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Old 01-10-2011 | 05:33 PM
  #2  
red head
 
Joined: Feb 2005
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From: Zephyrhills, FL
Default RE: 2 stroke to 4 stroke conversion

I don't know if there are any charts but in the past we always said " take 10 off and it should be good ". If it's a 30 4s then it should work fine in a 20 size plane. ENJOY !!! RED