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HelicopterGasser Model RC HelicoptersOther › Engine surge
01-24-2007 08:37 AM  10 years agoPost 1
Lance Walford

rrNovice

Nelson New Zealand

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Hi All,
I have just purchase a second hand Spectra G, Engine 231
Mixture screws settings Low and High 1.1/4 turns out, Fuel 91 octane 32.1 cool power.
When throttle is increased to the point of almost lift off the engine rpm starts surging, I have adjusted low mixture up to a 1/4 turn either way and surging dose not change. I have also fitted a new ali insulator to the carbi. I have removed carbi and checked Diaphram etc and all loks good.
Can anyone help me?
Thank you Lance

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01-25-2007 04:14 AM  10 years agoPost 2
Peterr

rrApprentice

Queensland Australia

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Is it smoky ? Spectra's hover on the high needle, try richening it up .. Start with both needles 1.5 turns out .. it's also possible that you've got one of the ZRC insulator seals in wrong .. been there , done that !! Was it doing the surging before you fitted the ZRC insulator ?

E ,N ,G Whiplash's;Spectra G's;Stratus;E&N Razor,Fury 55;Furion6;TSA 600N, 700N, 700G;; Be

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01-25-2007 05:06 AM  10 years agoPost 3
Lance Walford

rrNovice

Nelson New Zealand

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spectra g

Thank you for your reply. Yes it was surging before fitting insulator.
and yes small amount of smoke. Will try richning again.
Lance

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