I recently picked up a project saw (Homelite 330) with inoperative bar oiler. I checked all the normal stuff (tank filter/line, pump/diaphragm, pulse & oil hoses clear, etc.) & everything seems fine. I primed hoses and put some light motor oil in the tank but it made no difference. Not a drop comes out of discharge hole at the bar at full throttle runs. I pulled the saw apart to check the intake boot and examined the pulse & oil hoses closely for any leaks or soft spots. The carb boot was torn, which explains an inconsistent idle issue when running. The oil pump looks great -- no cracks or wear in the housing, ports clean & diaphragm looks fine. The engine has great compression and starts/runs fine (other than the inconsistent idle) -- just no bar oiler. Can you think of anything I'm missing in troubleshooting this thing? I've got another parts saw coming from FleaBay & I'll try swapping oil pumps & replace hoses, but I just can't find anything wrong with the ones on there. Also, I think I may have lost a fuel tank check valve when I pulled it apart. I never noticed anything falling out, but there's a small round hole in the tank that rests against a "filter" strip that's glued to the inside of the top case cover. I'm assuming it's to vent the fuel tank. The parts diagram shows a tiny piece labeled as a check valve that appears to be a press-fit in the hole. There is an impression in the "filter" strip that's a little larger than the hole, so I'm thinking the little bugger was in there & popped out when I pulled things apart. I sifted through my vacuum cleaner bag & the only small hard things I could find in the oily sawdust was roly-poly bug carcasses. Has anyone seen one of these check valves up close who can better describe what I'm looking for? I searched the work bench & floor (the chances of finding anything smaller than a Chevy V8 on that floor is slim). Homelite parts shows it as a discontinued item (of course). Any other saws with a similar check valve that I might be able to adopt if I can't come up with the original? Finally, how in the world do I get the "duckbill" out of the oil tank? Looking at the IPL, it appears that it's located behind a small round screen that's pressed in from the outside (just behind the air filter). I can see the screen and can feel the rubber valve by sticking my finger in the tank. Can I get it out without damaging it? Do I need to take it out if it's not clogged or leaking, i.e. isn't it only a vent for the oil tank? I don't think this tank is pressurized since the only hose connected to it is the hose taking oil to the pump. Sorry for the long post, I'm a :newbie: and it's too cold to play outside. I'll try to attach several pictures to help show what I'm talking about. Thanks!