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Old 09-27-2014 | 09:27 AM
  #12  
JPMacG
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From: Ivyland, PA
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The OP is saying that his engine will spin with an old Evolution plug but not with an OS plug. Only causes I can think of are:

-The Evolution plug has lost its seal and there is no compression with the Evolution plug.

-The OS plug is too long and is interfering with with the piston. I don't think the various 2-stroke OS plugs would do this buy maybe an OS-F plug might?
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