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rexjan(at)bigpond.com
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 Posted: Sun Mar 18, 2007 5:03 pm Post subject: Bing Carb Flooding |
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Hi ! Guys,
I have a Bluehead 582 about 150 hours old so I would not
expect worn parts and they certainly look ok. However every now and then
the back carby floods. When it does I get rough running down low. If the
motor is not running then I get some dribbling out of those two little holes
in the vent loop. It only does it several weeks apart. If I pull the bowl I
can't find anything either in the bowl or needle and seat. It's a worry
because it drips on the muffler. In flight I just give it full throttle and
back off again and it's fine. On the ground if I pull the bowl off I find
nothing and all is fine when I put it back. Being intermittent like that it
makes it very hard to find. It's always only the back bowl and theoretically
nothing can get to the needle and seat anyway. I have a filter and a
gascolator. Any common problems like this or any ideas would be
appreciated. Thanks in advance, Rex.
rexjan(at)bigpond.com
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trevorkebb(at)earthlink.n
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| Posted: Mon Mar 19, 2007 3:28 pm Post subject: Bing Carb Flooding |
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Folks:
I will be interested to hear what others say about this as I have had the
same intermittent problem with my 350 hour greyhead, and on the rear carb
only. Wierd. LEAF advised me to check the fuel levels -1/2"- in the bowls,
and the plunger that the floats work against to shut off fuel; its viton tip
should be clear of debris and not worn. My was clean and not worn and float
levels are good, but I found the rear float in the rear carb binding in the
down position. If you pushed it down with fuel in the bowl it would not
float back up. So I changed the rear float in each carb for the new style
that has beveled corners. Now there is no possibility that either float will
bind in either carb. But I still don't know if that was the problem. I
suspect not. The annual will be finished on the plane soon and we'll have to
see how it goes then.
Robert
| Quote: | Hi ! Guys,
I have a Bluehead 582 about 150 hours old so I would not
expect worn parts and they certainly look ok. However every now and then
the back carby floods. When it does I get rough running down low. If the
motor is not running then I get some dribbling out of those two little
holes
in the vent loop. It only does it several weeks apart. If I pull the bowl
I
can't find anything either in the bowl or needle and seat. It's a worry
because it drips on the muffler. In flight I just give it full throttle
and
back off again and it's fine. On the ground if I pull the bowl off I find
nothing and all is fine when I put it back. Being intermittent like that
it
makes it very hard to find. It's always only the back bowl and
theoretically
nothing can get to the needle and seat anyway. I have a filter and a
gascolator. Any common problems like this or any ideas would be
appreciated. Thanks in advance, Rex.
rexjan(at)bigpond.com
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dosmythe(at)cox.net
Guest
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| Posted: Mon Mar 19, 2007 4:12 pm Post subject: Bing Carb Flooding |
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Rex,
I've had a similar problem several times. I've never been able to quite
figure out the exact cause but, it has to do with very very carefully
seating the bowls. I now use one finger on the bottom of the bowl and
look/feel for a perfect fit. My old problems went away. Also, another
point is that I switched to new carb floats that have a bevel on the edges.
They float better without causing any obstructions. Not sure if this might
be your problem but sounds familiar.
Don Smythe
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fox5flyer(at)idealwifi.ne
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| Posted: Mon Mar 19, 2007 4:14 pm Post subject: Bing Carb Flooding |
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I don't know if this has anything to do with the problem or the fix, but
back when I had my Model II with gray head 582 I had a big problem (from the
git-go) with the engine running very rough at idle, but as the rpms went up
the engine would smooth out, but not until it got over 3k. At 2k idle it
would shake so badly that the floats would overfill the bowls and fuel would
pour out the vents. Obviously, this overfilling of the bowls just
exacerbated the problem so it was difficult to see what the actual problem
was, especially since the float levels were set to factory settings. I
fooled around with it for awhile changing needles, balance, etc., and while
a friend was over we were discussing what to do because everything was brand
new and we felt that there was probably nothing actually wrong with the
carbs. As we talked about it one of us said something about the idle jets
maybe being too rich as the carbs may have been assembled for a different
altitude. I thought it was worth a try so I ordered from Spruce a set of
idle jets the next size leaner and voila! Smoothed right out! End of
problem. Of course, I had to make the usual twice a year change to the
mains to compensate for the wild temp swings here in Michigan, but actually
never had any fuel related problems again for 400 hours.
Hope this might help a little bit.
Deke
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mlpaton2000(at)yahoo.com
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| Posted: Tue Mar 20, 2007 3:19 am Post subject: Bing Carb Flooding |
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thanks for this info , have been having the same prob , will try jets
9J-FOX
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7suds(at)Chartermi.net
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| Posted: Tue Mar 20, 2007 6:32 pm Post subject: Bing Carb Flooding |
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Deke,
Interesting, had a similar problem with the 503DCDI in my 4, but on the top
end. Idle was great but on the way back from Oshkosh one year (very hot0
developed a miss and decided to land at a little grass strip in Wisconsin,
tried changing plugs but still had the miss and was not comfortable leaving
the ground, finally tried pulling the air filters and that allowed the
engine to lean out enough to clear up. When I got home I ordered different
mains and would have to change main jets for really hot weather.
Lloyd
* Prove all things; hold fast that which is good. 1 Thes. 5:21 *
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fox5flyer(at)idealwifi.ne
Guest
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| Posted: Wed Mar 21, 2007 4:17 am Post subject: Bing Carb Flooding |
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These small, but high horsepower 2-strokers are great engines and if
properly maintained will provide great performance for a reasonable price.
I've flown behind both the 503 and 582, and although completely different
powerplants, they both did their jobs well attached to the airplanes that
were designed for them. The only thing that was a minus (IMO) was that they
required periodic tinkering to keep them in top performance. One of the big
things was the jetting that was very sensitive to ambient temperature, but
once it was understood it was just a matter of making occasional jet changes
to keep things ticking efficiently. I spent about $75 on idle and main jets
and kept them in the airplane. It took nearly as long to get the cowlings
off as it did to change out jets so tuning was a very minor issue.
The other important thing that required periodic adjustment was the prop.
As things cooled off or heated up the air density would put more or less
load on the prop and an adjustment would need to be made to keep takeoff
RPMs and EGTs in an acceptable range. Obviously one can't be changing
things as the temps of the day change as one would be tinkering more than
flying, but as the seasons change...
Sorry for the rambling it's early in the morning and once my coffee takes
effect I tend to do that. 
What I meant to ask was how was the performance of the 503 in your IV?
Deke
| Quote: |
Deke,
Interesting, had a similar problem with the 503DCDI in my 4, but on the
top
|
| Quote: | end. Idle was great but on the way back from Oshkosh one year (very hot0
developed a miss and decided to land at a little grass strip in Wisconsin,
tried changing plugs but still had the miss and was not comfortable
leaving
|
[quote] the ground, finally tried pulling the air filters and that allowed the
engine to lean out enough to clear up. When I got home I ordered different
mains and would have to change main jets for really hot weather.
Lloyd
* Prove all things; hold fast that which is good. 1 Thes. 5:21 *
---
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kr2(at)earthlink.net
Guest
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| Posted: Thu Mar 22, 2007 7:44 pm Post subject: Bing Carb Flooding |
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Rex, I have a 447 on my aventura and experienced the same problem,I rebuilt
the carbs with a carb kit from lockwood and it solved my problem,be sure to
replace that little tiny ..o..ring tthat comes with the kit for your low
idle speed jet....
hopes this helps.....Mark N61AC
| Quote: | [Original Message]
From: Rex & Jan Shaw <rexjan(at)bigpond.com>
To: <kitfox-list(at)matronics.com>
Date: 3/18/2007 9:08:11 PM
Subject: Bing Carb Flooding
Hi ! Guys,
I have a Bluehead 582 about 150 hours old so I would not
expect worn parts and they certainly look ok. However every now and then
the back carby floods. When it does I get rough running down low. If the
motor is not running then I get some dribbling out of those two little
holes
|
| Quote: | in the vent loop. It only does it several weeks apart. If I pull the bowl
I
|
| Quote: | can't find anything either in the bowl or needle and seat. It's a worry
because it drips on the muffler. In flight I just give it full throttle
and
|
| Quote: | back off again and it's fine. On the ground if I pull the bowl off I find
nothing and all is fine when I put it back. Being intermittent like that
it
|
| Quote: | makes it very hard to find. It's always only the back bowl and
theoretically
|
| Quote: | nothing can get to the needle and seat anyway. I have a filter and a
gascolator. Any common problems like this or any ideas would be
appreciated. Thanks in advance, Rex.
rexjan(at)bigpond.com
|
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