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aviateer
Joined: 08 Aug 2008
Posts: 23
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 Posted: Sun Mar 22, 2009 5:01 pm Post subject: Re-applying Kreem |
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Hello Kitfoxers again,
I think I am going to re-slosh my fuel tanks. Does anybody have a procedure for this? The Kreem website is not specific to fiberglass tanks. They say to leave acetone in a steel tank for 24 hours to dissolve old Kreem, then re-coat with new Kreem. I think 24 hours would destroy a fiberglass tank.
Also, where does one get a gas cap that can be used in the sloshing process?
The reason I am going to re-slosh with new Kreem is that my Rotax 912 has been rough running for 5 years now. For the last 14 months, the entire plane was down with LEAF in southern WI. They tried everything to get this engine running smooth. Eric Tucker himself looked at this engine several times and he is stumped. I got the plane back, and started thinking of all the logical things that this could be. Then I remembered seeing a black mist like deposit on the inside of the intake manifold. LEAF said that it was just from running auto gas and that auto gas is not as clean as av-gas. But, when I asked some other Rotax service guy, he said that there should be nothing but clean gas in the intake manifold. So, I googled the subject, and on a boating website it stated that ethanol mixed with fiberglass fuel tanks can produce a black misty like tar under the carb, and that you cannot see the black mist in a fuel sample, nor will the filter stop it. Hence, I am going to re-slosh my tanks.
I only use non-ethanol premium autogas, but you never know what you are getting from the gas station.
Has anyone else seen any black mist-like deposits inside there intake manifold?
Thanks,
Kirk Martenson
Classic IV Speedster
[quote][b]
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Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
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| Posted: Tue Mar 24, 2009 6:24 am Post subject: Re-applying Kreem |
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At 05:59 PM 3/22/2009, you wrote:
| Quote: | Also, where does one get a gas cap that can be used in the sloshing process?
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Most auto parts stores have simple two-tanged non-vented gas caps. I
use them for wing folding. I can't say whether they'd stand up to
MEK, however. You'll have to do some testing.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 300 hrs. and counting
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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too. |
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7suds(at)Chartermi.net
Guest
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| Posted: Thu Mar 26, 2009 2:04 pm Post subject: Re-applying Kreem |
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Kirk,
Have you thought of maybe disconnecting your tanks and hooking in a temp to see if the engine problem clears up?
Lloyd C
Mod 5 912ul IVO IFA
From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of Kitfoxkirk
Sent: Sunday, March 22, 2009 8:00 PM
To: kitfox-list(at)matronics.com
Subject: Re-applying Kreem
Hello Kitfoxers again,
I think I am going to re-slosh my fuel tanks. Does anybody have a procedure for this? The Kreem website is not specific to fiberglass tanks. They say to leave acetone in a steel tank for 24 hours to dissolve old Kreem, then re-coat with new Kreem. I think 24 hours would destroy a fiberglass tank.
Also, where does one get a gas cap that can be used in the sloshing process?
The reason I am going to re-slosh with new Kreem is that my Rotax 912 has been rough running for 5 years now. For the last 14 months, the entire plane was down with LEAF in southern WI. They tried everything to get this engine running smooth. Eric Tucker himself looked at this engine several times and he is stumped. I got the plane back, and started thinking of all the logical things that this could be. Then I remembered seeing a black mist like deposit on the inside of the intake manifold. LEAF said that it was just from running auto gas and that auto gas is not as clean as av-gas. But, when I asked some other Rotax service guy, he said that there should be nothing but clean gas in the intake manifold. So, I googled the subject, and on a boating website it stated that ethanol mixed with fiberglass fuel tanks can produce a black misty like tar under the carb, and that you cannot see the black mist in a fuel sample, nor will the filter stop it. Hence, I am going to re-slosh my tanks.
I only use non-ethanol premium autogas, but you never know what you are getting from the gas station.
Has anyone else seen any black mist-like deposits inside there intake manifold?
Thanks,
Kirk Martenson
Classic IV Speedster
| Quote: | | http://www.matronics.com/Navigator?Kitfox-List |
0123456789
No virus found in this incoming message.
Checked by AVG.
3/21/2009 5:58 PM
Checked by AVG.
3/25/2009 6:54 PM
[quote][b]
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Thu Mar 26, 2009 7:21 pm Post subject: Re: Re-applying Kreem |
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You can use your same gas cap just wrap it in plastic wrap like you would food. I have Kreem Weiss in my tanks like all the Flight Design CT's and most of us use 91 octane with ethanol. Many CT's in the world use from 17%-24% ethanol and no issues with Kreem Weiss. None of us has had any problems for 3 years. Kreem Weiss is pretty impervious to just about anything. You may want to take another look at some other component. I just re-sloshed a tank and only rinsed it with acetone. Then just re-coat with the Kreem Weiss. Worked perfect. I have been a Rotax service center for a while and the only black soot around the exhaust is usually too rich a mixture.
I think I might do as Lloyd suggested and hook up an independent fuel supply first and see if the problem continues. I just can't see it being the Kreem unless there is something else in your tank.
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_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056 |
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