol is not a problem for Rotax engine fuel systems, why does
Bing sell an optional carb. kit with alcohol tolerant seals and floats
etc for the Bing 64 carburetors?
Thom in Buffalo
Message 3
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| Subject: | Re: Ethanol/methanol. Myth or fact |
For use on vehicles that don't come standard with those parts already fitte
d. Bing carbs are used on motorcycles too.=0A=0AA couple airports in southe
astern Wisconsin now sell 93 unleaded with the added bonus of no alcohol, b
ut prior to that 95% of the fuel I used was premium pump gas in my 912ULS.
=0A=0ADave=0A----- Original Message ----=0AFrom: Thom Riddle <jtriddle@adel
phia.net>=0ATo: rotaxengines-list@matronics.com=0ASent: Tuesday, February 2
0, 2007 6:21:43 AM=0ASubject: Re: RotaxEngines-List: Ethanol/methanol. Myth
ddle@adelphia.net>=0A=0AIf alcohol is not a problem for Rotax engine fuel s
ystems, why does =0ABing sell an optional carb. kit with alcohol tolerant s
eals and floats =0Aetc for the Bing 64 carburetors?=0A=0AThom in Buffalo=0A
=====
Message 4
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| Subject: | Re: Ethanol/methanol. Myth or fact |
Hi Thom,
I don't know about Bing carbs specifically, but only what Eric Tucker stated.
Bing is used on lots of other applications and maybe they are not set up like the
912's? I used 91 unl with ethanol for 3 years in my Kolb and never noticed
any issues.
If you use 100LL more than 30% of the time then you are supposed to cut your oil
changes down from 50 hrs. to 25 hrs. If you use 100LL more often or all the
time then you have other maintenace issues you need to cover as your engine gets
time on it. That's with synthetic oil because it does not suspend the lead
like semi-synthetic. Eric did say to use either semi or full synthetic and not
use dino oils. I'm sure a number of us use 100LL once in a while and on trips.
If I went to 40% 100LL one time I don't think I would panic.
You can go online at Kodiak and download the Line Maint. and the Heavy maint. manuals.
I would recommend this to all. You can download the parts manual also,
but it is 232 pages of which about 50 are blank for later use. It still has some
very useful info in it.
At my home airport I use 91 unl. octane without any ethanol. We have straight 91
unl down the street from the airport.
--------
Roger Lee
Tucson, Az.
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http://forums.matronics.com/viewtopic.php?p'357#96357
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