Try this....to prove its a tank pressure thing.


When filling the tanks....After its full put a little pressure in it with your fuel pump. Connect the check valve however you have the plumbing setup...and just put a few extra cranks like 4-5 in the right engines tank. If its a electric pump just a couple quick bursts.


This will Pre-pressurize that tank and it might help the situation if it truly is a tank pressure issue.

The other option is to start the right engine and run it alone checking the settings. It could be a little rich or a little lean...something tough to see or actually hear when both are running.

from your video the engine sagged out lean. Does that mean it was lean from the lack of pressure or was it just a smidgen lean on the mixture...I suspect you are correct about the pressure build up.

I would not says it rich...a rich setting will slowly build rpm. This one speeds up and then sags out. If it was rich it would just come up slowly building rpm.

So try the pressure deal and I bet you have it solved.

Troy Newman
Team YS