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Old 10-10-2006 | 08:36 PM
  #262  
Al Lewis
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From: Port Orchard WA
Default RE: O.S 1.60FX Owners. Post your tach readings
I've never ran a pump and have no need to on this engine in this plane. The muffler thing has nothing to do with a pump. To run right the engine has to have enough back-pressure so you cannot have muffler openings larger then the stock muffler. I run an APC 18x6W on my CAP and it spins up just fine.
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