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OS 91 Surpass II quits when igniter is removed

Old 06-25-2016, 11:00 AM
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LJR
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Default OS 91 Surpass II quits when igniter is removed

Engine is low time , never had any problems. Tried 2 more F plugs from known good running engines and still have same problem. All plugs look fine. Any recomendations most appreciated.
Old 06-27-2016, 07:30 AM
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Bax
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Usually, quitting when the ignitor battery is removed indicates a bad glow plug. However, it can also mean that the engine is not set correctly. What you want to do is leave the ignitor on the glow plug and advance the throttle to full. Then get the engine adjusted properly for full-throttle running. Then you should be able to remove the ignitor from the plug. The engine should not quit. You can then slowly retard the throttle and work on getting the idle RPM and mixture found and set.

If the engine quits as soon as the ignitor is removed once the engine's been properly set at high throttle, we'd still think it's a plug problem.
Old 06-27-2016, 08:10 AM
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LJR
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Thank you very much. I am posting this follow up so other guys don't make the same mistake. My engine is all cowled up with a remote glow plug lighter and quick fill fuel filler. GP TIGER MOTH.
I only fly it at my clubs BIG BIRD event.
All your suggestions were right on, and in the right sequence. It took me 2 days to accidentally get to what you said . Which was only 15 minutes of work . At most , when done in the right sequence.
Thing I was doing wrong.
1)Starting the engine at very low idle and quickly removing igniter. Trying to set mixture at that time.
2) Not going to full throttle to heat the glow plug coils on their own and set high speed.
3) A glow plug may look good in your hand , but not so great when installed in the engine.

THANKS FOR TEACHING ME THE RIGHT WAY AGAIN.
Old 06-30-2016, 06:27 AM
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We're glad we could help.

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