RedactedNarrative: Heavy winds had created problems for scouts boating off of Camp Hunt on the west side of Bear Lake. I had spent 30 minutes or so helping scouts/boats back to shore. I was about to leave the area when I realized I still had an oar belonging to the camp on my boat. I started heading towards one of the camp motor boats to return the oar. As I got closer I realized that the operator of the boat was waving me towards her. Once I got close to the boat I could hear her saying that she could not get the boat to turn off, even though she had turned the key to the off position and removed the key from the ignition switch. 
  
  I could see smoke coming from under the motor cover of the boat (1977 Hydroswift). I instructed Operator to get her fire extinguisher while I got one from my patrol vessel. I then went onboard the Hydroswift. The boat was in generally poor condition and I had difficulty opening the boat cover. Once it was open I could see flames lapping around the carburetor but was able to extinguish the flames using both my fire extinguisher and the one provided by Operator. 
  
  I then notified dispatch of the vessel fire and requested to have fire personnel respond in order to insure that the fire was completely out. I also asked Ranger to respond to my location. I had Operator come onboard my boat and then began towing the boat towards the marina. I told dispatch that I would stage outside the marina until fire personnel could check out the boat. 
  
  I was met by the fire boat outside the marina. The boat was inspected and fire responders ascertained that the fire was out. I then towed the boat to the south courtesy dock of the marina. I took several pictures of the boat and it was then inspected by Ranger. He stated that it appeared that the carburetor cover was not completely sealed. Operator had reported that the boat had been backfiring. Operator indicated that over the course of the previous few weeks a considerable amount of work had been done on the engine of the boat. Ranger indicated that, based on his experience and training, the cause of the fire and been a combination of possibly improper wiring and a poor seal around the carburetor. I have asked Ranger to attach a supplement to this report describing his observations and conclusions. 
  
  The boat is almost 40 years old and, as stated earlier, was in generally poor condition Ranger estimated the possible value of the boat at $1000 or less and felt the boat was a total loss.