Briggs 6.5 not pumping fuel

[CN Spots]

I can pump the bulb a few times and get her to run for a second but it obviously isn't pumping fuel. I have switched carbs from a 6.5 that WAS running with the same results. I suspect the problem might be (y'all forgive my lack of small engine part knowledge) that little rectangle box that covers the valve springs. It looks like it has a reed valve in it or something. It appears to be ok but is it possible it has gone bad and I just can't see it? -or is there something else I've missed entirely? Thanks.<br /><br />My kingdom for a Honda.<br /><br />spots

 

[Pony]

Re: Briggs 6.5 not pumping fuel

My kingdom for a Honda.

Naw........you must just have a Briggs built with parts from the plant in Alabama.<br /><br /><br />Have you checked your fuel lines for air leaks? Its obviously not the carb if the known working one has the same symptoms. Just thinking out loud really.

 

[CN Spots]

Re: Briggs 6.5 not pumping fuel

Naw........you must just have a Briggs built with parts from the plant in Alabama.

"Inspected by Bubba"<br /><br />I replaced all the lines and clamped everything. Including the little elbow tube leading to the "fuel pump".<br />Both carbs were cleaned as well.<br /><br />The fuel tank has a crack in the top of it... could this be causing a lack of pressure that is necessary for the fuel to pump?<br /><br />spots

 

[Pony]

Re: Briggs 6.5 not pumping fuel

If the fuel "pump" is run by vaccum sure.....<br /><br />What bulb are you pumping? I don't know of any Briggs that have primers. I can run all my Briggs with the fuel caps off.......not that I do, but can.<br /><br />Some, but not many Briggs motors have vaccum assist fuel pumps. If yours does then yeah that crack might be the issue. Usually the tank is mounted high though, most B&S are gravity fed.

 

[CN Spots]

Re: Briggs 6.5 not pumping fuel

After checking around I found out that that box has to do with emissions, not fuel flow. I put everything back together and sealed up the cracks in the tank with some fuel resistant adhesive/sealer, gave it a pull and the stupid thing started right up! I dunno if it was the tank or not, just glad that I don't have to buy a new mower! Thanks for the help.<br /><br />spots

 

[DJ]

Re: Briggs 6.5 not pumping fuel

I don't believe there is a pump. It's gravity fed.