Originally Posted by Handclutch
Mine broke early on, around 100hrs or so from memory. Looked like a manufacturing fault. It had been pressed so hard when forming the bend that the thickness on one side had been reduced by roughly half. Perhaps a bad batch? The replacement has a ‘normal’ bend.
I've observed the same on mine. Part #33 on this diagram.
I know my plane was getting uneven throttle at full rpms, the throttle cable on the left carb was jamming against the fuel line hose, not applying full throttle.
Very, very time consuming to get in there to change this part out. Removed the K&N right air filter for easier access to the bits that needed un threading. Miserable in there, if you have large hands.
Temporarily, I've wedged and glued some hot water insulation foam around the engine mount and between the ignition coil. Will address the problem when it's a bit cooler, both temperature wise, and frustration wise, dealing with fixing this right. In my case, I'm sure the cause was the throttle cable on the left carb not going to full throttle, while the right hand side did. It was jamming into the heat proof fuel line.
Rotated the heat proof fuel line away from the throttle linkage, and resecured with zip ties. Now I get full throttle from both carbs.