It could be anything from leaking injectors to a "puddle" in the exhaust
pipe. Bad injectors or even low compresssion. I hope it is not the
latter because that will invilve an overhaul. If you are not familure
with diesels, read a few books before attempting repairs. They are not
complicated, but have a few quirks. Have a look at the link below. It is
a good site to give a lay person "diesel 101"

http://howstuffworks.lycoszone.com/diesel1.htm

Regards,

Capt. Frank




Cheshire wrote:

I have recently purchased an older trawler and after a long trip, I recently
noticed some diesel fuel coming from the exhaust when tied up and idling.
Apparently not all of the fuel is being burned. Could this be dirty air
filters? Also, I was under the impression that unburned diesel fuel was sent
back the the fuel tank. Could there be some obstruction there?

I don't know much of anything about diesel engines, so any help would be
appreciated.

George