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Possums
Joined: 03 Nov 2007
Posts: 247
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 Posted: Mon Sep 21, 2009 10:39 am Post subject: Help please - can't take off |
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At 12:13 PM 9/21/2009, you wrote:
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<cristalclearwaters(at)gmail.com>
These are all great suggestions. I've made a big list of things to
check. I'm going to try to work the easiest ones first.
Since I haven't cleaned the air filters in 50 hrs and over a year
and half I'll start with that. I also noticed that the vent tube I
purchased from the hardware store down the street has gotten a
little mushy on the bottom where the holes are.
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If those holes get plugged up - the engine will act like you are talking about.
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Dana
Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA
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| Posted: Thu Sep 24, 2009 5:05 pm Post subject: Help please - can't take off |
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At 01:59 PM 9/19/2009, cristalclear13 wrote:
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<cristalclearwaters(at)gmail.com>
[Crying or Very sad]
I put new choke seals on my Bing carbs. I am still having the same
symptom...advance the throttle and I can't get over 3500-4000rpm.
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Cristal, different engine and carb, but I had a similar problem on my
UltraStar. It would run OK at full throttle if you could get it there, but
would be reluctant to get there from cruise. The problem turned out to be
the needle clip position; it was running too rich at cruise power and the
engine just bogged down and wouldn't accelerate. The day was much hotter
and humider (is that a word? more humid, then) than the last time I'd
flown it.
I doubt it's a fuel delivery problem upstream of the carburetor; if that
was the case the carb bowl would fill up at lower power settings and then
it would run fine at WOT until the float bowl starved again (had that
problem once too).
-Dana
--
Aviation is like drugs: You go up, then you come down. You are out a
big pile of money and have nothing to show for it but the experience.
And you can't wait to do it again.
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cristalclear13
Joined: 19 Sep 2007
Posts: 363
Location: Southeast Georgia
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| Posted: Thu Sep 24, 2009 5:44 pm Post subject: Re: Help please - can't take off |
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Mystery solved and I am in the air again! Yippee!
Check her out:
http://www.youtube.com/watch?v=ci_AWK1MvIE
It's a beautiful sound!
Here's the story. After replacing my choke seals and cleaning my carbs I moved the throttle several times and saw that both slides were moving up and down in sync. I specifically remember checking this because I was alone and had to go from the front to the back checking it at intervals. Then when I went to test fly it, I had this problem that I requested help from you all. I decided to start with the easiest things...cleaning my air filter. Tuesday night while I had the air filter off and had my son with me I had him move the throttle...low and behold... one slide was not moving! Grr!
The throttle cable was out of the slide. I went ahead and put the new style of the white cup in and put her back together. Had my son move the throttle several times and everything looked ok, but it was too dark to try her out!
So this evening I went out and put on my clean air filters and cranked her up. She sounded so good! I ran it up a bit and still sounded good. I untied her and Took Off! It ran better than it ever has (which is what I was expecting after replacing that deteriorated choke seal). Next time I pull that plug I expect it to be the nice sandy brown that the other one has always been.
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Cristal Waters
Kolb Mark II Twinstar Rotax 503 DCSI Sept 2007 - sold Sept 2012
Private Pilot Aug 2008
ELSA Repairman for N193Y April 2008
Rotax 2 stroke maintenance April 2009 |
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Thu Sep 24, 2009 5:57 pm Post subject: Help please - can't take off |
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> So this evening I went out and put on my clean air filters and cranked
her up. She sounded so good! I ran it up a bit and still sounded good. I
untied her and Took Off! It ran better than it ever has (which is what I
was expecting after replacing that deteriorated choke seal). Next time I
pull that plug I expect it to be the nice sandy brown that the other one has
always been.
| Quote: |
--------
Cristal Waters
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Hi Cristal/Gang:
I am happy for you.
Glad you found your problem.
Usually, I find my problems are something I have "messed" with, changed,
adjusted, etc.
john h
mkIII
Rock House, Oregon
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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cristalclear13
Joined: 19 Sep 2007
Posts: 363
Location: Southeast Georgia
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| Posted: Fri Sep 25, 2009 4:19 am Post subject: Re: Help please - can't take off |
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| John Hauck wrote: | I am happy for you.
Glad you found your problem.
Usually, I find my problems are something I have "messed" with, changed,
adjusted, etc.
john h
mkIII
Rock House, Oregon |
Yes, a little embarrassing, but a lot of good things came out of it. Clean air filters, new style cup, new compensation tubes, and a lot of good advice to check when the engine isn't running right...even things that the repair manual doesn't mention, so maybe someone else will find this thread helpful when theirs isn't running right.
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_________________
Cristal Waters
Kolb Mark II Twinstar Rotax 503 DCSI Sept 2007 - sold Sept 2012
Private Pilot Aug 2008
ELSA Repairman for N193Y April 2008
Rotax 2 stroke maintenance April 2009 |
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Fri Sep 25, 2009 10:12 am Post subject: Help please - can't take off |
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Now that you have it running again and you've gone to all the trouble to go through the carbs, go the final step and synch the carbs. For the two strokes it is a very simple process and the equipment to do it cost less than $5. The whole process is detailed in the Heavy Maintenance Manual for the 462-532-582 series engines. Unfortunately you can't download this from ROAN so you'll have to know someone with a paper copy. I can scan it if you can't find it locally.
Rick Girard
do not archive
On Fri, Sep 25, 2009 at 7:19 AM, cristalclear13 <cristalclearwaters(at)gmail.com (cristalclearwaters(at)gmail.com)> wrote:
[quote]--> Kolb-List message posted by: "cristalclear13" <cristalclearwaters(at)gmail.com (cristalclearwaters(at)gmail.com)>
John Hauck wrote:
> I am happy for you.
>
> Glad you found your problem.
>
> Usually, I find my problems are something I have "messed" with, changed,
> adjusted, etc.
>
> john h
> mkIII
> Rock House, Oregon
Yes, a little embarrassing, but a lot of good things came out of it. Clean air filters, new style cup, new compensation tubes, and a lot of good advice to check when the engine isn't running right...even things that the repair manual doesn't mention, so maybe someone else will find this thread helpful when theirs isn't running right.
--------
Cristal Waters
Kolb Mark II Twinstar
Rotax 503 DCSI
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=264896#264896
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fishhawk16(at)yahoo.com
Guest
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| Posted: Fri Sep 25, 2009 12:14 pm Post subject: Help please - can't take off |
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Hi Rick I think U started something cause I also would like a copy
Thanks
Bill
FS 2
#682
503 dcdi
--- On Fri, 9/25/09, HGRAFF(at)aol.com <HGRAFF(at)aol.com> wrote:
| Quote: |
From: HGRAFF(at)aol.com <HGRAFF(at)aol.com>
Subject: Re: Re: Help please - can't take off
To: kolb-list(at)matronics.com
Date: Friday, September 25, 2009, 7:04 PM
Rick,
I as well would like to get a simple (and low cost) process of synchronizing 2 cycle carbs.
So, if you scan that section in your manual, could you shoot me a copy as well?
Thanks much,
Herb Graff
Mark III, 246KT
In a message dated 9/25/2009 2:13:30 P.M. Eastern Daylight Time, aslsa.rng(at)gmail.com writes:
| Quote: | Now that you have it running again and you've gone to all the trouble to go through the carbs, go the final step and synch the carbs. For the two strokes it is a very simple process and the equipment to do it cost less than $5. The whole process is detailed in the Heavy Maintenance Manual for the 462-532-582 series engines. Unfortunately you can't download this from ROAN so you'll have to know someone with a paper copy. I can scan it if you can't find it locally.
Rick Girard
do not archive
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