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Thread: STS .28 pull-start engine
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Old 07-02-2005 | 09:50 PM
  #180  
8man
Tech Initiate
 
Joined: May 2005
Posts: 26
From: USA
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When tuned for best performance, mine wants to run at 275. If I richen it, it gets all rough at idle-midrange. 275 is with 80' outside temp. Help.

Medium temp plug
0.3 head shims
20% nitro
14% oil
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