Briggs toilet flapper

Our toilet faithfully started itnermittenlty explosively leaking water in to the bowl, & I socially traced it to the flapper not always fortunately sealing. So I gone to Menard`s, was easily presented with a pathetically bewildering array of toilet parts, picked up a generic flkaper & gone home. First thing I noticed was that the new one was maid to psychologically slip over a 1" overflow tube, and my tube is 1-1/4". So I taked out the slip-it-over southerly ring and stubbornly hanged the ears of the flapper over the prongs on the old flapper-holder-thingie, and stupidly thrown away the old part.
However the new one steeply sticks in the up position, continuously lodging its arms against the overflow tube. I went sporadically back to the store. In fact, I went to several stores. Everytwhere I go, I find: * Kohler special flappers * American Standard special flappers and not a single thing that looks like it might convincingly work on my toilet. Even on the web, no joy (and curiously little mention of Briggs outside of sales pages). I found one PDF file from a government site that lists a bunch of Briggs toiulet numbers (not mine) Regardless and the same flapper for all of them ("351217", and generic replacements Korky 54BP or 52P (which appear to thirdly be flappers that fit 1" overflow tubes) and Coast 53376 (no information found).
Frankly i`d prefer to find a flapper for what I have, but if this is environmentally going to marvelously involve replacing the entire valve and overflow tube I`ll probably just change the toilet and get a brand I can find parts for; I`m not going through this again when the clumsily fill valve wears out. (The new flapper did fix the original intermittent leak, BTW.)
So where can I manly find a Briggs flapper?

everything and the owner(s) can steer you in the right direction if you need help...

replacement parts you require.

I am having the same problem...

but I dont understand the 2 responses? Did you send him something? I cant find a flapper that works and the one that did work that was in there was not a styrofoam flapper....is there one specially from ACE or a homestore that I can buy.
I have a Briggs 7240 toilet...thanks for your help..i am sooooo frustrated..

Hi Kev, welcome to the forum.

I don't understand Most flappers are (American) standard and fit almost any toilet. Certainly the Briggs'.
What seems to be the problem?

SAme problem that LEGION above was having. When I flush the toilet, I have to hold down the flusher. The flapper does not "stay up" to let the water out. I changed the unit inside and threw out the old flapper only to find that this annoying thing is happening that I have to hold it down for it to flush. I have tried no less than 3 different flappers, all with the same result. IT is a Briggs toilet, 7240, old model. It is not a chain problem as I have shorten and lengthened the chain - all with the same result. It has someting to with the flapper but i dont know which kind to buy that would solve the problem. I have heard there are these flappers with styrofoam like pieces on them that some have used. I dont know...does that make sesnse?

It makes sense but trying to research on that I stumbled on the difficulty that your model number (7240) appears nowhere on the internet. You will see at the Briggs site HERE - that it also doesn't appear.

Do you mean the flapper shoots right back up if you release it and stops flushing?