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Old 12-20-2010 | 07:02 PM
  #15  
wrob
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From: Apple Valley, CA
Default RE: ASP FS61 midrange problems
MY ASP FS .61 has the rich mid-range problem as well. It occurs between 1/4 - 1/2 throttle. It's in a Thunder Tiger Ready MK3...

I'm running PowerMaster 15% nitro w/ 18% oil. I'm sure I have the engine tuned properly. Have tried the Fox Miracle plug...didn't help mid-range. It idles better with the OS F plug which is what I am running. In the review section someone else mentioned this problem.

Looking for a solution myself.
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