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FS II 503 CHT cold?

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slowaero

Joined: 28 Nov 2009
Posts: 17

Posted: Sat Nov 28, 2009 7:34 pm Post subject: FS II 503 CHT cold?

Hello All,



My FSII runs and flies great but CHT seems low.  503 duel carb.  Prop is set so RPM is right on the money.  EGT runs in the recommended range (860 to 1100 degrees F) but CHT hangs between 200 and 300.  330 only after prolonged full power climb.  Plug electrodes are light brown.  CHT gauge checks OK.  



Anyone have any thoughts or suggestions?  



Thanks very much in advance,

SA

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Last edited by slowaero on Mon Nov 30, 2009 12:41 pm; edited 1 time in total

zeprep251(at)AOL.COM
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Posted: Sun Nov 29, 2009 9:49 am Post subject: FS II CHT vs EGT

SA,

 I put 550 hrs on my 503 in a FS2 and the CHT,s rarely hit 300 and like yours only in a long full power climb.1100 egt,s and a very light tan plug color.i think the combination of fan cooling and ram air into the fan must be a factor.

  G.Aman Mk-3C Jabiru 2200A 495hrs

 

   Nature always sides with the hidden flaw

 

   

 

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