SailNet Community - View Single Post - Yanmar 1 GM Knocking
View Single Post
post #7 of Old 07-12-2009
Senior Member
Join Date: Jun 2007
Posts: 2,708
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
I hardly know the 1st think about diesel engines, but, in a gasoline engine, "knocking" is often a sign of pre-ignition (the fuel/air mixture igniting in the cylinder before it's supposed to), caused by either too low a fuel octane rating, too lean a fuel/air mixture, or a spark timing problem. (The spark timing problem wouldn't be applicable to a diesel, of course, as its mixture is ignited by pressure, not electrically.)

SEMIJim is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome