If you own a boat that hasn't been used for some time, please check the fuel filler hose while fueling up. the hose can rot, causing gas to leak into the bilge, and the vapors are likely to ignite. If there's a strong odor of gas, check the bilge for fuel leakage before trying to start it up, and always let the engine compartment vent thoroughly before starting.
Last night my boss was on an older boat(late 80's), that exploded when they tried to start it up. He and the boat owner, got 3rd degree burns over most of their bodies. Please pray for their health.