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1. 10:11 AM - Re: RotaxEngines-List Digest: 7 Msgs - 03/15/10 (Kitfoxkirk)
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| Subject: | Re: RotaxEngines-List Digest: 7 Msgs - 03/15/10 |
Scott,
Is there any black "mist" inside your intake manifold? Have you been adding
anything to your fuel (e.g. Stabil, or SeaFoam)? These chemicals may contain
propenol (or other alcohols) that may not be compatible with your fuel
tanks. I was having the same problem. I took off the tanks and cleaned out
all the old "Kreem" fuel tank liner with acetone. Then resloshed with Kreem
cut with MEK. I also replaced the old fuel lines with blue translucent fuel
line. I took a Q-tip with alcohol on it and swabbed a sample of my black
fuel line. The Q-tip turned black. I conducted the same test with a section
of blue tubing and found the Q-tip to be clean.
The problem is that the resin used in the fuel tank can leach into the
alcohol and not show up until it is atomized passed the carburetor. Hence,
the black "mist" in the intake manifold passed the carburetors.
Kirk
On Tue, Mar 16, 2010 at 1:57 AM, RotaxEngines-List Digest Server <
rotaxengines-list@matronics.com> wrote:
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> RotaxEngines-List Digest Archive
> ---
> Total Messages Posted Mon 03/15/10: 7
> ----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 07:25 AM - My 912 is still not happy-- (sdemeyer)
> 2. 09:23 AM - Re: My 912 is still not happy-- (Chris Blackmore)
> 3. 02:20 PM - Re: My 912 is still not happy-- (jason parker)
> 4. 03:00 PM - Re: My 912 is still not happy-- (Brian Davies)
> 5. 03:04 PM - Re: My 912 is still not happy-- (Ollie Washburn)
> 6. 03:56 PM - Re: My 912 is still not happy-- (Pete Christensen)
> 7. 07:16 PM - Re: My 912 is still not happy-- (Carl)
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 07:25:59 AM PST US
> Subject: RotaxEngines-List: My 912 is still not happy--
> From: "sdemeyer" <scottsr1100rt@yahoo.com>
>
>
> Hi Guys,
>
> I'm out of ideas on why my 912UL continues to run rough in midrange between
> 2000
> and 3500 RPM. I've rebuilt the carbs, I've sent the carbs in and had them
> gone
> through again, I've replaced the entire ignition system including
> modules,coils,trigger
> coils and stator, spark plug wires, plug boots and spark plugs. I've
> balanced the carbs several times with my carbemate. Compression is good in
> all cylinders - 80/87.
>
> When I say rough running, I mean the engine shakes and misfires quite
> noticeably
> between 2000 and 3500 RPM.
>
> Any suggestions on what to check next would be quite helpful!
>
>
> Thanks
> Scott
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=290350#290350
>
>
> ________________________________ Message 2
> _____________________________________
>
>
> Time: 09:23:33 AM PST US
> From: "Chris Blackmore" <blackmore@platinum.ca>
> Subject: Re: RotaxEngines-List: My 912 is still not happy--
>
> Bad fuel, sticky / bent valves that clutch thing that was recently talked
> about. Cracked porcelain on plug,plugged fuel line/filter/pump? Mag switc
> h
> /mag,bad ground, put an old fashioned scanner in it to see what the spark
> is
> doing
> Chris
>
> -------Original Message-------
>
> From: sdemeyer
> Subject: RotaxEngines-List: My 912 is still not happy--
>
> com>
>
> Hi Guys,
>
> I'm out of ideas on why my 912UL continues to run rough in midrange betwe
> en
> 2000 and 3500 RPM. I've rebuilt the carbs, I've sent the carbs in and had
> them gone through again, I've replaced the entire ignition system includi
> ng
> modules,coils,trigger coils and stator, spark plug wires, plug boots and
> spark plugs. I've balanced the carbs several times with my carbemate.
> Compression is good in all cylinders - 80/87.
>
> When I say rough running, I mean the engine shakes and misfires quite
> noticeably between 2000 and 3500 RPM.
>
> Any suggestions on what to check next would be quite helpful!
>
>
> Thanks
> Scott
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=290350#290350
>
>
> =========
> =========
> =========
> =========
>
>
> ________________________________ Message 3
> _____________________________________
>
>
> Time: 02:20:47 PM PST US
> From: "jason parker" <litesellme@yahoo.com>
> Subject: Re: RotaxEngines-List: My 912 is still not happy--
>
>
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> Cg
>
>
> ________________________________ Message 4
> _____________________________________
>
>
> Time: 03:00:22 PM PST US
> From: "Brian Davies" <bdavies@dircon.co.uk>
> Subject: RE: RotaxEngines-List: My 912 is still not happy--
>
>
> Hi Scott, what does the carb balancer show when the engine is misbehaving?
> This can often be caused by one throttle cable sticking but this should
> show
> up as an imbalance at that rpm.
>
> Regards
>
> Brian Davies
> Europa XS with 912ULS
>
> -----Original Message-----
> From: owner-rotaxengines-list-server@matronics.com
> [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of
> sdemeyer
> Sent: 15 March 2010 14:25
> Subject: RotaxEngines-List: My 912 is still not happy--
>
> --> <scottsr1100rt@yahoo.com>
>
> Hi Guys,
>
> I'm out of ideas on why my 912UL continues to run rough in midrange between
> 2000 and 3500 RPM. I've rebuilt the carbs, I've sent the carbs in and had
> them gone through again, I've replaced the entire ignition system including
> modules,coils,trigger coils and stator, spark plug wires, plug boots and
> spark plugs. I've balanced the carbs several times with my carbemate.
> Compression is good in all cylinders - 80/87.
>
> When I say rough running, I mean the engine shakes and misfires quite
> noticeably between 2000 and 3500 RPM.
>
> Any suggestions on what to check next would be quite helpful!
>
>
> Thanks
> Scott
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=290350#290350
>
>
> ________________________________ Message 5
> _____________________________________
>
>
> Time: 03:04:45 PM PST US
> Subject: Re: RotaxEngines-List: My 912 is still not happy--
> From: Ollie Washburn <ollies7s@gmail.com>
>
> My 912ULS also runs rough in that range however there is no time I fly in
> that range so I just pass through it and go flying. 650+ hrs.
> Ollie
>
> On Mon, Mar 15, 2010 at 10:24 AM, sdemeyer <scottsr1100rt@yahoo.com>
> wrote:
>
> > scottsr1100rt@yahoo.com>
> >
> > Hi Guys,
> >
> > I'm out of ideas on why my 912UL continues to run rough in midrange
> between
> > 2000 and 3500 RPM. I've rebuilt the carbs, I've sent the carbs in and had
> > them gone through again, I've replaced the entire ignition system
> including
> > modules,coils,trigger coils and stator, spark plug wires, plug boots and
> > spark plugs. I've balanced the carbs several times with my carbemate.
> > Compression is good in all cylinders - 80/87.
> >
> > When I say rough running, I mean the engine shakes and misfires quite
> > noticeably between 2000 and 3500 RPM.
> >
> > Any suggestions on what to check next would be quite helpful!
> >
> >
> > Thanks
> > Scott
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=290350#290350
> >
> >
>
> ________________________________ Message 6
> _____________________________________
>
>
> Time: 03:56:12 PM PST US
> From: "Pete Christensen" <pchristensen10@austin.rr.com>
> Subject: Re: RotaxEngines-List: My 912 is still not happy--
>
> My plane has a rough range too but when I pull on carb heat it smoothes
> out.
>
> Pete
>
> ----- Original Message -----
> From: Ollie Washburn
> To: rotaxengines-list@matronics.com
> Sent: Monday, March 15, 2010 9:50 AM
> Subject: Re: RotaxEngines-List: My 912 is still not happy--
>
>
> My 912ULS also runs rough in that range however there is no time I fly
> in that range so I just pass through it and go flying. 650+ hrs.
> Ollie
>
>
> On Mon, Mar 15, 2010 at 10:24 AM, sdemeyer <scottsr1100rt@yahoo.com>
> wrote:
>
> <scottsr1100rt@yahoo.com>
>
> Hi Guys,
>
> I'm out of ideas on why my 912UL continues to run rough in midrange
> between 2000 and 3500 RPM. I've rebuilt the carbs, I've sent the carbs
> in and had them gone through again, I've replaced the entire ignition
> system including modules,coils,trigger coils and stator, spark plug
> wires, plug boots and spark plugs. I've balanced the carbs several times
> with my carbemate. Compression is good in all cylinders - 80/87.
>
> When I say rough running, I mean the engine shakes and misfires
> quite noticeably between 2000 and 3500 RPM.
>
> Any suggestions on what to check next would be quite helpful!
>
>
> Thanks
> Scott
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=290350#290350
>
>
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>
> ________________________________ Message 7
> _____________________________________
>
>
> Time: 07:16:26 PM PST US
> From: "Carl" <b.carl@sympatico.ca>
> Subject: Re: RotaxEngines-List: My 912 is still not happy--
>
>
> Scott.
> Stop the engine in the range where it is missing, don't touch the throttle
> or choke controls, check to see if the control levers on your carbs are in
> sync. If not pull on them to see if they are binding. If they move restart
> the engine to see if this correct the problem.
> Also, the engine moves slightly when under load, depening on your throttle
> setup this could cause the carb to loose their sync. Long shots but you
> appear desperate.
> Carl
> ----- Original Message -----
> From: "sdemeyer" <scottsr1100rt@yahoo.com>
> Sent: Monday, March 15, 2010 10:24 AM
> Subject: RotaxEngines-List: My 912 is still not happy--
>
>
> > <scottsr1100rt@yahoo.com>
> >
> > Hi Guys,
> >
> > I'm out of ideas on why my 912UL continues to run rough in midrange
> > between 2000 and 3500 RPM. I've rebuilt the carbs, I've sent the carbs in
> > and had them gone through again, I've replaced the entire ignition system
> > including modules,coils,trigger coils and stator, spark plug wires, plug
> > boots and spark plugs. I've balanced the carbs several times with my
> > carbemate. Compression is good in all cylinders - 80/87.
> >
> > When I say rough running, I mean the engine shakes and misfires quite
> > noticeably between 2000 and 3500 RPM.
> >
> > Any suggestions on what to check next would be quite helpful!
> >
> >
> > Thanks
> > Scott
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=290350#290350
> >
> >
> >
>
>
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