Operator was trying to sell his 1987 Sea Ray Seville and was out to take it for a test drive. Operator launched his vessel on the west dock and pulled it to the end of the dock so that the bow of the boat was facing east. Operator said he ran his blowers for approximately 5 min and then Operator and 2 other individuals (1 male 1 female) pushed off of the dock and tried to start the vessel. When he started the vessel it backfired and set ablaze. When the vessel set ablaze the 3 individuals jumped from the vessel and swam ashore. 
 The Hauser Lake Fire Department responded and then put out the fire.  While the fire department was attempting to put out the fire, the vessel drifted east towards the swim area. In an attempt to keep the vessel from floating out into the middle of the lake the Hauser Lake Fire Department strategically placed the boat against the east dock near the swim area.  
In the process of putting out the fire there was some damage to the dock. There were a couple 4x4 railing boards that were burned up and there was some minor superficial damage to the surface of the dock.
Hauser