Yeah pe, I have filters on all my planes and my pump, but the gasoline test setup got shortchanged because I was in too big a hurry to go get a filter for it. I should have pulled one off a plane but we all know how shoulda's wind up. I cut a corner and got caught. I am in the process of switching everything over to the 51 and hope to run it tomorrow on gasoline. You can bet I went and bought a filter for the test rig today. Not going to have that problem again.