So I was trying to bale some hay today and my Oliver S88 kept running poorly. Gas flow was slow. I drained the tank and looked in side and found it had what looked like a couple of dead moths and some other suck stuff. Pull the sediment bowl assembly off and found it did not have a stand pipe so it was taking in gas from the very bottom of the tank. I know there was no way I was going to get that stuff out and still bale hay today. So I looked in my carb parts fridge and found a piece of fuel pipe that would almost fit into the top of the sediment bowl assembly. I cut a piece of it about 3/4 of an inch long polished it up on the wire wheel and then tapped it into the sediment bowl assembly put it back on put 4 gal of gas in and that fixed the problem. So maybe this will help some one else down the line