Small Engines (Lawn Mowers, etc.): gas bulb, briggs stration, briggs and stratton

Question
Hi, i have briggs & Stration 4 H P mower the gas bulb was bad so i cleaned the seat area and installed a new one but it won't pump gas , thankyou for your time and help, gary

Answer
What is the engine model?

Do you have a pulsa prime carburetor?  Check out this video and let me know if this is the carb you have:

http://www.youtube.com/watch?v=x5ousG_5g0w

Lots of You Tube videos on cleaning and rebuilding Briggs and Stratton pulsa prime carburetors.

Eric