Fuel problem, please help.

[HookedOnMarsh]

I'll bite I guess. You mentioned that the primer bulb was going flat. If you're not mashing it and it's going flat on it's own then you just ruled out your engine and fuel system from the bulb to the engine. Period. Has to be.
The problem lies between the other side of the bulb and the fuel in the tank. Maybe something is clogging up the inlet strainer in the tank? Bad primer bulb check valve(happens to me every 2 years). Trash caught in the shutoff valve at the tank, collapsing hose between the bulb and the tank. Or most unlikely, but not forgotten is a clog in the air vent.
Hope this helps.

[THEFERMANATOR]

Is the racor before or after the racor? If it is before I would replace it. I change my spin ons pretty regularly espescially with this ethanol crap we get now. Also what fuel line are you running? Make sure it is a new style marine grade line as most automotive lines are not meant to run under a vacuum like an outboard does. Verify the tank vent is good. I pulled the one out of my pro line even though it looked new and it had a big chunk of corrosion inside it. It still flowed air, but not enough when I dropped the hammer. Also if your tank has a anti-drainback valve in it, pull it out and clean it. Over the years that check ball gets varnished pretty badly and will cause it to obstruct the fuel pick-up. Most people just remove the check ball from them to prevent from having this problem. Start with basics and go from there. Also I like to use marine grade EFI fuel line as it is HEAVY walled and will not collapse even when you are hammering down on it.