While in Bullfrog dispatch notified me that a male individual was on his way to the Bullfrog clinic for the treatment of burns. I responded to the Bullfrog clinic and met up with Operator. I asked him what took place. He explained that his jet ski was vapor locked so he decided to blow it out. He said that he removed the spark plugs and placed them on the houseboat. He then started his jet ski by pressing the start button when a huge flame came up in his face. He could not remember what caused the flame. Operator told me that the jet ski was put out with the fire extinguisher from the houseboat. He was also sprayed down with the fire extinguisher. Looking over Operator I noticed he had burns to his left portion of his face, left shoulder, and left portion of his chest. After gather his information I left a witness statement with him to fill out while I went to his camp in Iceberg canyon to get the information off his jet ski. 

I located his camp and began my investigation. I found the jet ski on shore with the engine cover open. Looking in the engine compartment I found most of the wiring to be melted. The spark plugs were still removed. I found the fill spout for the fuel to be melted. I saw that the wires to the battery were cut. I also saw damage to the rear compartment from the fire. 

At this time I am unsure how the fire started due to the fact every wire was melted. I do believe the fire was caused when the ignition button was pressed; leading me to believe this was the source.
Bullfrog