Walbro vs Briggs logo carb settings

Are there differences in settings for the older Walbro vs the newer Briggs logo carb? I have the Briggs carb set at .900, needle 2nd from top, idle screw set for highest RPM at 2500 or so. We typically have an air density of about 90% (hot and humid). Should the float go higher than this on the Briggs carb to lean out the top end even more?


Active member
I have not heard that the fuel level is adjust according to carb body manufacturers. You have your float at .900" that is a setting which causes the fuel level to be low in the bowl, which is toward the leaner side, if you change the float height to .880 this causes the fuel level to be higher and causes a richer mixture. Are you confusing. Float height setting and fuel level?