Question about Briggs & Stratton Power Products 5,550 Watt Portable Generator #30241

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Spark plug gap for AP3923 in DeVILBIS generator

What is the gap for an Autolite AP3923 spark plug in a Briggs & Stratton 19E412-1131-E1 engine on a DeVILBIS GB5000 portable generator? (I cannot locate my manual since we moved and cannot find it online either.)



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  • yantisr Dec 28, 2008

    Solved. Found the manual at Briggs & Stratton's web site - it is for the 19000-25000 Series engines. (doh!) The gap is 0.030" (0.76 mm).

    But thanks for this site anyway. I will surely be making use of it in the future.


  • yantisr Jan 28, 2009


    As I said in my 2nd post on Dec 28 '08:

    (I) "Solved." (it myself) "Found the manual at Briggs & Stratton's web site - it is for the 19000-25000 Series engines. (doh!) The gap is 0.030" (0.76 mm).

    But thanks for this site anyway. I will surely be making use of it in the future.


    Thanks for the followup though.


  • 54generator
    54generator May 11, 2010

    Send me the engine model number & I'll reply with the plug gap. The model number is 5-6 digits long and located on one of the engine's metal shrouds.



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