Originally Posted by HiDHo
I've read that two 2 micron filters are tough on fuel pumps. I use 10/2 ratio.
I'm not a Yanmar guy, but diesel fuel delivery is pretty generic, so I can offer this:
Fuel pumps are generally pretty tough items, and should never see any strain if your filtration system is up to snuff and regularly monitored/maintained.
I would get another racor to mount inline, so that your filtration is 30-10-2, and install a vacuum gauge with a drag indicator between the filters and the pump.