My YS 91 has air bubbles in the fuel line that goes from the pump to the carb. They appear at idle but disappear as I increase the throttle. Is this a problem? I'm new to YS motors. I'm also having a little trouble with a reliable idle, sometimes it's fine, sometimes it slows and dies. Low speed idle screw may not be set just right. I bought the motor barely used, good compression. I'm not using fuel dots, instead I'm using 2 easy fuelers.

Thank you for the help,
Lonnie

Lonnie, do yourself a favor and switch over to fuel dots. Also read the instruction sheet. I you don't have it you can download it off the YS Performance site. The bubbles you see in the fuel line are normal, thats why they sent out dark blue line for the regulator to carb connection.

Once you get it running right I think you will love it.

Ed M.

Thanks bentgear, I bought fuel dots and tee's with built in filers but since the plane had 1 easy fueler from another motor I thought I'd try it like this. I'll swap them out.

Thanks again,
Lonnie