RedactedNarrative: I was at the top of the boat ramp when I noticed a vessel approximately 1500 feet north of the main boat ramp.  I notified Wasatch County Dispatch and requested Jordanelle Fire to respond.  I proceeded to go to our patrol vessel With a seasonal park employee and a Coast Guard volunteer.  I was able to get our vessel along SUBJECT'S vessel in approximately ten minutes.  
  
  We handed a fire extinguisher to SUBJECT who used 1/2 of my extinguisher on the smoke producing areas.  No open flames were visible.  SUBJECT had used his own extinguisher and another that a passing boat had given him.  I transferred all 8 passenger's from SUBJECT'S vessel to my patrol vessel.  There were no injuries on any of the passengers. I then did a bow tow into the courtesy docks where Jordanelle fire was waiting.  Jordanelle Fire inspected the engine compartment and determined the fire was extinguished.  I assisted SUBJECT on putting his vessel on his trailer with a side tow.  I performed an Vessel Inspection and gave two written warnings for equipment problems.  I explained the equipment issues and then gave a boating highlight to SUBJECT.
  
  When looking at the engine compartment for a possible cause it was hard to determine due to the amount of flame retardant that was coated in the engine compartment.  There were numerous signs of melting and damage on a variety of different engine parts.  SUBJECT stated that he had just put  the vessel in the water and was leaving the main marina area when they noticed smoke coming from the engine compartment.  He stated that he did look at the engine temperature gauge and noticed that it was hot.  Hard to determine what came first.  Possible blockage of water pump or impaler problem not circulating water through the engine to cool it..
  
  End of Report