Detriot 671TI

Logan9581 · 03-12-2007, 07:44 PM

Anyone know anything about these engines?
They are re-built with about 500 hrs on them.

Reason we are looking is we blew an engine on the way home from Bimini and are looking into a better boat for doing the kind of fishing the owner is getting into.

Deep C · 03-12-2007, 07:50 PM

Tough to blow one of them. In 5000 hours or more with them under my decks I cracked a head and some turbo seals... along with other little odds and ends.

What type engine did you pop? When you say blown. Did you bust a crank or throw a rod? Swallow a valve? Lose oil pressure? There are a lot of things that can happen.
The 671 is one of the toughest sob engines out there and are fairly easy to rebuld. Probably some drop in rebuilts around too... I've seen a load of them with 20-30000 hours on them and running fine...

blackwell50 · 03-12-2007, 07:56 PM

good motors,a little leaky but they run forever.Don't forget to use only straight 40 wt.oil in them.NO multigrades.

Logan9581 · 03-12-2007, 08:06 PM

Thats what I've heard about them too. Anyone else with info, please let me know.

We blew a gas crusader. Its the newer 6.0 liter. 300 hours later there is a hole in the block just above the oil pan that I can fit my fist in. There are broken rods and pieces of piston in the bildge along with about a gallon of oil. So the boat is sitting in stuart waiting to get pulled. Luckly the warranty is covering it all.

Deep C · 03-12-2007, 08:11 PM

Well that explains blowing a mill... All gas inboard makes are on my shit list anymore. Blowing up a couple sets of brand new Volvos in the Reel Delight left curt and I with a bad taste in my mouth. I could go buy a good condition Albie with gas for less than half of what I have invested in mine but it will never happen.

freebird2 · 03-12-2007, 08:26 PM

If you take of them Detroits they will last forever. We run a 8V92 the most I turn her is 1825 supposed to turn them 2000 but it seems much over 1800 they start to leak oil pretty bad.

Bay Fishin · 03-12-2007, 11:32 PM

I have heard alot of god and bad about the Detriot 671TI. What horsepower are the ones youre looking at? I believe at 450 is about as much horsepower as they should put out. Great engines have been around forever. J&T up this way is selling new blocks for about 10k.

BIGGESTJACK · 03-14-2007, 10:13 PM

THE HEAT THAT THE TI'S GENERATE MAKES THEY NEED A LOT MORE ATTENTION THEN THE 671 NATURAL. HOW OLD ARE THE BLOCKS?

JD5652 · 03-15-2007, 03:14 PM

What specfically do you want to know?? I have 1989 vintage twin J&T 671-TI with wet turbos in a Ocean 44 SS and have done quite a bit of maintenance on them over the last two years.

If you're looking for all around type info, visit boatdiesel.com ...a wealth of info on there.

Otherwise ask away and I'll try to help.

Like others have said, these engines are like tanks. Just have to be somewhat careful when you start turbocharging them. Most problems are generated by operator error (e.g...running them too hard) or in the initial set-up (over-propping) .

Capt. Squiddly · 03-16-2007, 03:21 AM

How are they compared to JT 6V92's?

03-12-2007, 07:44 PM	#1
Logan9581 Sit down Shut up And fish Join Date: Oct 2005 Location: Bradenton, FL Posts: 582 Credits: 3,834.2 Boat: 27 Oceanmaster, 18 Mako Flats	Detriot 671TI Anyone know anything about these engines? They are re-built with about 500 hrs on them. Reason we are looking is we blew an engine on the way home from Bimini and are looking into a better boat for doing the kind of fishing the owner is getting into. __________________ Capt. Logan Bradenton, FL www.mycatchlog.com

03-12-2007, 07:50 PM	#2
Deep C Master of all things wet Join Date: Mar 2005 Location: The Plywood State Posts: 11,448 Credits: 12,167.1 Boat: Several Home Port: Palm Beach Best Catch: Mrs Deep Occupation: Killin Stuff	Tough to blow one of them. In 5000 hours or more with them under my decks I cracked a head and some turbo seals... along with other little odds and ends. What type engine did you pop? When you say blown. Did you bust a crank or throw a rod? Swallow a valve? Lose oil pressure? There are a lot of things that can happen. The 671 is one of the toughest sob engines out there and are fairly easy to rebuld. Probably some drop in rebuilts around too... I've seen a load of them with 20-30000 hours on them and running fine... __________________ C Gull 20' Aquasprt: Florida Deep C 27'Albemarle: Florida/ Bahamas Mirage 23' Contender: New Jersey Mirage 31' Contender: Florida Mirage 43' Viking: New Jersey, Bahamas http://www.sportfishermen.com/deepc/

03-12-2007, 07:56 PM	#3
blackwell50 I think Admin is going to let me have this space Join Date: Sep 2006 Location: Ft. Lauderdale,Fl. Posts: 1,360 Credits: 1,313.3 Occupation: sportfish captain	good motors,a little leaky but they run forever.Don't forget to use only straight 40 wt.oil in them.NO multigrades. __________________

03-12-2007, 08:06 PM	#4
Logan9581 Sit down Shut up And fish Join Date: Oct 2005 Location: Bradenton, FL Posts: 582 Credits: 3,834.2 Boat: 27 Oceanmaster, 18 Mako Flats	Thats what I've heard about them too. Anyone else with info, please let me know. We blew a gas crusader. Its the newer 6.0 liter. 300 hours later there is a hole in the block just above the oil pan that I can fit my fist in. There are broken rods and pieces of piston in the bildge along with about a gallon of oil. So the boat is sitting in stuart waiting to get pulled. Luckly the warranty is covering it all. __________________ Capt. Logan Bradenton, FL www.mycatchlog.com Last edited by Jer; 03-31-2007 at 11:23 PM.

03-12-2007, 08:11 PM	#5
Deep C Master of all things wet Join Date: Mar 2005 Location: The Plywood State Posts: 11,448 Credits: 12,167.1 Boat: Several Home Port: Palm Beach Best Catch: Mrs Deep Occupation: Killin Stuff	Well that explains blowing a mill... All gas inboard makes are on my shit list anymore. Blowing up a couple sets of brand new Volvos in the Reel Delight left curt and I with a bad taste in my mouth. I could go buy a good condition Albie with gas for less than half of what I have invested in mine but it will never happen. __________________ C Gull 20' Aquasprt: Florida Deep C 27'Albemarle: Florida/ Bahamas Mirage 23' Contender: New Jersey Mirage 31' Contender: Florida Mirage 43' Viking: New Jersey, Bahamas http://www.sportfishermen.com/deepc/

03-12-2007, 08:26 PM	#6
freebird2 Crab mustard is good Join Date: May 2005 Location: Morehead City Posts: 733 Credits: 1,539.6 Boat: 60 Ft Davis Home Port: Morehead City, NC Best Catch: Rockyn Robyn Occupation: Charter Captain	If you take of them Detroits they will last forever. We run a 8V92 the most I turn her is 1825 supposed to turn them 2000 but it seems much over 1800 they start to leak oil pretty bad. __________________ Capt. Shane Second To None Charters 252-422-0066 Morehead City, NC

03-12-2007, 11:32 PM	#7
Bay Fishin Crab mustard is good Join Date: Oct 2005 Location: Annapolis,Md Posts: 746 Credits: 1,396.2 Occupation: Tackle Ho, Boat Detailing	I have heard alot of god and bad about the Detriot 671TI. What horsepower are the ones youre looking at? I believe at 450 is about as much horsepower as they should put out. Great engines have been around forever. J&T up this way is selling new blocks for about 10k.

03-14-2007, 10:13 PM	#8
BIGGESTJACK I Need More Posts Join Date: Apr 2005 Location: WILDWOOD & MT. LAUREL NJ Posts: 8 Credits: 1,183.0 Occupation: NOTHING	THE HEAT THAT THE TI'S GENERATE MAKES THEY NEED A LOT MORE ATTENTION THEN THE 671 NATURAL. HOW OLD ARE THE BLOCKS?

03-15-2007, 03:14 PM	#9
JD5652 I think Admin is going to let me have this space Join Date: Feb 2005 Location: CT & MHC Posts: 2,305 Credits: 1,439.8 Occupation: Nuclear Stuff	What specfically do you want to know?? I have 1989 vintage twin J&T 671-TI with wet turbos in a Ocean 44 SS and have done quite a bit of maintenance on them over the last two years. If you're looking for all around type info, visit boatdiesel.com ...a wealth of info on there. Otherwise ask away and I'll try to help. Like others have said, these engines are like tanks. Just have to be somewhat careful when you start turbocharging them. Most problems are generated by operator error (e.g...running them too hard) or in the initial set-up (over-propping) . __________________ JD Maggie B Ocean 44 SS

03-16-2007, 03:21 AM	#10
Capt. Squiddly Anthony's Ark is a blowboater Join Date: Oct 2006 Posts: 347 Credits: 1,289.3 Home Port: Harwich	How are they compared to JT 6V92's?

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