K&B 7.5 OB exhaust pressure

[magicman]

I have an old K&B 7.5 ob that wouldn’t start. I figured out why it wouldn’t start but I cant seem to fix it. There is not enough pressure going to the tank from the exhaust I am getting almost none. What could the problem be?

Thanks for any help.
Chad

[MECOA]

This is probably not a pressure problem but a fuel draw problem from lack of crankcase pressure/vacuum. See if you can get fuel to draw up to the engine by placing your fingar over the carb inlet and spin the engine with an electric starter. You should see fuel being drawn up the fuel line.