That filter/strainer in the tank is the route I went when mine started losing power , so I dropped the tank after draining it and knew right away after pulling the strainer/filter that that wasn't my problem, that's when I got to tracing fuel lines from the tank to the filter housing with a manual pump and from there up towards the radiator where I found a small in-line filter at the fuel cooler and that was what it was, on mine anyway, it's a 2011 5093E Limited, I'm not saying that yours has that filter but I would sure rule it out before I drained that tank.