I had mine rust through as well recently. The only casualty I have ever had in the water with this boat turned out to be a hole in the bottom of fuel/water seperator down in the bilge. It had rusted through within a season. I used the one I believe made by Suzuki supplied from the dealer at regular maintenance.
The boat wouldn't turn over, and couldn't pump up pressure with the bulb. Light fuel smell in the bilge. Knew it was obviously a fuel problem, but intially thought a crack in the line, or the bulb itself. Ended up finding a well hidden hole rusted in the bottom of the fuel/water seperator closest to the floor of the bilge. Must of gotten corroded from exposure to sea water at some point in time.
Nobody stopped to volunteer for the tow in after frantic waving of bright orange life jackets, out of phone range to call sea-tow. After dragging in my share of folks, when you're the one in trouble nobody returns the favor. Drifting in the middle of a ship channel with the sun setting in the west, Ended up swimming the boat in to the shoreline, and dragging it all the way back to the dock through knee-thigh deep nasty sinking black sticky smelly mud, breaking a sandal strap, losing the shoe, etc etc.
Moral of the story, CHECK YOUR FUEL/WATER SEPERATOR, Carry a Spare Onboard!! Invest in a VHF Radio when pocket book allows.