The one critical feature
like that, so you end up with lower power. How do I implement a good quality cricket and football turf at a low expense? bottoms and running at lower speeds, say around 20-22 kts. boat where the power range is applicable. Once started, they run until out of fuel. is its own fuel pump. 8 knots! out equivalency, the 3208 and 6-71 are similar, though the edge
Hence the hesitation. This
The incredibly reliable old 6-71 engine is in service world wide and powers everything from busses to generators to tug boats. Particularly the conversion
initial cost and repair and maintenance costs, these engines are
Problem is, that turbo air is hotter,
By the age of 10, I knew about superchargers, but I didnt have a clue about the two-stroke diesel that made this glorious and addictive racket. I have a pair of 671 marine diesels 485HP. David Pascoe is the
Compared to a MTU or Volvo, it is light; compared with Yanmar or
the best way to go, both from a cost and reliability stand point. [1] V-type versions of the 71 series were developed in 1957. For lightweight or smaller hotrods, the 3208 will
It has two sides and two turbines. This is a spectacular little power plant for those that like to
gone down the drain because you want to go fast. Detroit 671 Turbo Intercooled Marine Engine About this product About this product Best Selling in Complete Diesel Engines Caterpillar 267-8623 Marine Power Display Panel $14.99 New ---- Used Westerbeke 40510 M40B Genuine OEM Generator 75-130 Lb Engine Isolator Mount $169.96 New ---- Used Detroit Diesel #5119208 Exhaust Manifold Gasket. The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to
What do you care more about function/fishability of fancy looks? On a DD engine, each injector is operated by the dual
Diesel. more efficient. Jeff ,Do you plan on chartering your new boat or private use? The piston pins had worn thru the disc keepers, and the engines would run on lube oil. Again, this is possible because injectors are self-metering
If it is a help I can scan and email you the power and fuel consumption curves for the 6/71 NA Marine. Might aswell get a sailing boat and burn 3l/hr at that speed. smokier engine. offered at 850 hp @2300 but is now up to 1110 hp. [1] The engine cooling is via liquid in a water jacket. The turbo engine (6V71 T) will have a model number that starts with a 706 and will contain a 3 in the sixth digit, such as 7067-7301. I don't know if they have different gear ratios for the blower, but they don't need to. I rebuilt a couple back in the day, every part that wiggled was worn completely out. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. the reduction in weight is not needed, as people are discovering
I have a '73 43' MYDC with DD 6-71s rated at 216 HP. Engines such as the 12V92 have not compared as
similar. Neighbor had the 485's and spent years in litigation with J&T. So why is
For overall longevity, I'd opt for the 6-71 in any
These engines do very well in trawler service where they are generally not asked to make high hp. near the bottom. negates the virtues of those engines from a by-gone era. All were 2 stroke supercharged diesels. enough that weve had time to get a handle on general service
If the builder puts the right size
They
Street, Suite 100, Miami, FL 33128 - USA. they will fall down is in a larger boat with a deeper vee, simply
"Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems
intake valves next to the exhaust valves; the DD engine has only
on your door sooner rather than later. They burn about 38 gallons per hour. This naturally aspirated unit, for example, has a factory rated-output of 630 horsepower and 1,700 pound-feet of torque. As with Mercedes (to
myths about diesels. front end, or on the back. [1] The 71 refers to the displacement in cubic inches of each cylinder. I write all this stuff so
Caterpillar DD engines tend to be large
Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? At 1,200 RPM, the engine features an oil pressure of 40-55 PSI, airbox pressure of 1.1 inches mercury, and a fuel pressure at cylinder head of 40-60 PSI. The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. 3000 hrs on them. above are not the only factors. and therefore more rotational torque. dead center. I still think the Detroits are
to make it go faster. What props do you have 3 or 4 blade, cupped or non cupped and diam/pitch, I'm curious to know because mine are based on a 42 and are 25 x 26 non pitched 3 blade. you'd be blown away at the difference in overall size. They run great, I run them at 1950 RPM. most did not, so this is good news for buyers wanting to do
You got to get that
check out the. No problem, just buy it and bolt
Why? Been a while since I looked at it. Yes Johnson & Towers were the ones that bypassed the blower, I wasn't sure if it was them, Stewart & Stevenson or Palmer Johnson. In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. 2300 rpm 2300
Because it was never designed to dissipate those kind of heat
Steve Lusardi 2005-10-13 16:49:03 UTC. % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. for more potential trouble, but also increase efficiency considerably. Load Matching The criteria discussed
This actuates the injector plunger that pressurizes the fuel and
engine life.
I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. are brought to bear in following books. If you
Are they the J&T version? 550 hp while being prepared to follow the maintenance guide religiously. The Cat 3208 is a good, reliable engine that, like
Owners who keep the air cleaner and drain valve in good shape were always happy. Every engine in the 71 series had a bore of 4.25 inches and a stroke of 5.0 inches. Neglect it and Big Bill is going to knock
Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more! Checkout. faster. is attached to the same shaft, and pulls fresh air in and forces
power gain through this design. reliability and very long engine life beginning over a hundred years
Where is Cape Charles? These engines were pretty durable but would get a bad wrap sometimes when the owners didn't keep the airsep filter draining valve clean and the valves would get hot and drop a pie slice shaped piece into the cylinder. MTU Detroit Diesel, a Tognum Group subsidiary, opened a new Gulf Coast Sales and Operations center in St. Rose, Louisiana, dedicated to the growth of engine sales in the commercial marine industry. that they are delicate is not an overstatement. By Daniel F. Blanchard in forum Detroit Diesel, By john powers in forum Other Diesels Mfgs and General Diesel Questions, Forum Rules, Information and Announcements, Gas Inboard Engines, Inboard/Outboards, and Sterndrive Forum, Other Diesels Mfgs and General Diesel Questions, Miscellaneous Marine Engine Related Topics, Suggestions and Feedback regarding this board and the website, Suggestions / Feeback about the MarineEngine.com site, Test posting of messages, photos and formatting, I have sighted a Detroit Diesel 451 Marine Diesel engine in Mobile AL, 8.2 l detroit diesel will not come up to speed. Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. There are a huge number of variables that come into play,
Above post really says it all, either love them or hate them, we have one vessel powered by four V16's (basically 2 x 8 cyl bolted together), we also run 4-71 series in the generators, all the above are from the mid seventies and still screaming along, we took the turbo's off the 16 cylinders units to add some longevity but currently getting around 15'000 hours before we even thing about a rebuild. There's nothing like knowing the reason why you should spend more
Water or coolant can cause white smoke from a diesel engine as well. lane. Naturals (non-turboed) 6-71's are J&T 310hp. going to explain in detail why this is a difficult question to answer,
Because the turbo gets hot, it
Introduced in 1938, production ran until 1995. Cummins, with a similar type engine, has been grabbing their market
For high speed in a moderately light, express type
Reply Like 10-19-2009, 11:09 AM # 2 jjexpress Junior Member Thread Starter Join Date: Aug 2009 Posts: 22 Likes: 0 Received 0 Likes on 0 Posts So why cant you get a higher powered Cat? and no blower. Even though the turbo creates extra drag itself, it also allows
from Buying a Boat, Stress
The book says only 30 or 40 monograde oil for the Detroits and Alisons, but surely multi grades have improved enough over the past 20 years to be used. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. the same space requirement. Now here is where the DD gets all those extra working
And one more thing. overhauls is not uncommon. Coolant capacity is 7.5 gallons. 8.5-10 gallonsp er hour at 19-22mph. Very old technology (developed by Alex Winton in the 1920's, the 6-71 was first made in 1938), but very reliable and well proven. Every little deficiency becomes a major fault. horsepowers. It's always been the case
as long as you dont want to go fast. whereas in marine engines, we do. acute loss of power and other serious problems. popular with the commercial boat industry. Where
Tuned for commercial duty, it produced 165 horsepower. is where my 1:1 displacement/hp rule takes a dump. In big (100,000+ HP) marine 2 stroke diesels, they use electrically driven centrifugal blowers to scavenge during starting, and the turbochargers take over once the boost comes up with exhaust temperature. fires, sinkings, hull failures and machinery failure
[1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. Good luck with your search . I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! Using a pair of 425 hp
Yes, they are straight sixes with the turbo that gets 485hp out of them. All things being equal, engine longevity between the two
The amount if iron contained in the block makes a difference. because of the inefficiency of the hull. Unlike the two-stroke engine that most of us know from our experience with outboards, which relies on atmospheric pressure to feed the air/fuel/oil mixture to the crankcase and the movement of the piston to open and close the intake and exhaust ports in the wall of each cylinder, the two-stroke diesel requires a supercharger to fill the cylinder with air via passages in the block and ports in the cylinders liner. Fuel manifolds, which are cast internally within the cylinder head. TIA Don. Cummins Marine Crankshaft Replacement Parts. Of course, that is an utterly useless
Where's the beef? As I've
and DD engines evening out on the overall scorecard except for one
While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. than a spray nozzle like on the end of a garden hose, albeit a bit
because the blower can only blow so much air. the big, beefy blocks really stand out. (it had beaucoup problems), it wouldnt exist today. foot range boats because its a hard fit. - Diagram of typical Detroit diesel fuel system. for Caterpillar, theyve allowed their cylinder head problems
The series was introduced in 1974 as a rebored version of its then-popular sister series . But theres
There are two basic engine types, two cycle and
This heat has to be gotten rid of or we have a big problem
Diesel Parts Direct sells new and remanufactured Detroit Diesel parts. You can view forums as a guest. You must have JavaScript enabled in your browser to utilize the functionality of this website. parameters that questioners are capable of defining. The mechanical noise from the injectors was also very loud. A hard and realistic look at the marine market place and delves into issues of boat quality and durability that most other marine writers are unwilling to touch. Altogether, the engine delivers
Unlike a 4 cycle, the fuel metering is all controlled
On this Wikipedia the language links are at the top of the page across from the article title. little truck engines with all those aluminum parts hung on them. Kauna unahang parabula na inilimbag sa bhutan? more than 100 cu. The key to them is proper maintenance, I run them at 2250 rpm's all day long. 20knts. exhaust side has the turbine immediately after the exhaust manifold
The other turbine
care, though not necessarily at significantly higher cost. per hour total for both engines.