kevann(at)gotsky.com
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 Posted: Sat May 09, 2009 11:54 am Post subject: AeroElectric-List Digest: 15 Msgs - 05/08/09 |
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Suspect carburation first, ignition is less likely.
With the engine warmed up try pulling the choke on. This will enrichen
the mixture, so if it runs better the carbs are probably set too lean.
Check the small diameter hoses to both carbs for cracks.
How long has it been since the carbs were serviced, the diaphrams,
o-rings and such replaced?
Kevin
On Fri, May 8, 2009 at 11:37 PM , Martin & Chris wrote:
| Quote: |
<aerobiz(at)optusnet.com.au>
Hi guys,
We are getting an engine miss in a Rotax 912-powered a/c. It is fine
until about 20 minutes into the flight, then you can detect the miss.
Strange given that it has dual ignition,. We tried fiddling with the
carb and leaning the mixture off seemed to solve the problem for a few
hours, but it back worse than ever. The ignition parts are quite
expensive so would like to isolate the problem before replacing
everything. So what I am looking at is advice on testing the ignition
coils. How you should go about it and what equipment is needed. If
they check out, then the modules will be next, but one thing at a
time.
Any advice appreciated.
Martin
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