Hi Troy
I have two questions about my YS-110

1) Is it must to have filter on the return line to the fuel tank ?
2) Is that ok to run the engine a little bit rich on regular base, i findout that when my niddle is set to 1.75 then after landing the engine is not so hot and there is strong comperssion but if the niddle will be between 1.5 to 1.75 there will be significantly less comperssion after landing.

Thanks
Shlomo