Having grown up in the industry, I can say I've seen many DD's, Cats but
not to many sCummins run with well over 15.000hrs without a major O/H.
Longliners routinely leave their main runnng while offshore, They
usually start setting gear at sunset till late at nite, since the gear
is drifting after the last bouy/beacon goes over the side they need to
stay with the set till sunrise when haulback commences.

Some not all Offshore draggers will shut down and bring the nets back
aboard in the evenings if the catch drops off.4-7 days is the usual
trip, unless they do processing as well.

Offshore Scalloper's never shut down, its a 24hr operation with the crew
working shifts, and even the cook helps out with the haulback, culling,
and shucking, Depending on the area (Atlantic) the trip limits are set
by the co-op's, Like New Bedford won't buy from a boat thats been to sea
more than 10 days, but go down to Hampton,Va and the trip limits are 21
days.
Thats the way it used to be anyway. UD



http://community.webtv.net/capuglyda...inUglyDansJack

mark, you defended well a poster whose handle is "steve". Unfortunately, you
assumed "steve" is rational. if you knew "steve" a bit more from his wild
claims of knowledge, you would snicker at him like the seventh grade kids do.

The claim has been made by a poster on this ng who calls himself "steve"
that
diesel engines as used on commercial fishing boats are often torn down for
a
major overhaul after every trip to sea, about 700+ engine time.

Anyone here have experience with diesel engines in commercial fishing
boats?
do those guys really trust their lives to engines that won't go even a
thousand
hours? Anybody know why they do this?

A rebuild is done when necessary (obviously). I have heard that a 2-stroke
Detroit will last around 2500 to 3000 hrs (according to a specific owner).
Now in this case the owner I was talking to eventually traded from a 6-71 to
a large bore Isuzu marine diesel which he swears had over 4000 hrs on the
clock. Disney world would do a rebuild on their launches (3-53 Detroit's)
every year but then in the late 80's switched to Perkins 4-128(?) because
they felt the service time was twice that of the Detroit's (4k-5khrs). Now
in reference to the poster he may have been talking to somebody that only
had one ship (with a single) and they could not afford to brake down and
loose a load. So the cost of a rebuild would be much less then the lost of
a catch. Most commercial companies collect an oil sample at each change and
monitor the material in the oil. Companies like Blackstone can tell you
more that you would ever want to know about your engine. They can specify
oil change intervals, leaking gaskets, bad injectors, warn cylinder sleeves
and so on. So it is reasonable but I suspect its not the norm...

mark

yet, wayne, you let pass the claim of the poster whose handle is "steve" when
he said commercial fishing boats have their engines "torn down" after nearly
every trip. 4,000 hours is nearly six months continuous running time, while
8,000 hours is over eleven months.

do you suppose "steve" didn't know what the term "tear down" means?

The normal rebuild interval for a naturally aspirated (non-turbo)
Detroit 671 is in the range of 4,000 to 8,000 hours for an engine in
moderate service, that is well maintained, and has not experienced
cooling issues, etc.

so, jeff, you are the opinion that changing fuel filters is what is meant by
the term "tear down"?

btw, jeff, are you aware that commercial fishing boats have fuel manifolds that
make replacement of clogged fuel filters an on the fly event?

"steve", I was just taking your words at face value. Am I the only person
on
the planet who has done so in the last two decades?

tell us again that diesel engines as used in commercial fishing boats need
to
be "torn down" for a major overhaul after every several hundred hours
usage,
and how drunken, nervous crew "clean the fuel injector plugs" the night
before
leaving just to be sure.

The claim has been made by a poster on this ng who calls himself "steve"
that
diesel engines as used on commercial fishing boats are often torn down
for a
major overhaul after every trip to sea, about 700+ engine time.

Anyone here have experience with diesel engines in commercial fishing
boats?

do those guys really trust their lives to engines that won't go even a
thousand
hours? Anybody know why they do this?

For the environmentalists, Diesel fuel is easily biodegradable. If fact
without additives algae grows in the tank and lines. This algie and other
debris builds up in the tank and lines and and the fuel filters need to be
cleaned and the injectors need to be inspected and cleaned after extended
use. Also, when a boat is subject to heavy seas everything tends to hit the
filters. So when you need the engines the most your filters clog!

"Every trip to sea" could mean a month

a month is 700 hours. *you* tear down a diesel engine after 700 hours usage?

I'd think it would be
foolish not to do major preventative maintenance.

does that include cleaning the plugs on a diesel engine?

Ever been 200 miles from
land?

of course. still, though, not sure just how one might clean the plugs on a
diesel engine, as the poster who goes by the handle of "steve" claims.

thanks, dan, for the info.

now, we have the poster who calls himself "steve" claiming that commercial
fishing boats such as the Andrea Gail would "tear down" their engines after
nearly every trip of 4 to 7 days, about 100 to 170 hour engine usage.

Having grown up in the industry, I can say I've seen many DD's, Cats but
not to many sCummins run with well over 15.000hrs without a major O/H.
Longliners routinely leave their main runnng while offshore, They
usually start setting gear at sunset till late at nite, since the gear
is drifting after the last bouy/beacon goes over the side they need to
stay with the set till sunrise when haulback commences.

Some not all Offshore draggers will shut down and bring the nets back
aboard in the evenings if the catch drops off.4-7 days is the usual
trip, unless they do processing as well.

Offshore Scalloper's never shut down, its a 24hr operation with the crew
working shifts, and even the cook helps out with the haulback, culling,
and shucking, Depending on the area (Atlantic) the trip limits are set
by the co-op's, Like New Bedford won't buy from a boat thats been to sea
more than 10 days, but go down to Hampton,Va and the trip limits are 21
days.
Thats the way it used to be anyway. UD



http://community.webtv.net/capuglyda...inUglyDansJack

(Steven Shelikoff) wrote in message ...
On 13 Jul 2004 00:56:19 GMT, (JAXAshby) wrote:

The claim has been made by a poster on this ng who calls himself "steve" that
diesel engines as used on commercial fishing boats are often torn down for a
major overhaul after every trip to sea, about 700+ engine time.

Anyone here have experience with diesel engines in commercial fishing boats?
do those guys really trust their lives to engines that won't go even a thousand
hours? Anybody know why they do this?

Or is "steve" out to lunch?

Is this joxie the same person who claims that it's impossible to clean
the injectors of a diesel engine? Is this the same joxie who claims
that commercial fisherman go to sea for a month at a time on a single
engine without even checking it before they leave? Yup, that's our
idiot joxie.

Steve

But it's a gas engine he was referring to, remember? A gas engine
would be the only type of engine that would have any type of "plug" in
the engine room!!!!

kass****er, go to any marine dealer and tell the guy behind the parts counter
you want "some plugs" for your "yacht" engine. tell him you want to be sure
the plugs have been "cleaned" and you won't let him try to slip unclean plugs
in on you. To impress him so he knows who you are, wear your fake Rolex, a rug
and a gaudy pinkie ring. Tell him how big your woman's tits are now that she
had them fixed again. Lay your gold Visa card on the counter to let the guy
know you are serious about those plugs. Make sure to tell the guy you a a
Kitten diesel engine or maybe a Jim Dear or a DDD 44's or a Ky-Boatah or a
DEEtroit 7-61 with mechanical turbo-charger. Tell him your woman likes it on
top the steering wheel while your yacht is cruising along at 90 knots per hour.

The claim has been made by a poster on this ng who calls himself "steve"
that
diesel engines as used on commercial fishing boats are often torn down for
a
major overhaul after every trip to sea, about 700+ engine time.

Anyone here have experience with diesel engines in commercial fishing
boats?
do those guys really trust their lives to engines that won't go even a
thousand
hours? Anybody know why they do this?

Or is "steve" out to lunch?

Is this joxie the same person who claims that it's impossible to clean
the injectors of a diesel engine? Is this the same joxie who claims
that commercial fisherman go to sea for a month at a time on a single
engine without even checking it before they leave? Yup, that's our
idiot joxie.

Steve

But it's a gas engine he was referring to, remember? A gas engine
would be the only type of engine that would have any type of "plug" in
the engine room!!!!