Solo 2350D won't start

On Sunday, March 22, 2020 at 3:39:05 PM UTC-7, BillT wrote:
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

This is the carb pop-off pressure test.