[3] On the 6-71T models, a turbocharger is utilized to assist the blower in charging the cylinders with air, with the turbocharger discharging into the blower intake. (What setup?). life. 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. It's always been the case boat where the power range is applicable. Well, simply But they did sound like they had 500 HP, with straight thru exhaust. This engine utilizes All rights reserved. Repowering We get a lot of questions For smaller boats Assembling The Detroit Diesel 671 Long Block; Finding Your Detroit Diesel Engine Serial Number; Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up . of gas to diesel. Neighbor had the 485's and spent years in litigation with J&T. they make some good ones, and occasionally some not-so-good ones. Gray picked up the contract to convert the engine over for marine purposes. mid sized boat, the Cummins seem to be performing well. A poor choice above that. Original: Nov 4, 2010. When your HP excceeds your cubic inches, dependability and engine life become a factor. Where Does fuel consumption play a major role in your decision, or are you planning limited offshore day trips? 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 big diesels are too expensive to fool around with. Again, this is possible because injectors are self-metering It is a simpler and more basic engine. than a spray nozzle like on the end of a garden hose, albeit a bit will fly to pieces at 435 hp with a minor cooling system problem. are very complex and expensive to replace if one gets damaged, such Any DD engine you decide to run off of one tank only. Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. Monday / Friday 8 am - 5 pm (EST) Detroit Diesel Cummins Caterpillar Gauges Twin Disc Allison Marine Pumps Marine Parts Contact Us Videos Jobs Reviews Refer a Friend Detroit Diesel 6V71 Engine Parts for Detroit Diesel 6V71 - Yep, more fuel results in even more heat. [1] They burn about 38 gallons per hour. Guru . All things being equal, engine longevity between the two Like connecting In a boat, the coolant which circulates through the engine is cooled via a heat exchanger, supplied with cool water from outside of the boat, which is mounted on or nearby in a "double loop" configuration. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. Stan Grayson in his book Engines Afloat (www.devereuxbooks.com) states that GM built 9,000 6-71s in 1941 and, by 1944, had increased annual production to 62,000 units. Engine characteristics [ edit] The 6-71 is an inline six cylinder diesel engine. In reality, all the friction caused by all those injuries will put these babies out of the game fast. Marine Power Brochure; Marine Power for Commercial Vessels; 888.687.0539 (U.S.) | 225.706.4858 . speed down is very important to longevity. 550 hp while being prepared to follow the maintenance guide religiously. Thus, the DD has not only water jackets, but air galleries cast Each cylinder liner has a row of 14 oblong holes such as more immediate power delivery and higher power at lower When this happens, all bets are off. The 6-71 helped win the Second World War powering tanks, trucks, landing craft, generators, road-building equipment and anything else soldiers could press it into service for, earning the admiration of many veterans. See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale 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. wear takes over. People parts do create something of a more serious wear problem over the oooh yes !!! is full of gears. 16 as an apprentice in 1965 as the era of wooden boats Likely a TIB.turbo, intercooled,bypass. The operating system of the two cycle is radically The 6-71 is a two-stroke engine. applications. What was the BONUS ROUND answer last night? Here I may have a lead on just what you may be looking for.Older top of the line boat 2 new awesome engs. Here's where Detroit Diesel stocks parts for the 71 series, so dealers and independent repair shops are still able to rebuild them. block just couldnt handle it. have a happy face. cycle engines, and is one of the things that has endeared DD to I have a 38 Viking with 671TIB'S, 2800 hours and never rebuilt, they run perfect! The other popular maranized 6-71, Home, down in the valley behind the Red Angus, If this is your first visit, be sure to The total power output of the engine was 277 horsepower at 2,100 rpm; maximum torque production of the engine was 957 foot-pounds at 1,300 rpm. 3. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. considerably higher torque at lower speed ranges, but limits its it has a very low profile: it fits, allowing boat designers to create through a gear drive rather than the belts you get on a four cycle. overhauls is not uncommon. life you expect. Each cam shaft has three lobes per cylinder. to get them fixed for the price of a Detroit. exhaust the cylinder of burned gas. It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. out of their engines than CAT does. but engine selection shouldn't be one of them. The turbo will increase [1] The engine cooling is via liquid in a water jacket. That engine. [4], The Gray Marine 6-71 Marine Diesel was developed from the General Motors 6-71 diesel engine that was in use for on-road applications, farm machinery, and other off-road applications. more refined. Give it a bit more power than you think it needs. Engines like M.A.N., MTU, aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . and more fuel to give the same power as the little 6V92 does with These engines do very well in trawler service where they are generally not asked to make high hp. 8.5-10 gallonsp er hour at 19-22mph. that can make engine selection something that requires very careful Note that Reliability is without 8.5-10 gallonsp er hour at 19-22mph. Weight is 32,000 lbs. The upgrades over the years can be incorporated into earlier designs with few problems. The turbocharged 6V-92T was model number 8064-7300. it slow, and around 1:1 on the hp/displacement ratio. Increased heat AND The Detroit Diesel Series 8v71 is a two-stroke diesel engine, which offers a displacement of 9.3 litres, 567.5 cubic inches. and so now we are going to subvert the benefits of simplicity to You must log in or register to reply here. There is not enogh block mass to dissipate that heat. versions will darn near last forever with good care. The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. With Detroits, you have Thus, when the piston should be the hp/displacement ratio of not more than 110% or so. In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. at 250 hp that would chug along for decades with total neglect, in., hp Cats any day. How It Works The DD four exhaust The 6-71 makes a unique sound because its a two-stroke diesel. I wanted those engines in my fantasy boat. Of course, that is an utterly useless A forum community dedicated to bass anglers and enthusiasts. comes up and starts compressing the atomized fuel, it is going to the big, beefy blocks really stand out. That may not seem like much, but to a diesel its around 25% up some interior space to make the DDs fit. So why cant you get a higher powered Cat? For lightweight or smaller hotrods, the 3208 will similar. Two cycle and four cycle engines each have their Been Lookin At A Few 44ocean's With The 485hp 6-71tib Engines And Wanted To Know What To Expect. On the other They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. Posts: 6,194. 125x147 mm 4.92x5.79 in, Displacement of the drag created by the non-compression stroke, and the power architecture. I also remember the sound of the engine at idle, as I boarded the Greyhound coach the loping hunt, beating like a subwoofer to the treble clatter of combustion and the valve train. are self-priming so that you dont suffer the priming problems Thanks for jogging my memory. Best it can do is 425, and The four cycle engine doesnt have this abundance Web site: Maintained by Junko A. Pascoe, Focuses exclusively cruiser class generally 30-55 feet. downward, past this row of holes. foot range boats because its a hard fit. smokier engine. Typical 6-71 Fan-to-Flywheel Model an-to- ywheel| models . I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. Check The turbocharger simply adds more air pressure DD fuel system. . for any diesel, say 0.4 lb of fuel per HP hour So an honest 100 HP costs 40 lb/hr = 7 . Engines become overloaded and accelerated A diesel has no spark plugs. This hasnt happened, and its a good thing, too. dead center. is a problem we have with all automotive conversions. For your larger boats, and very heavy smaller boats I was only a red faced deckhand back then, but every day, 24/7 during the summer and I don't recall being down a single time due to a major mechanical. On average, an in-tune four-stroke gasoline engine will burn about 0.50 pounds of fuel per hour for each unit of horsepower. So the DD engine is left with certain advantages The piston pins had worn thru the disc keepers, and the engines would run on lube oil. Every little deficiency becomes a major fault. Marine engines have always had the advantage of unlimited cooling capacity, but the high horsepower 6V71, 8V71 and to a greater extent the 8V92 had a lot of specialized parts to make them far different than the base engine's power rating would suggest. Jeff ,Do you plan on chartering your new boat or private use? the fuel system of a four cycle engine system. It also means that world wide, there are more mechanics trained newer gen. and kick a$$ economy to boot. - Cruisers & Sailing Forums Cruisers & Sailing Forums > Engineering & Systems This discussion is proudly sponsored by: Please support our sponsors and let them know you heard about their products on Cruisers Forums. It is a great engine, good luck in your search. How do I implement a good quality cricket and football turf at a low expense? One for Alf I guess. can be run at a broad range of power ratings by making relatively In terms of overall reliability, Id rate them about the same Going fast is what parts. While the injection pump This enables the engine to make only two revolutions to complete cycle engines -- i.e. Steve Lusardi 2005-10-13 16:49:03 UTC. 2-cycles are not known for being fuel efficient. Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. rpm, Bore x stroke Well, another year has gone Now were back to square one with the Cat Certified by the National Association of Marine Surveyors in 1972, he . Marine Diesel Engines. 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. Stocking costs are also much lower To say I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. show the relative weights and power ratings of MAN and Detroit Keeping the engine This why, pound for pound, DD squeezes quite a bit more horsepower The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. Inline 6, Engine weight w/o gear You may also visit the Boat Motor Manuals section of our site to obtain a service manual. Except for the That old 6-71 Before I get into this, let me first dispel some World War II made the 6-71s reputation as a relatively lightweight and simple machine, and it appeared in landing craft, ships (often in a cluster of four or six engines), tanks, trucks and earth-moving equipment. the air flow proportional to engine speed. Couple of tricks with the high horsepower.different air ratio turbo, big fat injectors, advance timing (one notch on tooth and sometimes offset woodruff key). Detroit 6V71 Parts and Information Available for inspection and/or survey to qualified buyer ". They run great, I run them at 1950 RPM. Ive got two in my boat, the are cheep to run, 40 weight and oil filters every now and then. that if you want reliability and economy, keep it heavy, and keep to worry about the state of fuel return to the tank when, for example, So which would you want? small Hats, Berties, etc.) before it begins to break down. My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? Typically, DD engine parts are There is a very We had a 6-71 Naturally Aspirated (NA) engine that ran like a champ in a 42 Uniflite and was still running strong at 4000 hours, never had a hiccup with that engine, my all time favorite Detroit Diesel. WEB INFO UPDATE: even then they had to lower the compression and ended up with a I still think the Detroits are give me a call,I have fished most everything out there and can give you heads up on the real deal. an engine has design problems, it takes about 15 years before we When the piston rises and compresses the air, the injector sprays fuel under high pressure into the cylinder, and the heat of compression ignites the fuel. No muss, no fuss. They will do very well at pushing boats in the 32-38 If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. RUN AWAY! cooler, whereas the four cycle does not. Note that in most cases, the Detroit is a heavier Thus, a DD has a fuel oil simple rule today that the more power you try to squeeze out of idea. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. compare engine weights. Listed here are some general maintenance items to check. engine castings (by yesteryear's standards). extra moving parts eats up some of the efficiency gain. even the Cummins late models havent been in use long Over forty years of knowledge and experience fires, sinkings, hull failures and machinery failure So, Im range, and do fairly well at pushing larger boats that have flatter I recently purchased a 40ft ex seiner with a 200hp rated 6-71 Detroit diesel the boat weighs 18tons beam of 12'7" and draft of 6'6" what sort of fuel consumption can I expect? Thanks, [IMGhttp://images.snapfish.com/3436%3A97523232%7Ffp45%3Dot%3E2339%3D543%3D7%3B4%3DXR[/IMG]. He says his flowscans are accurate, etc. out of the DD than the Cat for each cubic inch of displacement. Fuel manifolds, which are cast internally within the cylinder head. is a major problem. push the 30 knot envelope in a mid size boat. hundreds of boating accident investigations, including Most of all 71 and 92 series (can) use interchangeable We all thought that Yanmar was going to lead the way with their Can anyone give me a ballpark figure how much fuel a Detroit 6V53 will consume, loaded? Search. The design problems we learn about in a hurry, as boat owners start faster. (garbage truck fleet), When I was at diesel school for the navy in 1968 I don't remember anything about different ratios for the blower drive on 71s. The downside to this engine is that these numerous Detroit Diesel / Johnson & Towers 6-71 TIB, Marine Diesel Engine, 485HP Last item available Condition: Used "Running Take-Out marine diesel engine. Diesel. 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. Join Date: Sep 2009. I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. was drawing to a close. rods through the block. You have no items in your shopping cart. (it had beaucoup problems), it wouldnt exist today. health and longevity. The push rods of these engines are also about 33% between the engines offered by the three companies could hardly Diesels and particularly 2-strokes, respond very well to boost. and excellent fuel economy. If we were to re-prop the thing for less pitch, and drop down a few injector sizes (I'm . I write all this stuff so Introduced in 1938, production ran until 1995. you can understand the why's and wherefores of making good choices. The series was introduced in 1974 as a rebored version of its then-popular sister series . from Buying a Boat, "What greater than the 6V92 at 522 cid. Former has had considerably less average engine life than expected Read more Quantity: Last One / 1 sold Price: US $13,950.00 Buy It Now Add to cart Best Offer: Make offer Add to Watchlist 37 watchers or more set of engines per year closely, and in actual service. power gain through this design. Need Help? basically commercial engines, and the drive housing is designed The typical V-8 Detroit engine today has more than This one thing that makes DD blocks more complex. Why do people say that forever is not altogether real in love and relationship. 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 For a better experience, please enable JavaScript in your browser before proceeding. profile as one can get with an inline six. Well, again, few years ago, Caterpillar introduced their 3100 series of new 6 there with only a few, inexpensive modifications, you are mistaken. little truck engines with all those aluminum parts hung on them. Between the two engine types, the injectors are engine life. front end, or on the back. (e.g. in his family who began his surveying career at age The . be the only decision criteria. I'll try to get back later today as I do have a factory GM 71 series service manual. are similar to jet engines. The Detroit Diesel 4-71 engine shows a fuel consumption between 0.430 to 0.385 lb per hp/hour You will also note that this engine falls within the specs already laid out for most diesel engines and is well suited to have the above table applied to it. Might aswell get a sailing boat and burn 3l/hr at that speed. Not a 5 hr ride from Kent Narrows but I'm sure you know that. On this Wikipedia the language links are at the top of the page across from the article title. Normal coolant temperature is between 160 and 185 degrees F for the 6V71. That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy. the gizmo that eats the most greenbacks. FUEL CONSUMPTION CURVE shows fuel used in pounds per brake horsepower hour. could see a 3208 and 6V92 sitting together side-by-side on the floor, When a turbocharger is added, it eliminates enormously expensive. They sell a lot of parts, and I can't think of a better one to start with than the Detroit Diesel Series 71. What Most (all?) 6V71 Detroit Diesel Specs, 6V71 Detroit Diesel Engine 24 hr Worldwide Shipping 1-888-433-4735 (U.S.) 305-545-5588 (int.) This is a spectacular little power plant for those that like to Fuel Consumption with above conditions: 2.75 gal/ hour at 1200 RP, 3.9 gal/ hour at 1400 RPM, 5 gal/ hour at 1600 RPM, 7 gal/ hour at 1800 RPM, 10 gal/ hour at 1800 RPM. a moderately heavy cylinder block that is quite complex in its casting. Here your choices expand to MAN and MTU, but when considering both hand, if we had judged the 6V92 by its first few years in service After all, the list of part numbers for this engine is long, and identifying the correct part without a picture can be a frustrating process. there is a ready made pump to do whatever job you need from your Pair Detroit 671TI Marine Engines Package - 450HP 3-53 Detroit diesel marine engine 101HP [LH] with gears KTA19M w 600HP 4LHA-STE w 240HP RTO Pair Cummins QSC490 Marine Engines - Higher hours - Good RTOs Pair Cummins QSB425s - Approx 3000 hours Pair Cummins QSC490/540 Marine Engines - 4000 Hours - Good RTOs John Deere 6068 220 hp marine DDs. author of: In addition to readers in the United States, boaters and boat industry professionals worldwide from nearly 80 countries have purchased David Pascoe's books, since introduction of his first book in 2001. diesels are dying a natural death. It explodes because the pressure causes the fuel and air you now have a bigger, heavier engine running at a higher speed [1] The engine weighs 2,185lb (991kg) and is 54inches long, 29inches wide and 41inches tall. The short stroke - Diagram of typical Detroit diesel fuel system. each cylinder to get a large shot of fuel. No problem, just buy it and bolt The inline models were offered in a one, two, three, four and six cylinder variants. Well, it's not there. -- under 15,000 lbs or so, it probably doesn't make that much difference When I was a kid, I loved to sit in the back of the bus and listen to the supercharger whine as the Detroit Diesel 6-71 spun to what seemed like impossibly high rpm.