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gfmjr_20(at)hotmail.com
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 Posted: Tue Feb 14, 2006 6:15 pm Post subject: Rotx 912s Choke |
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List--
I just finished
installing the choke cables ,for the second time, trying to get them to
require a little
less force when engaging the choke, without much success. The springs appear
to be very strong.
It seems to take a significant force to fully open the choke, and yet if I
let go of the knob it
closes fully.
A question for those that have installed and/or are flying with the 912s.
Does this sound correct? And if so, how do you hold the choke open with
one hand, set the throttle and trun the key to start the engine all at the
same time.
Thanks
George My
601XL 912s
On the road to retirement? Check out MSN Life Events for advice on how to
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zodierocket(at)hsfx.ca
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mike.sinclair(at)ATT.NET
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| Posted: Tue Feb 14, 2006 7:19 pm Post subject: Rotx 912s Choke |
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George
Sounds like you've got your choke set pretty smooth if it closes on it's own. I
have to push mine in, though with not much pressure. As for the throttle, it
needs to be closed (choke is ineffective at any other position) and if you have
the friction block set-up properly adjusted (providing that is how your throttle
is rigged), it's pretty much hands off. As the engine starts to run smoothly the
choke needs to go in anyway. Two hands are plenty sufficient to the task. On
mine I have found that after the first cold start of the day, the choke has been
unnecessary for subsequent starts, even after a few hours.
Mike Sinclair N701TD
george may wrote:
| Quote: |
List--
I just finished
installing the choke cables ,for the second time, trying to get them to
require a little
less force when engaging the choke, without much success. The springs appear
to be very strong.
It seems to take a significant force to fully open the choke, and yet if I
let go of the knob it
closes fully.
A question for those that have installed and/or are flying with the 912s.
Does this sound correct? And if so, how do you hold the choke open with
one hand, set the throttle and trun the key to start the engine all at the
same time.
Thanks
George My
601XL 912s
>
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>
>
On the road to retirement? Check out MSN Life Events for advice on how to
get there! http://lifeevents.msn.com/category.aspx?cid=Retirement
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webmaster(at)upac.ca
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| Posted: Wed Feb 15, 2006 6:06 am Post subject: Rotx 912s Choke |
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George, on mine I have to hold the choke handle out with my hand for
a couple of minutes while it warms up. The springs are very strong.
But whatever you do, don't EVER change them for something less
strong, same thing (especially) for the throttle springs!!
I do have a choke "lever" in my spare parts kit that could be
installed as an alternative. The lever is like this one:
http://mikes.automated-shops.com/cgi-bin/webc.cgi/st_prod.html?
p_prodid=290&p_catid
This choke activator stays put when you activate it, flip it off when
you're done.
Trev Page
C-IDUS 601HD R912
On Feb 14, 2006, at 9:12 PM, george may wrote:
| Quote: |
List--
I just finished
installing the choke cables ,for the second time, trying to get
them to
require a little
less force when engaging the choke, without much success. The
springs appear
to be very strong.
It seems to take a significant force to fully open the choke, and
yet if I
let go of the knob it
closes fully.
A question for those that have installed and/or are flying with the
912s.
Does this sound correct? And if so, how do you hold the choke open
with
one hand, set the throttle and trun the key to start the engine all
at the
same time.
Thanks
George My
601XL 912s
>
On the road to retirement? Check out MSN Life Events for advice on
how to
get there! http://lifeevents.msn.com/category.aspx?cid=Retirement
|
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gfmjr_20(at)hotmail.com
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| Posted: Wed Feb 15, 2006 12:36 pm Post subject: Rotx 912s Choke |
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Mark,Mike and Trevor,
Thanks for the reply info on the choke cables. I guess
things are ok as is. Even though I had no intention of messing with the
springs, I appreciate your warnings.
George
601XL 912s
do not archive
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ggower_99(at)yahoo.com
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| Posted: Wed Feb 15, 2006 4:45 pm Post subject: Rotx 912s Choke |
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Hello George,
This is how Succesfully I start my engine cold everytime with no problem. Yes, I used to flood it, discharge the batery, or just get mad... Until this way the engine starts 99 times out of 100, (Perfection is not human 
1.- I have my idle (warm) set at 1,900 rpms full throttle pull (off). Yes, the best idle is 2,000 but this gives me less "pull" of the engine at last final approach.
2.- To start the engine you dont need any throttle movement, If you push the throttle more than 10 mm (in my 701) the chokes will not work and the engine will not start.
3.- I adjust the trottle only about 3 to 5mm push. NO more or it will not start.
4.- Step hard in both brakes, just in case you aply accidentally to much trottle when the engine starts. Dont laugh, it happens very often....
4.- With one hand pull full the choke (this is hold ONLY for 2 or 3 seconds of engine running) , Shout CLEAR! and look around for kids and dogs. With the other hand turn start the key. it will start very easy and at about 2,100 to 2300 rpms, in 2 or 3 seconds release the choke completly, look at the oil pressure (60 lbs) and then adjust gently the trottle to 2,500 for about 2 or 3 minutes, then thottle back to 2,000 until the oil temp reaches 50 C (or 120 F if I am correct). This will take about 5 to 7 minutes.
IMPORTANT: Never idle the engine under 2,000 rpms, is harmfull (shaking) for plane and engine.
The good thing about needing to warm the Rotax engine for about 10 minutes is that the engine will stop before take off, if we forgot to open the gasoline valve
Hope this helps, if no one has a better experience... Here we dont have very cold mornings, even on winter, for real cold climates could be a diferent procedure (?)
Saludos
Gary Gower.
701 912S Flying from Chapala, Mexico.
george may <gfmjr_20(at)hotmail.com> wrote:
List--
I just finished
installing the choke cables ,for the second time, trying to get them to
require a little
less force when engaging the choke, without much success. The springs appear
to be very strong.
It seems to take a significant force to fully open the choke, and yet if I
let go of the knob it
closes fully.
A question for those that have installed and/or are flying with the 912s.
Does this sound correct? And if so, how do you hold the choke open with
one hand, set the throttle and trun the key to start the engine all at the
same time.
Thanks
George My
601XL 912s
---------------------------------
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thilo.kind(at)gmx.net
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| Posted: Sat Feb 18, 2006 2:36 pm Post subject: Rotx 912s Choke |
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Hi George,
I remember, that the choke was very hard to pull in my case as well. I had
to re-route the choke cable to avoid sharp bends. It still his hard to pull
plus I have to push to get it back in.
Starting procedure in my case is simply: I pull chike and throttle and hold
both with one hand (choke and throttle are next to each other). Then start
engine. Once the engine starts I adjust the throttle to say 2,500 RPM and
push the choke back in. Don't have to wait for the engine to really warm up.
Good luck
Thilo
---
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David X
Joined: 10 Jan 2006
Posts: 154
Location: Princeton, NJ, USA
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| Posted: Sat Feb 18, 2006 5:19 pm Post subject: Re: Rotx 912s Choke |
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My choke is very stiff as well. With proper cable lubrication, it will settle to the off position in a few seconds on its own. Throttle full off, friction lock on, choke full on, hold choke with left hand, turn key with right hand.
The previous two posts are pretty much the same as written in the Rotax operator's manual. The throttle should be full off, or just a tad forward of off. No need to pump the throttle in and out like a Lycoming or Continental. You just risk starting a fire. You really don't need to run the choke more than a few seconds after start (it's not needed and it blackens the plugs if you run choke for very long).
I've started in 20F degree weather with this proceedure ... not even a hesitation in start-up. After start-up, keep RPM between 2000 and 2500 until you see the oil and water temp guages start to move, then you can rev a little higher to get it rolling down the taxiway.
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Zodiac 601 XL - CZAW Built - Rotax 912S
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jim(at)pellien.com
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| Posted: Mon Feb 20, 2006 2:31 pm Post subject: Rotx 912s Choke |
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All,
David's absolutely right. I start my engine using the same start-up procedure, and it works perfectly every time......even when it is 19 degrees as it was yesterday. The choke gets easier to use with time. I now have 125 hours and it almost stays all the way out by itself.
Jim
Jim Pellien
Mid-Atlantic Sports Planes
The Mid-Atlantic Center of SportsPlanes.com
www.MASPL.com
703-313-4818
Jim(at)Pellien.com
--------
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