Today's Message Index:
----------------------
1. 02:59 AM - Re: Rough running 912 UL (vernon mitchell)
2. 06:44 AM - Re: Rough running 912 UL (Jeff Wemmering)
3. 12:44 PM - Re: Rough running 912 UL (Dee LeBlanc)
Message 1
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| Subject: | Re: Rough running 912 UL |
Have you had the carbs balanced? That is a sure sign. Also check the
Idle jets. We had a lot of problems on a ULS with the idle jets.
Good luck,
Vernon.
From: Hugh McKay
Sent: Sunday, September 4, 2016 1:14 AM
Subject: RotaxEngines-List: Rough running 912 UL
Started to fly my Allegro 2000 (912 UL engine) today and suddenly my
engine is running rough. On some earlier flights I noticed the engine
wanting to =9Cburp=9D or =9Cskip=9D a little bit
at idle and low rpms (2000 to 2500), however at higher rpms it seemed to
smooth out. I had no symptoms while in flight.
However, today when I started the engine it again was
=9Cskipping=9D at low rpms. Went through the check list and
came to the point where I checked both ignitions at 4000 rpm. Ran the
engine up to 4000 rpm and turned off one ignition. The engine suddenly
ran very rough. When I checked the other ignition the same thing
happened. To say the least I did not fly. took it back to the hanger and
parked it.
Any suggestions as to what the problem may be?
Hugh G. McKay III
Denver, NC 28037
Allegro 2000
Rotax 912 UL
780 hours TSN
Ph. 704-661-8271
email hgmckay@bellsouth.net
Message 2
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| Subject: | Re: Rough running 912 UL |
The fact that it happened so fast between one flight and another I would foc
us on electronic ignition. They will probably have to be replaced if they ar
e the old type. $1,000.00
Sent from my iPad
> On Sep 3, 2016, at 9:54 PM, Richard Girard <aslsa.rng@gmail.com> wrote:
>
> Have you checked the ignition boxes to see if they are the known bad ones?
Does the engine exhibit any trouble starting? Have you checked for a broken
spark plug? When was the last time you trimmed and reseated the plug wires a
t each end (they screw on)?
>
> Rick Girard
>
>> On Sat, Sep 3, 2016 at 6:14 PM, Hugh McKay <hgmckay@bellsouth.net> wrote:
>> Started to fly my Allegro 2000 (912 UL engine) today and suddenly my engi
ne is running rough. On some earlier flights I noticed the engine wanting to
=9Cburp=9D or =9Cskip=9D a little bit at idle and l
ow rpms (2000 to 2500), however at higher rpms it seemed to smooth out. I ha
d no symptoms while in flight.
>>
>> However, today when I started the engine it again was =9Cskipping
=9D at low rpms. Went through the check list and came to the point where I
checked both ignitions at 4000 rpm. Ran the engine up to 4000 rpm and turne
d off one ignition. The engine suddenly ran very rough. When I checked the o
ther ignition the same thing happened. To say the least I did not fly. took i
t back to the hanger and parked it.
>>
>> Any suggestions as to what the problem may be?
>>
>> Hugh G. McKay III
>> Denver, NC 28037
>> Allegro 2000
>> Rotax 912 UL
>> 780 hours TSN
>>
>> Ph. 704-661-8271
>> email hgmckay@bellsouth.net
>
>
>
> --
> =9CBlessed are the cracked, for they shall let in the light.=9D
Groucho Marx
>
>
Message 3
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| Subject: | Re: Rough running 912 UL |
Yes, carbs have been dynamically balanced; new floats; new carb
rebuilds; new plugs; new carb boots; etc. Since purchase, engine has
run rough between 2200-2800 rpm=99s. Do know why??
Regarding your rough running engine, it's my understanding that if you
isolate the two carsb by pinching the balance line and the engine runs
rough, this is an indication that the carbs are not balanced correctly.
This is per the rotax-owner website.
Dee LeBlanc
leblancds@cox.net
cell 225-802-1038
~~~~~~~~~~~~~~~~
The Past is History
The Future is a Mystery
Today is a Gift
That=99s Why They Call it the Present
> On Sep 4, 2016, at 4:55 AM, vernon mitchell <vernon11@xsinet.co.za>
wrote:
>
> Have you had the carbs balanced? That is a sure sign. Also check the
Idle jets. We had a lot of problems on a ULS with the idle jets.
> Good luck,
> Vernon.
>
> From: Hugh McKay <mailto:hgmckay@bellsouth.net>
> Sent: Sunday, September 4, 2016 1:14 AM
> To: Rotax Engines <mailto:rotaxengines-list@matronics.com>
> Subject: RotaxEngines-List: Rough running 912 UL
>
> Started to fly my Allegro 2000 (912 UL engine) today and suddenly my
engine is running rough. On some earlier flights I noticed the engine
wanting to =9Cburp=9D or =9Cskip=9D a little bit
at idle and low rpms (2000 to 2500), however at higher rpms it seemed to
smooth out. I had no symptoms while in flight.
>
> However, today when I started the engine it again was =9Cskipping
=9D at low rpms. Went through the check list and came to the point
where I checked both ignitions at 4000 rpm. Ran the engine up to 4000
rpm and turned off one ignition. The engine suddenly ran very rough.
When I checked the other ignition the same thing happened. To say the
least I did not fly. took it back to the hanger and parked it.
>
> Any suggestions as to what the problem may be?
>
> Hugh G. McKay III
> Denver, NC 28037
> Allegro 2000
> Rotax 912 UL
> 780 hours TSN
>
> Ph. 704-661-8271
> email hgmckay@bellsouth.net
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