Fixing a cracked ts420 primer bulb on your saw

If you've noticed your ts420 primer bulb is looking a bit dry-rotted or cracked, you're definitely not alone. It's one of those tiny, five-dollar parts that has a weird way of completely ruining a thousand-dollar workday. You go to prime the saw, give it a few pumps, and instead of seeing fuel rush through the line, you just hear a pathetic little hiss of air. Or worse, you get a thumb full of gasoline because the rubber finally gave up the ghost. ...

May 20, 2026 · 7 min · Ampudia Ocallaghan