Today's Message Index:
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1. 04:53 AM - Re: engine noise on radio (Fred Messinger (fredm))
2. 10:21 AM - Re: engine noise on radio (Guy Buchanan)
3. 01:27 PM - egt probe, wrong location how bad (Dave G)
4. 02:14 PM - Carb Balance (Rich L)
5. 03:18 PM - Re: Carb Balance (Roger Lee)
6. 03:21 PM - Re: egt probe, wrong location how bad (Roger Lee)
Message 1
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| Subject: | Re: engine noise on radio |
Hi Jack,
I had that problem too in my trike for a while. I had placed the output
coax of my radio too close to the intercom system. When I moved it 2-3
inches away, the interference stopped.
Fred
On Sun, Aug 2, 2009 at 6:10 PM, <pt19@localnet.com> wrote:
> Having problems with background noise from 582 engine when transmitting.
> Is there a mic that will reduce or eliminate this noise?
>
> Thanks, Jack
>
> *
>
> *
>
>
Message 2
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| Subject: | Re: engine noise on radio |
At 03:10 PM 8/2/2009, you wrote:
>Having problems with background noise from 582 engine when
>transmitting. Is there a mic that will reduce or eliminate this noise?
If the noise is coming in through the mic, turn down the mic gain and
talk loud. It sounds silly but it works really well to raise the
signal / noise ratio. It's not my idea but an old trick from open
cockpit days. Also you can buy larger foam muffs to go over the mic,
however they basically do the same thing - mechanically reducing the
mic gain so you have to talk louder.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 400 hrs. and counting
Message 3
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| Subject: | egt probe, wrong location how bad |
My 582 operating for about 300 hours has the EGT probe mounted into the
manifold about 1/2" from the exhaust flange. I know this will result in
an incorrect reading, but how much will it be off?
Message 4
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I balance my own 912uls so today I tried to do a 914. We followed the same procedure
as the 912 but ended up with it being balanced at 1800 and 3700 up to 4500
rpm. We didn't go above 4500 on the ground. There was a difference of 10
or so on the differential gages in between 1800 and 3700 rpm then it evened out.
Is there a problem with one or the other carb?
Rich
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=255855#255855
Message 5
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| Subject: | Re: Carb Balance |
Hi Rich,
The 1800 should be at idle and set with the idle adjustment screw. When you get
up to your 3700 then that is adjusted with the bowden cable. They can be different,
but you should be able to set the idle and then bring up the throttle and
dial that vacuum in, too. When done you should have them on the gages as balanced
at idle and at whatever rpm you chose to balance at higher rpms. Sometimes
carbs are easy to balance and sometimes they are a PITA. Some times the needles
on the gages stay together well and sometimes they lag just a little, but
they should settle fairly quickly to be equal. Every carb balance can be a
little different. Every 912 engine should have the carbs balanced at 100 hours
or the annual which ever comes first. They will always be out of balance just
do to wear and tear and a few other factors. This procedure is a must for the
health and longevity of the engine. Once you do it a couple of times it gets
easier and you will know exactly which carb to adjust over the other to make your
work faster.
So long as they both balanced your good to go.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=255869#255869
Message 6
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| Subject: | Re: egt probe, wrong location how bad |
If it is too close it will read hotter, too far and it will be cooler. Cap or plug
the other hole and just re-drill at the proper distance. I don't know if there
is a way to tell how many degrees you might be off. Most likely not a lot,
but they do have a reason for the correct distance.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=255870#255870
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