Briggs lawn mower carb

I have a Sears mower I have had for several years . It had been getting more difficult to start , as the years went by .

I was given another brand of mower with a Briggs motor . Same carb model number .

These are the ones with the red rubber bulb that is used to prim the carb .

I have had both carbs apart , cleaning gunky fuel out of them . I think the mower given to me had been refueled , once , with 2 cycle oil / gas mixture ?

The priming bulb does not work on either carb . I am wondering if there was a little steel ball in either the carb or the assembly the red rubber bulb is located in ? I replaced the bulb on one of them with out improvement ?

Thanks ,
God bless
Wyr

 

I haven't had all those things apart, but it's been a long time since I've seen a metal check ball. The primer bulbs that circulate fuel through the carb back through the carb back to the tank in an all position carb are just flap checked. The type that literally squirts fuel into the carb throat is normally flap checked, but the older ones may have a ball of some type.

The one you have, I believe pumps air into the float bowl assembly and forces fuel up through a tube into the carb throat. If you could post the carb/engine number we could check some parts diagrams and tell you for sure.

 

If it's the type with the carb mounted to the gas tank, then yes, it has a metal ball check valve system for the primer. If the primer is mounted elsewhere, then it pumps air into the float bowl as marbobj described. Engine info would help us know what we're talking about.

 

Carb is not on the gas tank . It is 10 F outside now . Will be a will , before I get you the model numbers :-(

Honestly , I will probably not work on it until spring , but would like to have all the info I can .

Thanks ,
Wyr
God bless