Today's Message Index:
----------------------
1. 02:57 AM - ignition problem (vann covington)
2. 06:54 AM - Re: ignition problem (Roger Lee)
3. 06:59 AM - Re: ignition problem (Richard Girard)
4. 02:30 PM - Re: ignition problem (Alan Carter)
5. 08:04 PM - Re: ignition problem (vanncovi)
Message 1
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| Subject: | ignition problem |
Hey Guys, I'm a lurker with a problem.- I recently had an ignition proble
m with my 912 uls.- The right side of the dual ignition is not firing at
all when cold and very little when at operating temp.- I know- this can
be an expensive problem.- I have new plugs.- This happened suddenly.
- Flew great one day and discovered the problem during preflight the next
morning.- This is an older rebuilt engine.- I have 200 trouble free ho
urs on it.- I have yet to begin trouble shooting.- Any ideas would be a
ppreciated.- Can the work on the coils be done without removing the engin
e.- Thanks, Vann, North Carolina, N701EV=0A
Message 2
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| Subject: | Re: ignition problem |
Hi van,
A common problem is a loose or broken wire up on the ignition module plugs.
Check those really well. Pull on each on to see if it comes out of the plug or
may be broken under the wire insulation. Follow the wires as one may have rubed
through on something and is broken. If this doesn't work out then swap the ignition
module plugs A for B at the connectors. If the problem stays on the affected
side then it is an issue after the ignition modules. If it changes sides
then it is a problem before the modules. In the later case you will need to
get and ohm meter and the Rotax Heavy Maint. Manual and look under the ignition
system section and do a little testing at the module plugs that go back towards
the coils.
It's usually just a bad wire up at the module plugs so look carefully.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=378496#378496
Message 3
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| Subject: | Re: ignition problem |
Do the cheap thing first, look for bad grounds. It's amazing how a circuit
can keep working until the last little bit of contact is corroded.
Sometimes a humid night is all it takes.
Rick Girard
On Tue, Jul 17, 2012 at 4:56 AM, vann covington <vanncovi@yahoo.com> wrote:
> Hey Guys, I'm a lurker with a problem. I recently had an ignition problem
> with my 912 uls. The right side of the dual ignition is not firing at all
> when cold and very little when at operating temp. I know this can be an
> expensive problem. I have new plugs. This happened suddenly. Flew great
> one day and discovered the problem during preflight the next morning. This
> is an older rebuilt engine. I have 200 trouble free hours on it. I have
> yet to begin trouble shooting. Any ideas would be appreciated. Can the
> work on the coils be done without removing the engine. Thanks, Vann, North
> Carolina, N701EV
>
> *
>
> *
>
>
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
Message 4
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| Subject: | Re: ignition problem |
Hello.
I am new to the Forum, i can not find you problem on the forum, I have
just purchased a Europa with a 914.
I have detail my Mag problem in the Europa list.
Basically i had a mag drop of about +500 on the Key left position and
rough running.
1. i had to determine which mag was on the left key position, so removed
all the top HT leads, run the engine and on mine when i turned the key
from Both to Left, the engine stopped.
so now i had determined the =9CL=9D position is driving the
Lower Cylinders, and =9CR=9D the upper cylinders spark
plugs.
2. So my problem was on the =9CL=9D ie the bottom ,so traced
back to the Mag Coils and now determined which set of Coils drive the
lower plugs.
3.So now i know my engine a little better, start with the simple, swap
top plugs to bottom, or replace all 4 bottom plugs, Check engine, same
problem.
4.Swap Caps top to bottom or =9Creplace bottom caps,(ie at
=C2=A333 each) i don,think so=9D. Check engine, same problem.
5.Swap HT leads top with bottom, To much trouble, best here to buy some
lead 2 meters cost about =C2=A3 25 , a real rip off, car HT lead is less
than =C2=A31 a meter. I paid =C2=A325.
6.Changing the HT leads, if you problem is with the leads that go to the
top set of mag coils you can get at them.
However if you problem is with the HT leads that go to the lower Mag
coil set , it a Pigs Ear of a job, you have to un bolt the induction
manifold and lift or remove it , to get at the HT leads or the Coils.
So now you have managed to put new leads on, (either the Top or the
Bottom according to you problem) Check the engine, the B**** problem is
still there.
7. So now do it all over again, this time you have more nuts to undo,
and the two Coils you have already established as the area or trouble ,
Now swap the HT leads over in these coils.
Run the engine, now if you problem was originally on the Left mag, but
now it is the Right mag, you have the little blighter,
So replace the Faulty Coil , put it all back together, run the engine
and all is well, Coil is about =C2=A3275
Time from start to Finish say 8 hour lot of trial and Error fault
tracing.
So as to know my engine, i have used coloured cable ties on the cables
and plug caps, and marked my Key position with a Red and Green marker
Mine is =9CL=9D Key position RED and all cables and caps
with Red Ties. (bottom plugs)
=9CR=9D Key position Green and all cables and caps with
Green Ties (top plugs)
So i know which is which next time
The two Black boxes the Ignition A and B ECU you can swap these over
, just make sure you mark the wires first.
However as far as i know when one of these go, the engine will not go
on that side, or its really runs rough, more often a coil than this.
Me , this is my first Aeroplane, i just now a little from motor cycles ,
but i fixed mine
For me it would have been engineer , =C2=A31 per mile travelling so
=C2=A3300 , then say =C2=A3300 for doing the job and =C2=A3300 for the
part so a =C2=A31000 about
Alan
From: vann covington
Sent: Tuesday, July 17, 2012 10:56 AM
Subject: RotaxEngines-List: ignition problem
Hey Guys, I'm a lurker with a problem. I recently had an ignition
problem with my 912 uls. The right side of the dual ignition is not
firing at all when cold and very little when at operating temp. I know
this can be an expensive problem. I have new plugs. This happened
suddenly. Flew great one day and discovered the problem during
preflight the next morning. This is an older rebuilt engine. I have
200 trouble free hours on it. I have yet to begin trouble shooting.
Any ideas would be appreciated. Can the work on the coils be done
without removing the engine. Thanks, Vann, North Carolina, N701EV
Message 5
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| Subject: | Re: ignition problem |
Thanks, guys for the ideas. I will give the wiring a thorough check before I get
too worried about my wallet.
Vann, N701EV
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=378585#378585
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