I have a Coleman PowerMate generator it has a B&S OHV engine.  The engine model is 115432-0081-01 and the code dates it late 1996.  I need a 715139 carburetor rebuild kit that shows as "No longer available" or is about $90 on the parts sites that supposedly have stock.  Alternatively, is there a replacement carburetor for the P/N 715317?

https://www.jackssmallengines.com/jacks-parts-lookup/manufacturer/briggs-stratton/briggs-stratton-engine/100000-19z999-series/115400-to-115499/115432-0081-01/carburetor 
 
Clean these jets super clean #'s 117 and 142.  
That should, (un-less you have a leaking needle and seat), fix your issue...
 
 
.