I have a power arc 4000,it has a briggs and stratton engine,i ordered an original replacement fuel pump,replaced it,but the generator wont run on its on now. what am i doing wrong? thanks for the help!!

Good for you. What's the question?

your filter inside tank may be clogged take aome air and blow in the out let of gas to see if it maybe dirty. check the fuel line itself maybe weak inside and collaisping and not allowing fuel.

blow air back threw the line towards the tank you have something clogging it or you forgot to turn the fuel on

Sounds like your carb needs rebuilt .This condition is caused by blockage of ports and jets in the carb .Running a fuel stabilizer will help prevent this .

No, it has a vacuum fuel pump. The fuel pump looks like this. Also replace the fuel filter.

Ensure choke is turned on while starting.
Ensure spark lead is fully pushed onto plug.
Remove spark plug and check there is a spark by keeping spark plug against body of engine and cranking engine, if no spark check there are no broken wires in ignition circuit.
Turn off gas tap if present. Remove the float bowl while holding a container under it to collect any gas. Turn on tap and check the fuel flows freely.
Check the air filter is clean. If it has foam elements these can be washed with warm water and detergent, rinsed and then oiled with a teaspoon of oil evenly distributed through the foam.

That's interesting that you bypassed the fuel pump after noticing that the carburetor was below the tank, not needing a fuel pump to start the engine.

Maybe they put a fuel pump in to ensure that the float bowl valve is not the only thing preventing gas from overflowing into the carburetor when stored for a long period of time.

I would put the pump in if that's the way they originally designed the fuel supply for the engine, just to be safe.

Good luck on this repair.

You may not be able to find the owners manual, but if you search using model / type #s off the engine, you may be able to find the manual for the engine from the manufacturer.

If gravity feed works to the fuel line on the carburetor, then the fuel pump is bad. Repair or replace fuel pump. I am looking for fuel resistant sealant to repair fuel pump diaphragms. Has anyone tried Permatex 85420 or something else to achieve this? My application is antique and the part is no longer available at a reasonable cost.

an easy way to know that is to start engine and give it a shot of starting fluid ,if you can keep it running by this method I would replace diaphragm.