From: BobEngelhardt@comcast.net   
      
   If there's a better site/forum for this question, please let me know.   
      
   I have an old (mid 80's) Sears Craftsman generator - 4 cycle B&S engine   
   & 120v, 1350W rated output.  (Jeff - model 580.328172)   
      
   I haven't used it in decades so I cleaned it up & checked it out with   
   the intent to donate it to the Habitat ReStore.   
      
   Imagine my surprise when I measured the no-load output voltage at 134v   
   (with Fluke 36 True RMS meter).  That dropped to 117v with a 10A load.   
      
   The no-load frequency is 62Hz, which is what the manual says it should   
   be (3720 RPM).  That drops to 59Hz at 10A load.   
      
   The manual also claims a +-5% voltage regulation.   
      
   Seemingly unrelated, but ... the DC output is only 7v.  Also, there is   
   1500Hz+-, 20v+- PP superimposed on the 120v 60hz output.   
      
   Note that I never before checked the voltage and I've never had a   
   problem with it damaging loads (refrigerator, freezer, ??).  So either   
   it's always been over-voltage & no-matter, or it's changed while sitting   
   idle.   
      
   Any ideas about what's going on here?  And to diagnose & fix?   
      
   Thanks, Bob   
      
      
   The manual spec page:   
   https://imgur.com/phBAUpM   
   The circuit schematic:   
   https://imgur.com/vA6RIsa   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)