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Solo 2350D won't start



 
 
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  #1  
Old March 21st 20, 11:32 PM posted to rec.aviation.soaring
Charlie M. (UH & 002 owner/pilot)
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Posts: 1,383
Default Solo 2350D won't start

As a long term poster on car forums.....fantastic feedback....thanks (for someone that may ask, no known neurological issues other than flying without an engine....;-))...extra dots may be likened to a pause when actually speaking to someone...

I was thinking either a collapsing fuel line, tank cap that wasn't venting, possibly a bad diaphragm (wasn't sure if float or diaphragm).

Spark plugs....not a typical issue....very low on trouble shooting list. Sounds like fuel, but short duration.

Whenever you find the issue, PLEASE post back on resolution, too many forums someone posts an issue, many possible fixes, usually never feedback on resolution.
Help the next peep that actually searches.....

Thanks.
  #2  
Old March 22nd 20, 12:08 AM posted to rec.aviation.soaring
2G
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Posts: 1,439
Default Solo 2350D won't start

On Saturday, March 21, 2020 at 4:32:59 PM UTC-7, Charlie M. (UH & 002 owner/pilot) wrote:
As a long term poster on car forums.....fantastic feedback....thanks (for someone that may ask, no known neurological issues other than flying without an engine....;-))...extra dots may be likened to a pause when actually speaking to someone...

I was thinking either a collapsing fuel line, tank cap that wasn't venting, possibly a bad diaphragm (wasn't sure if float or diaphragm).

Spark plugs....not a typical issue....very low on trouble shooting list. Sounds like fuel, but short duration.

Whenever you find the issue, PLEASE post back on resolution, too many forums someone posts an issue, many possible fixes, usually never feedback on resolution.
Help the next peep that actually searches.....

Thanks.


One thing often overlooked with diaphragm carbs is the pop-off pressure of the needle valve. Incorrect pop-off pressure might account for this behavior. This pressure can usually be adjusted by either changing the spring or by bending the needle lever.

https://www.google.com/search?sxsrf=...10.f9GczK9WkxE

Tom
  #3  
Old March 22nd 20, 10:39 PM posted to rec.aviation.soaring
BillT
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Posts: 19
Default Solo 2350D won't start

On Sunday, March 22, 2020 at 11:08:36 AM UTC+11, 2G wrote:
On Saturday, March 21, 2020 at 4:32:59 PM UTC-7, Charlie M. (UH & 002 owner/pilot) wrote:
As a long term poster on car forums.....fantastic feedback....thanks (for someone that may ask, no known neurological issues other than flying without an engine....;-))...extra dots may be likened to a pause when actually speaking to someone...

I was thinking either a collapsing fuel line, tank cap that wasn't venting, possibly a bad diaphragm (wasn't sure if float or diaphragm).

Spark plugs....not a typical issue....very low on trouble shooting list.. Sounds like fuel, but short duration.

Whenever you find the issue, PLEASE post back on resolution, too many forums someone posts an issue, many possible fixes, usually never feedback on resolution.
Help the next peep that actually searches.....

Thanks.


One thing often overlooked with diaphragm carbs is the pop-off pressure of the needle valve. Incorrect pop-off pressure might account for this behavior. This pressure can usually be adjusted by either changing the spring or by bending the needle lever.

https://www.google.com/search?sxsrf=...10.f9GczK9WkxE

Tom


I'd never heard of the "pop off" pressure test. The 5 year inspection schedule for the original 2350 requires a pressure test of 0.4 bar (~ 6psi) allowed to decrease by 0.1 bar/min. https://aircraft.solo.global/img/cms...5_Englisch.pdf
Both of the carbys on our 2350D met this requirement indicating the needle & seat are ok. I'll report the outcome of fault finding, but it could be a few weeks. Rgds, Bill
  #4  
Old March 24th 20, 10:55 AM posted to rec.aviation.soaring
Mike N.
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Posts: 140
Default Solo 2350D won't start

I am having a similar problem in my Ventus Ct. Mine will not start at all.

Is there any way to check for spark on the ground?
I pulled the plugs and hand propped while holding the plugs to the side of the engine case and could see no spark.

Is there a A&P familiar with the Solo motors in south east U.S., or better yet Florida?

Thanks for any help.
Mike
  #5  
Old March 24th 20, 07:21 PM
Ventus_a Ventus_a is offline
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First recorded activity by AviationBanter: May 2010
Posts: 202
Default

Quote:
Originally Posted by Mike N. View Post
I am having a similar problem in my Ventus Ct. Mine will not start at all.

Is there any way to check for spark on the ground?
I pulled the plugs and hand propped while holding the plugs to the side of the engine case and could see no spark.

Is there a A&P familiar with the Solo motors in south east U.S., or better yet Florida?

Thanks for any help.
Mike
Hi Mike

Even if you were getting a spark it might not be that helpful in diagnosing the reason for not starting.

An acquaintance with a D2cT was having a similar problem. He was getting spark, testing as you did. He also had the coils bench tested as being ok but it eventually turned out they were breaking down under load so no joy. He is an experienced 2T & 4T mechanic who used to road race back in the day and he was stumped by it

New coils fixed his problem

:-/ Colin

Last edited by Ventus_a : March 24th 20 at 11:53 PM.
  #6  
Old March 24th 20, 02:28 PM posted to rec.aviation.soaring
Dan Marotta
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Posts: 4,601
Default Solo 2350D won't start

Can you do that manual spark test in a hangar?Â* In dim(mer) light you
should be able to see a spark, if there.Â* Or you could have your plugs
tested, or simply replace them.

On 3/24/2020 4:55 AM, Mike N. wrote:
I am having a similar problem in my Ventus Ct. Mine will not start at all.

Is there any way to check for spark on the ground?
I pulled the plugs and hand propped while holding the plugs to the side of the engine case and could see no spark.

Is there a A&P familiar with the Solo motors in south east U.S., or better yet Florida?

Thanks for any help.
Mike


--
Dan, 5J
  #7  
Old March 24th 20, 04:00 PM posted to rec.aviation.soaring
Dave Nadler
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Posts: 1,610
Default Solo 2350D won't start

On Tuesday, March 24, 2020 at 6:55:06 AM UTC-4, Mike N. wrote:
I am having a similar problem in my Ventus Ct. Mine will not start at all.

Is there any way to check for spark on the ground?
I pulled the plugs and hand propped while holding the plugs to the side of the engine case and could see no spark.

Is there a A&P familiar with the Solo motors in south east U.S., or better yet Florida?

Thanks for any help.
Mike


Not expert on this contraption, however:
- coil failures are not uncommon (vibration breaks of lead at coil), and
- IIRC mechanic at Seminole is familiar with Solo sustainers
Hope that helps,
Best Regards, Dave

PS: Sounds like you already did the coil test and saw no spark, right?
  #8  
Old March 24th 20, 09:12 PM posted to rec.aviation.soaring
Dan Marotta
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Posts: 4,601
Default Solo 2350D won't start

Excellent point!

I recall my Harley cutting out on a road trip.Â* I reached down and
touched the coil and got a shock.Â* I replaced the coil and have had
another 100K trouble free miles (with more to go).

On 3/24/2020 10:00 AM, Dave Nadler wrote:
On Tuesday, March 24, 2020 at 6:55:06 AM UTC-4, Mike N. wrote:
I am having a similar problem in my Ventus Ct. Mine will not start at all.

Is there any way to check for spark on the ground?
I pulled the plugs and hand propped while holding the plugs to the side of the engine case and could see no spark.

Is there a A&P familiar with the Solo motors in south east U.S., or better yet Florida?

Thanks for any help.
Mike

Not expert on this contraption, however:
- coil failures are not uncommon (vibration breaks of lead at coil), and
- IIRC mechanic at Seminole is familiar with Solo sustainers
Hope that helps,
Best Regards, Dave

PS: Sounds like you already did the coil test and saw no spark, right?


--
Dan, 5J
  #9  
Old March 25th 20, 01:31 AM posted to rec.aviation.soaring
Mike N.
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Posts: 140
Default Solo 2350D won't start

I'll call Seminole tomorrow and see if they can troubleshoot.

I am also thinking about getting the pump rebuild lots mentioned earlier in the thread.

Thanks
  #10  
Old March 29th 20, 11:49 PM posted to rec.aviation.soaring
BillT
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Posts: 19
Default Solo 2350D won't start

On Wednesday, March 25, 2020 at 12:31:27 PM UTC+11, Mike N. wrote:
I'll call Seminole tomorrow and see if they can troubleshoot.

I am also thinking about getting the pump rebuild lots mentioned earlier in the thread.

Thanks


I spent a couple of hours Saturday checking suggestions from this group & others. Electrical - a friend put a megga on the spark plugs & tells they're ok. Checked ignition module secondary for continuity - both ok, checked the terminal block on the engine bay firewall for loose connections - all good.
Fuel - removed the pulse line from the diaphragm pump & connected a syringe - it pumped ok. Checked carby inlets & exhaust for blockage (mud wasp nests) - all clear. I've ordered Carby diaphragms, gaskets & metering modules from SH so it may be a few weeks before these are installed. Next problem will be getting a launch to test fly - probably no operations due Cov 19. Rgds, Bill
 




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