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fuse holder and starting procedure

 
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Dee One



Joined: 29 Jun 2015
Posts: 47

PostPosted: Sun Sep 04, 2016 9:02 am    Post subject: fuse holder and starting procedure Reply with quote

I am looking to replace a missing fuse holder like the one shown in the photo. Would you happen to know where I can find one of these unique screw-in fuse holder?

Secondly, I'm new to Allegro. I'm having starting issues. When I pulled the prop through to check the oil and then try to start the engine with the auxiliary fuel pump on, I believe the engine may be flooded. Conversely, if I try to start the engine with one half inch joke, auxiliary fuel pump off, and throttle off, I think it may not be getting enough fuel. I have run down two batteries so far. What is your recommendation for starting on a warm sunny day, roughly 80 F to 90 F ? (hope the photo is viewable. There is no "posted attachments" to click on per the instructions)

Thanks for your help,
Dee


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ledson



Joined: 29 Apr 2009
Posts: 58

PostPosted: Sun Sep 04, 2016 10:12 am    Post subject: fuse holder and starting procedure Reply with quote

Dee,
You maybe able to source the fuse holder you need from Doug Hempstead at Allegro USA. That's my source for replacement parts.

The starting procedures are somewhat different for a Rotax engine verses a Lycoming or Continental. I start mine when it's cold by turning on the aux fuel pump until I have fuel pressure and then turn off the aux fuel pump, engage the choke fully, throttle to full idle, both ignitions on, and start. Once it's running smoothly, I disengage the choke slowly and throttle to 2200 RPM for warm up.

In subsequent starts after the engine is warm I don't have to use the choke.

I wish you luck. Let us know how you do.

Larry

Sent from my iPad

Quote:
On Sep 4, 2016, at 1:02 PM, Dee One <leblancds(at)cox.net> wrote:



I am looking to replace a missing fuse holder like the one shown in the photo. Would you happen to know where I can find one of these unique screw-in fuse holder?

Secondly, I'm new to Allegro. I'm having starting issues. When I pulled the prop through to check the oil and then try to start the engine with the auxiliary fuel pump on, I believe the engine may be flooded. Conversely, if I try to start the engine with one half inch joke, auxiliary fuel pump off, and throttle off, I think it may not be getting enough fuel. I have run down two batteries so far. What is your recommendation for starting on a warm sunny day, roughly 80 F to 90 F ? (hope the photo is viewable. There is no "posted attachments" to click on per the instructions)

Thanks for your help,
Dee

--------
The Past is History
The Future is a Mystery
Today is a Gift
That’s Why They Call it the Present




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=460246#460246












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brad(at)vision-technology
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PostPosted: Sun Sep 04, 2016 11:11 am    Post subject: fuse holder and starting procedure Reply with quote

Does the engine even attempt to start?
If it isn't firing, don't forget to check the obvious... ignition switches on, fuel valve on. Also check that your fuel shutoff knob isn't loose. The knob is basically a metal rod that runs from the panel to the valve on the firewall. Mine once came loose with the fuel valve in the partially closed position. (which was exciting when the engine started running rough shortly after take off, even though it was getting enough fuel for a 4,000 RPM runup).
Brad Kramer
Allegro N221FA
Mandan, ND

[quote]--


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N456TS



Joined: 15 Aug 2015
Posts: 58

PostPosted: Mon Sep 05, 2016 7:31 pm    Post subject: Re: fuse holder and starting procedure Reply with quote

A Rotax should start cleanly and quickly hot or cold. In hot or cold weather. It's not at all like the aviation engines of old. I've uploaded a video clip I happen to have when I started my Allegro. It was a cold engine and 83F weather. You can see the video at: https://youtu.be/mOH_8cDqA30

If your engine isn't starting like this, you have problems.
1. Turn on your electric fuel pump. It can stay on at all times. Rotax now specifically states you should always have it on. To be clear, having the pump on can't force extra fuel into the carburetors (unless there is a carb issue such as a leaking needle valve, heavy or mis-adjusted floats).
2. Throttle at idle.
3. Fuel enricher (choke) on.
4. Start engine. Once engine starts, apply small throttle and turn enricher off.
Allow engine to warm up. Below 2,500 RPM until warm.
Idle should be 1,800 RPM.

The carbs on these engines shouldn't really be tweaked and adjusted. You set them up correctly and they work. If you're changing adjustments all around, something is way out of wack. I would find a Rotax mechanic to find and correct your engine issues. Not a regulator A&P or anyone else who doesn't know Rotax 912's.
You can find people at: http://www.rotaxirmt.com
It's possible, it's not carb related. It could be weak spark, but further investigation requires hands on access.


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Dee One



Joined: 29 Jun 2015
Posts: 47

PostPosted: Tue Sep 06, 2016 11:15 am    Post subject: fuse holder and starting procedure Reply with quote

N456TS,
Thanks for the information. All the work to re-commission this engine was in fact done by a Rotax-certified mechanic. The starting issue is not and every- flight issue. I now I have 13 hours flying time on this plane and have only had a starting issue twice. The first time I had a starting issue, it was using the procedure that you described below, with the exception that I burped the engine first. My mechanic(rotax certified) seems to think I was flooding the carbs; however, I understand that this should not happen per your input below. Not sure what's going on yet.The rough running engine issue ( i.e. between 2200 RPM and 2800 RPM) is in fact an every- flight issue. Still working on this. Thanks for your input.
Dee LeBlanc
leblancds(at)cox.net (leblancds(at)cox.net)
cell 225-802-1038
~~~~~~~~~~~~~~~~
The Past is History
The Future is a Mystery
Today is a Gift
Thats Why They Call it the Present

Quote:
On Sep 5, 2016, at 10:31 PM, N456TS <bottleworksnet(at)gmail.com (bottleworksnet(at)gmail.com)> wrote:
--> Allegro-List message posted by: "N456TS" <bottleworksnet(at)gmail.com (bottleworksnet(at)gmail.com)>A Rotax should start cleanly and quickly hot or cold. In hot or cold weather. It's not at all like the aviation engines of old. I've uploaded a video clip I happen to have when I started my Allegro. It was a cold engine and 83F weather. You can see the video at: https://youtu.be/mOH_8cDqA30If your engine isn't starting like this, you have problems. 1. Turn on your electric fuel pump. It can stay on at all times. Rotax now specifically states you should always have it on. To be clear, having the pump on can't force extra fuel into the carburetors (unless there is a carb issue such as a leaking needle valve, heavy or mis-adjusted floats). 2. Throttle at idle.3. Fuel enricher (choke) on.4. Start engine. Once engine starts, apply small throttle and turn enricher off.Allow engine to warm up. Below 2,500 RPM until warm. Idle should be 1,800 RPM. The carbs on these engines shouldn't really be tweaked and adjusted. You set them up correctly and they work. If you're changing adjustments all around, something is way out of wack. I would find a Rotax mechanic to find and correct your engine issues. Not a regulator A&P or anyone else who doesn't know Rotax 912's. You can find people at: http://www.rotaxirmt.comIt's possible, it's not carb related. It could be weak spark, but further investigation requires hands on access.--------N456TSRead this topic online here:http://forums.matronics.com/viewtopic.php?p=460289#460289


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N456TS



Joined: 15 Aug 2015
Posts: 58

PostPosted: Tue Sep 06, 2016 2:02 pm    Post subject: Re: fuse holder and starting procedure Reply with quote

It might be best to find another mechanic to look at it. Not necessarily specific to your situation, but - not all mechanics are good mechanics.

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