Toilet fill valve degradation and limescale buildup

“Leaky loo, do I need to replace the fill valve? Weird issue - after I flush, the tank fills normally and stops. But if I leave it overnight, the water level creeps up to the overflow tube. The fill valve isn't running (no sound, no visible flow), but somehow water is slowly getting in there over several hours. I've tried descaling with vinegar and setting the float lower. Also noticed the shutoff valve (screw-head type on the supply line) leaks when I try to close it. Anyone seen this before? Ba”

“Carburetor float leaking gas after replacement I've got a Johnson jw-10 outboard motor that I'm going through a restoration with. I've done everything and it runs great, but eventually floods out as the float doesn't seal. I have two carburetors for it. What I've done so far: Replace float, seat and needle. Flip carb upside down and blow into fuel inlet. It seals and holds suction Go back to the original float, seat, needle, etc in every combo. All of these behave the same Swap everything to the”

“Bad flapper, or is something else causing an internal toilet leak? My toilet was taking too long to fill (90 seconds), so I replaced the Fluidmaster 400 fill valve with a new one, but not the flapper, because there had been no problem with the valve opening intermittently. Afterwards, the new fill valve would open about every 15 minutes. I replaced the flapper with a flapper/seal repair kit including silicone sealant for the new seal, and I applied plumber's grease to the flapper and seal. No ch”