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Old 06-07-2008 | 09:01 AM
  #9  
JohnF
 
Joined: Mar 2003
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From: Conifer, Colorado
Default RE: B&S 40cc, 4-stroke recipe for success

Just a couple more pictures of the Zama on the engine. I like the way it bolts up better than the Walbro did. You can see that the pulse line is horizontal and I am able to keep it much shorter. I will be able to make a better throttle linkage also. This is the 33% Nitro I am using. There is a note on the top of the can that tells you to "richen up the High speed needle 3/4 turn if previously running 20% nitro". Higher nitro requires a richer fuel mixture. This is a 1 qt. can. Last is a picture of the inside of the head. You need to get the glow plug as deep as possible without hitting the piston. I am told this retards or advances the timing (thanks Ben) This is how it looks with the adapter I am using. Ben (planepounder) has been a tremendous help with this project and it's success. Thanks a ton Ben.
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