It happened around 1:30 p.m. at a marina off W. Savidge Drive near the Savidge bridge in the village of Spring Lake.
The Ottawa County Sheriff’s Office says a boater pulled in to refuel. When he was preparing to leave, he started the engine and there was a small explosion in the engine compartment.
That sparked a fire that bystanders were able to smother with fire extinguishers.
The boater, a Rockford man, and his passengers, which included several children, quickly got off the boat. One of them, a 63-year-old Holland woman, was hospitalized with injuries that are not considered life-threatening.