On Sun, 05 Mar 2006 22:59:31 -0500, Larry wrote:

Larry wrote in
:

I could see it would carbon up if you just ran the engines in an
unloaded condition in neutral for long periods of time....

Thinking about this, I cannot help but think about those engines in the
big trucks that are left idling for 8 hours, virtually unloaded, while
the driver is sleeping in his sleeper at the truck stop. I suppose he
burns off all the deposits when he drives off down the interstate in the
morning.

Obviously, 8 hours of idling while sleeping, followed by 8 hours of 80
mph under load, followed by 8 hours of idling, again, isn't hurting
Cummins engines much. Hell, they don't overhaul them in the real world
away from the service manual until the clock says 400,000 to 500,000
miles...or more.

What about my diesel cars that hardly ever leave the city? I've never
seen this phenomenon while sitting in the traffic for hours on end,
idling along to the next traffic light.....??

Maybe it isn't as serious as it's imagined.....?? My 73 220D was
overhauled at 300K after 28 years on the road. Its exhaust always
looked black and oily, especially if you brushed your pants against the
pipe getting the load out of the trunk. I saved a piston and the valves
from the overhaul junk pile. There wasn't any kind of hard coked
deposits anywhere you couldn't wipe off with a shop rag....

Automotive/truck diesels are different, designed to run at light load for
extended periods. Marine/industrial diesels are designed to run at high
load all the time, like a truck pulling a full load over an endless
mountain pass. Of course there's some crossover, but for the most part
these are different types of engines.

Matt O.

"Matt O'Toole" wrote in message
news
On Sun, 05 Mar 2006 22:59:31 -0500, Larry wrote:
Automotive/truck diesels are different, designed to run at light load for
extended periods. Marine/industrial diesels are designed to run at high
load all the time, like a truck pulling a full load over an endless
mountain pass. Of course there's some crossover, but for the most part
these are different types of engines.


I suspect that many here have visited this site; for those who haven't, take
a look at this for one person's opinions on diesel power for boats (and many
other subjects).
http://www.yachtsurvey.com/GasNdiesel.htm

In article ,
Matt O'Toole wrote:

Automotive/truck diesels are different, designed to run at light load for
extended periods. Marine/industrial diesels are designed to run at high
load all the time, like a truck pulling a full load over an endless
mountain pass. Of course there's some crossover, but for the most part
these are different types of engines.

Matt O.

I really don't know where you learned your Diesel Engineering, but
a 3408 CAT is a 3408 CAT, and it really doesn't matter if it is in a
truck, boat, or Genset. The only real difference is in the governer
and not really much difference there, either.....

Me

Me wrote in news:Me-AE1290.10191707032006
@netnews.worldnet.att.net:

I really don't know where you learned your Diesel Engineering, but
a 3408 CAT is a 3408 CAT, and it really doesn't matter if it is in a
truck, boat, or Genset. The only real difference is in the governer
and not really much difference there, either.....

Me


I thought if you connected it to a marine transmission the price
doubled....(c;

Matt O'Toole wrote in
news
Automotive/truck diesels are different, designed to run at light load for
extended periods. Marine/industrial diesels are designed to run at high
load all the time, like a truck pulling a full load over an endless
mountain pass. Of course there's some crossover, but for the most part
these are different types of engines.

Matt O.



Hmm...that's odd. Other than the seawater pump and heat exchanger the
Perkins 4-108 in the ketch looks exactly like the Perkins 4-108 in English
tractors! The parts even fit!

"Larry" wrote in message
...
Matt O'Toole wrote in
news
Hmm...that's odd. Other than the seawater pump and heat exchanger the
Perkins 4-108 in the ketch looks exactly like the Perkins 4-108 in English
tractors! The parts even fit!

I was told, on a different series of engine, that the camshafts and valve
timing were different for a constant speed marine engine as compared to the
road engines.

Leanne