big deisels

[glashole]

in a sportfisherman style boat I have seen that the most common engines are either a detroit or a cat 3208

is there a reson for this
what does the 3208 stand for?

can anyone shed some light on preference with regards to longevity and overall power ot torque

this would be in the 40 -42 ft range

[The Hedgehog]

in a sportfisherman style boat I have seen that the most common engines are either a detroit or a cat 3208

is there a reson for this
what does the 3208 stand for?

can anyone shed some light on preference with regards to longevity and overall power ot torque

this would be in the 40 -42 ft range

My father has a set of 3208's in his 48. We would also like to know the answer to this. I like them.

I am getting some experience with the DD's. The 71 Naturals seem to run for ever. Boosted seem to run 2,000 - 3,000 hours.

You thinking about joining the Diesel Sportfish Club? I can see the merit to those.

[BUIZILLA]

in a sportfisherman style boat I have seen that the most common engines are either a detroit or a cat 3208

is there a reson for this
what does the 3208 stand for?

can anyone shed some light on preference with regards to longevity and overall power ot torque

this would be in the 40 -42 ft rangeif your looking at DD's and 3208's your looking in the 80's hulls.. 3208=636 inches of parent bore, non-liner engine.. 2800 rpm tops, 2400 cruise, mucho HP setups, we still do 3-4 a month, stay away from the 435 version, too peaky, smoky, and troublesome, 425 is fair, but the 375-400 is my fave> GREAT engines... I also like 6V92-550's and 6-71 450's in the 37-44' range, 8V92 for 44 and up, Cummins 420-450 8.3 C motors are pretty good but they started in the mid 90's, 450's can be dirty, 420-440 Yanmars are popular, but you better own a bank if they break..

[zelatore]

3208s? I thought this thread was about BIG diesels...:wink:

[gcarter]

3208s? I thought this thread was about BIG diesels...:wink:

LOL!
Kinda what I was thinkin'.
I think of big, I think of Stork, B&W, Colt Pielstick, GMT, and I know there's a bunch of newer, bigger stuff since I was involved in the '70's.

[Sweet Cheekz]

3412C's are pretty cool too

Parnell

[JimG]

I know where you can get a couple of nice 370 Yanmars...:wink:

[lars]

These articles by Tony Athens are ten years old, but the advice is still valuable.

http://www.sbmar.com/Articles/Choosing_the_Right_Diesel.php

http://www.sbmar.com/Articles/Engine_Life.php

http://www.sbmar.com/Articles/EngineLife-Loading.php

P.S. Asked a couple of my offshore sportfishing buddies and they all tend to agree with Jim. The 3208TA's 375hp, (see photo), are considered great engines in this class, 38'-42'. Cummins from the 80's era are reliable too, they claim. D.S.

[2landseers]

Here is a big diesel, Enterprise DMG-6

http://www.youtube.com/watch?v=H4cmHLJljfE (http://www.youtube.com/watch?v=H4cmHLJljfE)

I ran one like this for years as an engineer of a oyster boat.

This engine is an air in the cylinder start direct reversible engine. If you look at this link under the middle screw of the plexy glass you can see the cam follower for starting.

http://www.youtube.com/watch?v=hhozHs7awMI (http://www.youtube.com/watch?v=hhozHs7awMI)

[wrussellw]

Mann gets my vote in larger applications

[gcarter]

Here's a 14 cylinder, 7,000 HP (yep, 500 HP per cylinder) Colt Pielstick in a large tug/barge that was designed by the NA office I was working for in the early '70's.
There were two of these, each in its own engine room, for a total of 14,000 HP @ about 400 RPM.
This engine was air start, direct reversing also. In the picture, you can see the camshaft housing in the upper left corner of the picture.
You can see a yard worker sitting in the lower left hand corner.
I seem to remember these engines weighed over 200,000#, and the 4:1 reduction box weighed about half that.

http://www.donzi.net/forums/attachment.php?attachmentid=59266&stc=1&d=1286743666

[zelatore]

OK George, now you're just showing off....:wink:

Not that I wouldn't if I had some expereince with the really big stuff like that. I think the biggest stuff I've personally dealt with was about 1200 hp.

[gcarter]

OK George, now you're just showing off....:wink:

Not that I wouldn't if I had some expereince with the really big stuff like that. I think the biggest stuff I've personally dealt with was about 1200 hp.

Don, these were in the Cat Tug. During sea tials, they lost a piston and rod. These parts can be R & R, all in place. The big end rod bolts were about 3" in diameter. The torque specs for the rod bolts were 1,200 Lb/ft plus two "flats" of turn on the nuts!!!!!! :nilly:
I haven't a clue as to what that came out to, but it's a lot.

[glashole]

George

do you have any sort of idea what the fuel mileage would be on that? at 500 HP per cylinder

[gcarter]

These engines were very efficient and burned very slightly over
.3 Lb/HP/Hr, or about 570 gallons (US) per hour on both engines, and just under 50 gallons per mile.
Mind you it was over 700' long, 100' beam, and drew about 35', so it was really doing pretty good.

[zelatore]

Don, these were in the Cat Tug. During sea tials, they lost a piston and rod. These parts can be R & R, all in place. The big end rod bolts were about 3" in diameter. The torque specs for the rod bolts were 1,200 Lb/ft plus two "flats" of turn on the nuts!!!!!! :nilly:
I haven't a clue as to what that came out to, but it's a lot.

er, I don't think my torque wrench goes that high....

I complain when I work on a diesel and need a small crane to lift the head. I've never worked on anything where I'd need a crane to lift a piston!

Years ago, my father worked for Bucyrus Erie as a heavy equipment mechanic. As a kid, I was facinated with the 'giant' wrenches and sockets when he brought home his tool box after changing jobs. Don't drop that 3" socket - it might break your toe!