Marine units assigned to Seafair operations received a call of a 60 foot vessel on fire with approx. 20 persons aboard.  Upon arrival. the owner/operator reported that he had a fire in his engine compartment and his Halon fire extinguishing system had deployed.  Owner also stated they also activated two "BC" extinguishers on the fire and had evacuatedtheir vessel onto other vessels in the area.

I finished evacuating the owner onto my vessel and conducted the firefighting opeations aboard the vitctim vessel.  Itowed the vessel to the owners dock where it was further inspected by land based firefighting personnel.

It appeared the fire occurred on the starboard manifold either from overheat or because of a previous malfuntion of the diesel fuel system possibly soaking the packing with diesel fuel.

Owner was checked  out b aid personnel at the scene.