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Old 11-06-2007 | 08:36 AM
  #13  
jaka
 
Joined: Dec 2001
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From: Upplands Vasby, SWEDEN
Default RE: Is this normal?

Hi!
The black stuff can come from a lose silencer (aluminium rubbing against alu makes black residue).
Also try a larger prop like a 13x6 APC.