T&T: Exhaust

[Robby & Dolores]

Dave Cooper said "Detroit's are not know as the cleanest burning engines but 
again maybe I screwed something up in the design and building of this 
system." and John Tones commented: "Our ex commercial fish boat has a dry 
exhaust / keel cooler system and I would not give it up. It has to be the 
most maintenance free system around for this application and in 15 years we 
have not had a problem
including the cold run soot problem"

We also have an x-fish boat running a Detroit 6-71 & dry exhaust and never, 
in five years, had soot problems either on start-up or running at any speed. 
As an aside we don't have soot problems with our Dickinson  stove either.

It's been my observation it is a design (brand) of the engine, at least on 
start-up which causes this.  We were side-tied to a big, new crab boat in 
Wrangle some years ago (with our sailboat) when he started up.  In fairness 
he did warn us that his engine blew soot when first started -- wished I had 
moved :>).  I would not want a dry exhaust if this might be a problem since 
the resulting mess would be a nightmare to clean up everytime you started. 
In our case, like John Tones, I would 't trade -- Our dry exhaust is simple, 
fool-proof and I hate impellers also.

Robby