Today's Message Index:
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1. 04:39 AM - Re: 912f gearbox question (Thom Riddle)
2. 04:06 PM - New changes in shipping 900 series (rampil)
3. 07:11 PM - Rotax 912 Idle Speed Setting (Hugh McKay III)
4. 07:36 PM - Re: Rotax 912 Idle Speed Setting (george may)
Message 1
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| Subject: | Re: 912f gearbox question |
I believe that will depend upon whether or not you have the slipper
clutch installed. If you have not modified it since new, you should be
able to contact Rotax distributor with the serial number to see what
was originally installed in your gearbox. The only other way I know to
be sure is to remove the gearbox and measure the gear sets.
Thom in Buffalo
Message 2
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| Subject: | New changes in shipping 900 series |
Seen at Sun & Fun 2007
New fuel hoses to carbs
New fuel flow splitter
New ignition module brackets which hold and stabilize connectors
--------
Ira N224XS
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| Subject: | Rotax 912 Idle Speed Setting |
On a new Rotax 912 engine has the idle speed adjustment screw (throttle arm
idle screw) on the carbs. been set by Rotax at the factory to limit the idle
rpm to the number given in the Operators Manual (1400+/-), or does this have
to be set by the engine installer as described in the Rotax Line Maintenance
Manual, Section 4.1.2, page 18? Based on my understanding the 912 UL engine
will not start unless the throttle is completely closed, and choke open
(Cold Engine). If the throttle arm idle screw is resting on the carb. Idle
stop as described on page 19 of the Maintenance Manual, the throttle is not
completely closed, so how can the engine start in this condition (i.e. the
completely closed throttle position is not the idle speed position)?
I have done nothing to these carb. adjustments and my engine can be
throttled back below 1400 rpm (i.e. it appears that the throttle arm idle
screw is not in the correct position). I need some help with this matter.
How do you reconcile a completely closed throttle to start an engine with a
throttle arm idle screw set for 1400 rpm (i.e. throttle partially open)?
Help!!!
Hugh McKay in NC
Allegro 2000
Rotax 912 UL
N661WW
Message 4
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| Subject: | Rotax 912 Idle Speed Setting |
Hugh--
With the throttle closed and the choke open for starting, the idle set
screws WILL hold the throttle valves open just a bit----in your case 1400.
Typically this has been roughly set at the factory, however, they still need
to be set per the mechanical synchronizing as described in the Rotax manual.
This mechanical synchronizing can then be followed up utilizing gauges .
Based on your description of the current condition of your setting, your
engine should start with no problem. you can then check for synchronizing.
George May
601XL 912s---70 hours
>From: "Hugh McKay III" <hgmckay@bellsouth.net>
>To: <rotaxengines-list@matronics.com>
>Subject: RotaxEngines-List: Rotax 912 Idle Speed Setting
>Date: Fri, 4 May 2007 22:09:17 -0400
>
>On a new Rotax 912 engine has the idle speed adjustment screw (throttle arm
>idle screw) on the carbs. been set by Rotax at the factory to limit the
>idle
>rpm to the number given in the Operators Manual (1400+/-), or does this
>have
>to be set by the engine installer as described in the Rotax Line
>Maintenance
>Manual, Section 4.1.2, page 18? Based on my understanding the 912 UL engine
>will not start unless the throttle is completely closed, and choke open
>(Cold Engine). If the throttle arm idle screw is resting on the carb. Idle
>stop as described on page 19 of the Maintenance Manual, the throttle is not
>completely closed, so how can the engine start in this condition (i.e. the
>completely closed throttle position is not the idle speed position)?
>
>I have done nothing to these carb. adjustments and my engine can be
>throttled back below 1400 rpm (i.e. it appears that the throttle arm idle
>screw is not in the correct position). I need some help with this matter.
>How do you reconcile a completely closed throttle to start an engine with a
>throttle arm idle screw set for 1400 rpm (i.e. throttle partially open)?
>Help!!!
>
>Hugh McKay in NC
>Allegro 2000
>Rotax 912 UL
>N661WW
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