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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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 Posted: Fri Jun 05, 2015 6:58 am Post subject: 503 DCDI cutting out. |
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I have a Firestar II with a Rotax 503 DCDI and it's been cutting out. I replaced all the fuel lines, filter, and fuel pump. When I turn on the electric pump the problem goes away. Help!!!!
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Kirk Smith
Columbiaville, MI
Firestar II |
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byoungplumbing(at)gmail.c
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| Posted: Fri Jun 05, 2015 7:56 am Post subject: 503 DCDI cutting out. |
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My first guess would be to see what pressure the pump is putting out,  followed by knowing what pressure it goes to when you add the electric pump. Â
Next I would check the fuel passageway on the inlet to the carb, paying special attention to the small opening above the float needle valve.
From there I would have to rethink..
When using only the pulse pump does adding the enrichener  help?
Boyd
On Jun 5, 2015 9:03 AM, "Kirkds" <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)> wrote:[quote]--> Kolb-List message posted by: "Kirkds" <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)>
I have a Firestar II with a Rotax 503 DCDI and it's been cutting out. I replaced all the fuel lines, filter, and fuel pump. When I turn on the electric pump the problem goes away. Help!!!!
--------
Kirk Smith
Columbiaville, MI
Firestar II
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=443078#443078
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Fri Jun 05, 2015 8:10 am Post subject: 503 DCDI cutting out. |
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Haven’t tried the enrichener. Will have to find a pressure gauge. What’s odd is I’ve taken off 3 times on just the pulse pump with lots of power, climb to 300 feet to level off and then is when it starts cutting out so I flip the electric on, land, and go back to the drawing board. I think I’ll just pull the carbs and clean them.
From: B Young (byoungplumbing(at)gmail.com)
Sent: Friday, June 5, 2015 11:55 AM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: 503 DCDI cutting out.
My first guess would be to see what pressure the pump is putting out, followed by knowing what pressure it goes to when you add the electric pump.
Next I would check the fuel passageway on the inlet to the carb, paying special attention to the small opening above the float needle valve.
From there I would have to rethink..
When using only the pulse pump does adding the enrichener help?
Boyd
On Jun 5, 2015 9:03 AM, "Kirkds" <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)> wrote: | Quote: | --> Kolb-List message posted by: "Kirkds" <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)>
I have a Firestar II with a Rotax 503 DCDI and it's been cutting out. I replaced all the fuel lines, filter, and fuel pump. When I turn on the electric pump the problem goes away. Help!!!!
--------
Kirk Smith
Columbiaville, MI
Firestar II
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=443078#443078
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Kirk Smith
Columbiaville, MI
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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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| Posted: Fri Jun 05, 2015 8:13 am Post subject: 503 DCDI cutting out. |
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I have ran a 447- 2-503's, and an HKS on a Firestar. With my fuel line routing the pulse pump has never been enough to run the engine on full throttle. Leave the electric on, it won't hurt anything. Your pulse is not capable or intended to lift that high. I think? that the fuel source is supposed to be within 18 inches of the pump.. Only 700 hours on my Facett so far.LarryÂ
On Fri, Jun 5, 2015 at 8:58 AM, Kirkds <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)> wrote:
| Quote: | --> Kolb-List message posted by: "Kirkds" <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)>
I have a Firestar II with a Rotax 503 DCDI and it's been cutting out. I replaced all the fuel lines, filter, and fuel pump. When I turn on the electric pump the problem goes away. Help!!!!
--------
Kirk Smith
Columbiaville, MI
Firestar II
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=443078#443078
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rowedenny
Joined: 09 Mar 2008
Posts: 338
Location: Western PA
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| Posted: Fri Jun 05, 2015 8:39 am Post subject: 503 DCDI cutting out. |
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Make sure your tank vents are clear
Do not archive
Dennis "Skid" RoweMk3, Rotax 670,
Leechburg, PA
On Jun 5, 2015, at 12:12 PM, Larry Cottrell <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote:
[quote]I have ran a 447- 2-503's, and an HKS on a Firestar. With my fuel line routing the pulse pump has never been enough to run the engine on full throttle. Leave the electric on, it won't hurt anything. Your pulse is not capable or intended to lift that high. I think? that the fuel source is supposed to be within 18 inches of the pump.. Only 700 hours on my Facett so far.Larry
On Fri, Jun 5, 2015 at 8:58 AM, Kirkds <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)> wrote:
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Fri Jun 05, 2015 9:52 am Post subject: 503 DCDI cutting out. |
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Yep...they’re OK. Thx!
From: Dennis Rowe (rowedenny(at)windstream.net)
Sent: Friday, June 5, 2015 12:37 PM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: 503 DCDI cutting out.
Make sure your tank vents are clear
Do not archive
Dennis "Skid" Rowe Mk3, Rotax 670,
Leechburg, PA
On Jun 5, 2015, at 12:12 PM, Larry Cottrell <lcottrell1020(at)gmail.com (lcottrell1020(at)gmail.com)> wrote:
| Quote: | I have ran a 447- 2-503's, and an HKS on a Firestar. With my fuel line routing the pulse pump has never been enough to run the engine on full throttle. Leave the electric on, it won't hurt anything. Your pulse is not capable or intended to lift that high. I think? that the fuel source is supposed to be within 18 inches of the pump.. Only 700 hours on my Facett so far. Larry
On Fri, Jun 5, 2015 at 8:58 AM, Kirkds <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)> wrote:
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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4800 / Virus Database: 4311/9950 - Release Date: 06/05/15
No virus found in this message.
Checked by AVG - www.avg.com
p> [quote][b]
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Kirk Smith
Columbiaville, MI
Firestar II |
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Fri Jun 05, 2015 9:53 am Post subject: 503 DCDI cutting out. |
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Up until recently it has ran fine on the pulse pump but started cutting out so I replaced all the lines, the filter, and pump thinking the pump was going bad. Got to quit testing for a while as the weather is deteriorating now. Thx!
From: Larry Cottrell (lcottrell1020(at)gmail.com)
Sent: Friday, June 5, 2015 12:12 PM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: 503 DCDI cutting out.
I have ran a 447- 2-503's, and an HKS on a Firestar. With my fuel line routing the pulse pump has never been enough to run the engine on full throttle. Leave the electric on, it won't hurt anything. Your pulse is not capable or intended to lift that high. I think? that the fuel source is supposed to be within 18 inches of the pump.. Only 700 hours on my Facett so far. Larry
On Fri, Jun 5, 2015 at 8:58 AM, Kirkds <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)> wrote:
| Quote: | --> Kolb-List message posted by: "Kirkds" <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)>
I have a Firestar II with a Rotax 503 DCDI and it's been cutting out. I replaced all the fuel lines, filter, and fuel pump. When I turn on the electric pump the problem goes away. Help!!!!
--------
Kirk Smith
Columbiaville, MI
Firestar II
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=443078#443078
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If you forward this email, or any part of it, please remove my email address before sending.
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4800 / Virus Database: 4311/9950 - Release Date: 06/05/15
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Checked by AVG - www.avg.com
p> [quote][b]
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Kirk Smith
Columbiaville, MI
Firestar II |
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Herbgh(at)nctc.com
Guest
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| Posted: Fri Jun 05, 2015 10:01 am Post subject: 503 DCDI cutting out. |
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check the vent on the tank...
On 06/05/2015 11:08 AM, Kirk Smith wrote:
[quote] Haven’t tried the enrichener. Will have to find a pressure gauge. What’s odd is I’ve taken off 3 times on just the pulse pump with lots of power, climb to 300 feet to level off and then is when it starts cutting out so I flip the electric on, land, and go back to the drawing board. I think I’ll just pull the carbs and clean them.Â
Â
From: B Young (byoungplumbing(at)gmail.com)
Sent: Friday, June 5, 2015 11:55 AM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: 503 DCDI cutting out.
Â
My first guess would be to see what pressure the pump is putting out,  followed by knowing what pressure it goes to when you add the electric pump. Â
Next I would check the fuel passageway on the inlet to the carb, paying special attention to the small opening above the float needle valve.
From there I would have to rethink..
When using only the pulse pump does adding the enrichener  help?
Boyd
On Jun 5, 2015 9:03 AM, "Kirkds" <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)> wrote:
No virus found in this message.
Checked by AVG - www.avg.com
Date: 06/05/15
No virus found in this message.
Checked by AVG - www.avg.com
p> [b]
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Herbgh(at)nctc.com
Guest
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| Posted: Fri Jun 05, 2015 10:04 am Post subject: 503 DCDI cutting out. |
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Reading down the list...everyone thought of the tank vents  Â HerbÂ
 could be a problem with carb bowl vents also..
On 06/05/2015 12:48 PM, Kirk Smith wrote:
[quote] Up until recently it has ran fine on the pulse pump but started cutting out so I replaced all the lines, the filter, and pump thinking the pump was going bad. Got to quit testing for a while as the weather is deteriorating now. Thx!
Â
From: Larry Cottrell (lcottrell1020(at)gmail.com)
Sent: Friday, June 5, 2015 12:12 PM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: 503 DCDI cutting out.
Â
I have ran a 447- 2-503's, and an HKS on a Firestar. With my fuel line routing the pulse pump has never been enough to run the engine on full throttle. Leave the electric on, it won't hurt anything. Your pulse is not capable or intended to lift that high. I think? that the fuel source is supposed to be within 18 inches of the pump.. Only 700 hours on my Facett so far. Larry
Â
On Fri, Jun 5, 2015 at 8:58 AM, Kirkds <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)> wrote:
Â
--
If you forward this email, or any part of it, please remove my email address before sending.
No virus found in this message.
Checked by AVG - www.avg.com
Date: 06/05/15
No virus found in this message.
Checked by AVG - www.avg.com
p> [b]
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George Alexander
Joined: 10 Jan 2006
Posts: 245
Location: SW Florida
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| Posted: Fri Jun 05, 2015 10:48 am Post subject: Re: 503 DCDI cutting out. |
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| Kirkds wrote: | | I have a Firestar II with a Rotax 503 DCDI and it's been cutting out. I replaced all the fuel lines, filter, and fuel pump. When I turn on the electric pump the problem goes away. Help!!!! |
You indicated that you had replaced the pump. Are you sure the replacement was a good one? I would consider rebuilding the original pump. Easy, simple and cheap.
If turning the electric on eliminates the problem, I wouldn't suspect venting.
You could tie it down and run it like you would on take off. If and when it cuts out, shut it down without turning the electric pump on and drop the bowls. Bowls dry? Both or one? May be a clue there.
Worth what you paid for it..... your results may vary....
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George Alexander
FS II R503
E-LSA N709FS
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Fri Jun 05, 2015 11:07 am Post subject: 503 DCDI cutting out. |
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I can do that ( tie it down). Thx! I'm thinking the pump I replaced is a
good one as it does the same thing on the new one which is why I replaced
the old one. Maybe they are both bad .....:>(
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Kirk Smith
Columbiaville, MI
Firestar II |
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Fri Jun 05, 2015 11:07 am Post subject: 503 DCDI cutting out. |
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I’m going to pull the electric fuel pump and maybe back flush it . There could be some restriction there as it’s in series with the pulse pump. The manual says it should be in parallel though it’s been working a long time in series with no problems. I’m thinking I should just lower the pulse pump too.
From: Herb (Herbgh(at)nctc.com)
Sent: Friday, June 5, 2015 2:03 PM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: 503 DCDI cutting out.
Reading down the list...everyone thought of the tank vents Herb
could be a problem with carb bowl vents also..
On 06/05/2015 12:48 PM, Kirk Smith wrote:
| Quote: | Up until recently it has ran fine on the pulse pump but started cutting out so I replaced all the lines, the filter, and pump thinking the pump was going bad. Got to quit testing for a while as the weather is deteriorating now. Thx!
From: Larry Cottrell (lcottrell1020(at)gmail.com)
Sent: Friday, June 5, 2015 12:12 PM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: 503 DCDI cutting out.
I have ran a 447- 2-503's, and an HKS on a Firestar. With my fuel line routing the pulse pump has never been enough to run the engine on full throttle. Leave the electric on, it won't hurt anything. Your pulse is not capable or intended to lift that high. I think? that the fuel source is supposed to be within 18 inches of the pump.. Only 700 hours on my Facett so far. Larry
On Fri, Jun 5, 2015 at 8:58 AM, Kirkds <kirk.smith(at)frontier.com (kirk.smith(at)frontier.com)> wrote:
--
If you forward this email, or any part of it, please remove my email address before sending.
No virus found in this message.
Checked by AVG - www.avg.com
Date: 06/05/15
No virus found in this message.
Checked by AVG - www.avg.com
p>
p://www.matronics.com/Navigator?Kolb-List
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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4800 / Virus Database: 4311/9950 - Release Date: 06/05/15
No virus found in this message.
Checked by AVG - www.avg.com
p> [quote][b]
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Kirk Smith
Columbiaville, MI
Firestar II |
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Fri Jun 05, 2015 12:43 pm Post subject: 503 DCDI cutting out. |
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OK, I tied her up filled the carbs with the electric pump, shut the electric
off, and run it wide open. It started sputtering in a minute or so and I
shut her down. Both bowls near empty. For whatever reason the pulse pump
isn't working right. It will maintain an idle or a bit more on the pulse
pump. I did fill the fuel tanks full up to see if maybe raising the fuel
level closer to the pump would help. Still no good. Disconnected the fuel
lines at the tank and at the filter and blew the fuel out of them backwards
into a clear glass jar. Clean as a whistle. Looks like neither one of the
pulse pumps are worth a crap.
--
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Kirk Smith
Columbiaville, MI
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Richard Pike
Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee
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| Posted: Fri Jun 05, 2015 1:03 pm Post subject: Re: 503 DCDI cutting out. |
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Don't know if your tank outlet into the fuel system is a grommet at the bottom that drains out, or a pickup that hangs down from the top, but either way, if you have a bug/grass strainer as part of that pickup/outlet, check that.
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Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Fri Jun 05, 2015 1:38 pm Post subject: 503 DCDI cutting out. |
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2 tubes that hang down into 2 tanks. Had them apart and checked them out
too. Thx!
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Kirk Smith
Columbiaville, MI
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Ducati SS
Joined: 15 Oct 2009
Posts: 93
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| Posted: Fri Jun 05, 2015 2:25 pm Post subject: Re: 503 DCDI cutting out. |
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Did you replace the pulse line? If so how long is the replacement and what hose did you use? The pulse line needs to be as short as possible and of a stiff thick wall material. A long and or flexible ( such as regular fuel line) pulse line will absorb the pulse energy and the pump will not work properly.
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olendorf
Joined: 06 Jul 2006
Posts: 140
Location: Schenectady, NY USA
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| Posted: Sat Jun 06, 2015 5:49 am Post subject: Re: 503 DCDI cutting out. |
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Maybe something inside the electric pump is defective. You can remove the electric pump entirely just for the test runs and see if that is causing the flow restriction.
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Scott Olendorf
Original Firestar, Rotax 447, Powerfin prop
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Sat Jun 06, 2015 6:20 am Post subject: 503 DCDI cutting out. |
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I think the problem might be the pulse line. I used regular fuel tubing for
the pulse line and I was reminded it needs to be a heavier tubing than fuel
line. So maybe the pulse line is collapsing at high rpms? Anyway I ordered
some pulse line. Will know in a few days. Thx!
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Kirk Smith
Columbiaville, MI
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Herbgh(at)nctc.com
Guest
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| Posted: Sat Jun 06, 2015 7:14 am Post subject: 503 DCDI cutting out. |
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Piece of fuel line from your local auto supply works fine..Matter of
fact,,,I use it entirely...Herb
On 06/06/2015 09:18 AM, Kirk Smith wrote:
[quote]
I think the problem might be the pulse line. I used regular fuel
tubing for the pulse line and I was reminded it needs to be a heavier
tubing than fuel line. So maybe the pulse line is collapsing at high
rpms? Anyway I ordered some pulse line. Will know in a few days. Thx!
--
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Sat Jun 06, 2015 11:14 am Post subject: Re: 503 DCDI cutting out. |
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OK...I think I got it fixed. Found a video on Utube on cleaning the pump so I took the old pump apart and cleaned it up . Then I took the replacement pump off and put the old one back on. Tied the plane to the tractor and fired it up. Ran it up to 5200rpms for 3 minutes back down and back up a few times. Ran perfectly on the impulse pump. I'll take her up this evening for a flight check but it looks like it's fixed. Thanks to everyone for the help.
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Kirk Smith
Columbiaville, MI
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