SailNet Community - View Single Post - Diagnose your diesel engine
View Single Post
  #1  
Old 07-18-2008
RickQuann's Avatar
RickQuann RickQuann is offline
Senior Member
 
Join Date: May 2005
Posts: 512
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
RickQuann is on a distinguished road
Diagnose your diesel engine

Received this in an email and thought that I would share it



Hints from Admiralty Yacht Sales -- Diagnose your diesel engine
While this is not intended to be an exhaustive list of methods to diagnose your diesel engine's general health, there are several non-technical techniques to check the health of your engine. Make sure your engine is warmed up before diagnosis.
Diagnose your diesel engine's running condition by the color of its exhaust:
Black smoke - Indicates unburned fuel/highly loaded condition
  • In situations where the boat has reached hull speed and the engine has enough power to try to make it go faster, black smoke will result. Back off the throttle a few hundred RPM's until the black smoke disappears or reduces to gray smoke.
Black smoke with oil sheen and soot on the water
  • May indicate plugged, worn or dirty injectors. Running the engine hard for 15 minutes or so may clean up the exhaust. If after this "blowing out" period the black smoke continues, injector service may be necessary.
Gray smoke
  • Indicates normal running condition. All diesels produce some level of gray smoke and may leave a sooty film on the transom of the boat. If a great deal of soot is present, see "black smoke".
White smoke
  • Probably indicates steam. Check engine temperature and volume of exhaust water to insure the engine is running at the proper temperature. In cold weather, white smoke is normal when engine is at operating temp.
Reply With Quote Share with Facebook