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Old 02-25-2010 | 11:30 AM
  #19  
psuguru
 
Joined: Aug 2007
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From: ChelmsfordEssex, UNITED KINGDOM
Default RE: O.S 91 four stroke starting problems

ORIGINAL: jeffie8696
Yea Ihave tried the extra rich thing , even had fuel blowing out the exhaust to no avail. It just decides to fire when it wants to Ialways get it eventually. Heat gun would probably help.
It sounds to me like the plug is either tired or is not being heated enough.