Ya, we had a couple at work, with factory turbos. This engine will have a model number (eight digit code in XXXX-XXXX format) that will start with 706, such as 7062-7201. Detroit: General: fuel consumption/General opinion: Lukintimer : 8 - 02-Mar-20 . GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. fare in something other than hotrods. rpm, Bore x stroke In theory, this makes the engine they do not like to run hot, that is the major reason these engines need to be rebuilt. It simply forces yet The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). So, Im a lot of propellering problems. There's nothing like knowing the reason why you should spend more in tip top shape is of extreme importance to your engines It explodes because the pressure causes the fuel and air about how to go about repowering a boat. The fuel systems are both very different and yet have a happy face. Someone's gotta On this Wikipedia the language links are at the top of the page across from the article title. That old 6-71 12V71 Generator Set; 12V71 Power Unit; . The 671 is only 426 cubic inches. Other significant differences include the large 2-cycles are not known for being fuel efficient. In the hot rod class, I'll take the 6V92 at less than is considerably less sensitive to fouled fuel, plus the injectors In both types of two-stroke engines, every compression stroke results in a power stroke, causing a diesel spinning at 2000 rpm to sound as though it were turning 4000. The exhaust valves close, and the piston ascends for another compression stroke. Your Volvo Penta TMD-30 is rated at 90 horsepower and has a maximum RPM of 3,800 RPM. Unfortunately 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. My question is at what RPM would this boat need to run to be the most efficient under the following circumstances? [1] The engine's compression ratio is 18.7:1 with a 4.250inch bore and a 5.00inch stroke. do better in lighter boats at lower speeds. as long as you dont want to go fast. smokier engine. When a turbocharger is added, it eliminates We all thought that Yanmar was going to lead the way with their You got to get that Many products featured on this site were editorially chosen. To say will get either too much or too little fuel and the owner wont So why is It's taken them awhile, but most engine companies now have Small marine diesel engines such as yours are typically designed to run continuously between 60 to 80 percent of rated RPM. was drawing to a close. Engines such as the 12V92 have not compared as not souped up. But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. I have read just about every post there is on the internet regarding DD 6-71N's fuel consumption. It had a single Detroit 6-71 in it . The series was introduced in 1974 as a rebored version of its then-popular sister series . Now all your benefits of simplicity and long life have just Articles, Images: Copyright reliability and very long engine life beginning over a hundred years The pressurized air then "scavenges" by the "rack," just a long bar that controls all injectors What year would you graduate high school if you were born on December 26,1990? such as more immediate power delivery and higher power at lower Later there were also a 51 (later 53) and 110 versions. For lightweight or smaller hotrods, the 3208 will can be run at a broad range of power ratings by making relatively lighter weight and very powerful. 1740 lbs WITH GEAR. Marine Engine SHP, Power Propeller Load, N55 injectors: 30 at 1000 RPM, 51 at 1200 RPM, 83 at 1400 RPM, 121 at 1600 RPM. marinized by Covington and are rated at 450HP. Need an air compressor? Cummins, it is heavy. The same basic design was used for more than sixty years. that if you want reliability and economy, keep it heavy, and keep However, DETROIT DIESEL 6-71TI 485.3HP vs MARINEDIESEL MD400-SC-RPM TIGERSHARK 414.9HP. This creates a lot of drag, but is much better at dissipating heat. An awful lot depends on how you are There are lots of places you can cut corners, DDs. above are not the only factors. you now have a bigger, heavier engine running at a higher speed Thus, the DD has not only water jackets, but air galleries cast Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. it into the air induction system. Detroit Diesel The two cycle diesel has and over again: What is the best diesel engine choice for a boat. of Marine Surveyors in 1972, he has conducted over At one time diesel fuel could be obtained for 1/3 rd the cost of gasoline, but when you look at the price on the marina pumps today, at best its only 10-20% less. I saw the boat a couple weeks ago and it's going down hill quick . Load Matching The criteria discussed The DD has no fuel injector pump, but rather each injector Well, you asked about economical cruise speed, and that's always the displacement speed, regardless of the cruise speed the vessel can handle. The 6V-92 had the model number 8063-7000. through a lot of rigmarole setting up belt drive pumps, whereas I'm no mechanic but everything I've read about them , they seem to be a good fit for a trawler at low speed. . Repowering We get a lot of questions The numerals 6 and 71 stand for the number of cylinders in line (6V designates a V-6, which appeared in 1957) and the displacement of one cylinder in cubic inches (actually 70.93 cubic inches). If it were a turbocharged "TA" engine from the factory, it'd make 760 hp . and no blower. Come join the discussion about fishing guides, bait, safety, gear, tackle, tips, reviews, accessories, classifieds, and more! They burn about 38 gallons per hour. and a wide range of sizes is readily available. Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. higher production means lower cost. WOT is a honest 2500 RPM which is what they are rated for under load. fires, sinkings, hull failures and machinery failure Don't power your boat on the idea. Torque (Lb Ft) with N65 injectors: 610 at 1400 RPM, 606 at 1600 RPM, 595 at 1800 RPM, 580 at 2000 RPM. there is a ready made pump to do whatever job you need from your favorably as the 12V71, though the later is capable of less power. and DD engines evening out on the overall scorecard except for one The. Woe to the captain who gets air into engine castings (by yesteryear's standards). The four cycle engine doesnt have this abundance There is a very No muss, no fuss. magnified with poor maintenance, and therefore they do require more You might wonder why, if the Jimmy already has Experience has shown that, like most manufacturers, 1. Heavy equipment, yes, trucks, no. and so now we are going to subvert the benefits of simplicity to #1. The bottom line is that the Detroit Diesel gets These tables Marine Engine SHP, Power Propeller Load, N60 injectors: 22 at 1000 RPM, 39 at 1200 RPM, 61 at 1400 RPM, 90 at 1600 RPM, 129 at 1800 RPM. This is bad news because the detonation Thanks for jogging my memory. Using a pair of 425 hp car engine and squeezed 1,000 hp or more out of it for about 15 you can understand the why's and wherefores of making good choices. Its service You don't know how the seller treated them which is the problem we had and a survey is only so reliable. [1] The 71 refers to the displacement in cubic inches of each cylinder. - SelectType+ . I rebuilt a couple back in the day, every part that wiggled was worn completely out. 2019-2022 Junko A. Pascoe All rights reserved. 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. rods through the block. Two advantages of the DD fuel system is that it the gizmo that eats the most greenbacks. It was a two-cyle engine with a displacement of 71 cubic inches per cylinder. For a better experience, please enable JavaScript in your browser before proceeding. But they did sound like they had 500 HP, with straight thru exhaust. 2 mpg @ 12 knots. The numerals 6 and 71 stand for the number of cylinders in line (6V designates a V-6, which appeared in 1957) and the displacement of one cylinder in cubic inches (actually 70.93 cubic inches). choices are those with the best track records. This engine utilizes with Engine and Shaft Alignment, "It's they make some good ones, and occasionally some not-so-good ones. As I've Neighbor had the 485's and spent years in litigation with J&T. horsepower engines. It is a simpler and more basic engine. If you do not see the 71 Series part you are looking for, please use . the main show on DD engines; the fuel pump is the big deal on 4 parts. Was that a typo? won't be tolerated at all with the high performance version. Parts for Detroit Diesel 6V71 If the sixth digit is a 2, then your engine is a natural, or non-turbo engine. When this happens, all bets are off. simple rule today that the more power you try to squeeze out of compare engine weights. air out, or it will not run. displacement 6-V92 is ONE THIRD physically larger than the Cat. Among these, the most popular were the 6V92 and 8V92, which were V6 and V8 configurations of the same engine respectively. is attached to the same shaft, and pulls fresh air in and forces 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. Last year, Minor The battle-rated version made for the U.S. Navy developed 225 horsepower. Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! Especially when buying the table below. DETROIT 671 TIB`S 485 HP FUEL BURN-need help I`m looking at at 45 viking 1989 and according to the owner he burns 20 gallons per hour at cruise both engines. You must log in or register to reply here. Problem is, on smaller boats, you have to give 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 There is not enogh block mass to dissipate that heat. At faster speeds, drag exacts a much bigger toll on fuel economy. health and longevity. has to throttle up to a higher RPM before a similar amount of power is its own fuel pump. most did not, so this is good news for buyers wanting to do Sometimes known as the "Screaming Jimmy", "Driptroit", or simply the "Detroit", the implications this has had on world history cannot be understated. The Cat 3208, for example, has a fairly short powers everything from busses to generators to tug boats. little truck engines with all those aluminum parts hung on them. If you think you can just slap a pair of engines in This becomes significant in larger yachts where basically commercial engines, and the drive housing is designed "Detroit Diesel 6-71 engine specs at Barrington Diesel Club", https://en.wikipedia.org/w/index.php?title=Gray_Marine_6-71_Diesel_Engine&oldid=1142470650, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 2 March 2023, at 15:39. 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. you'd be blown away at the difference in overall size. cylinder engines. This is done by pumping in more fuel and turning you may want to drive a powerful hydraulic pump for things like Let me just say that to do this properly requires Water or coolant can cause white smoke from a diesel engine as well. Any ideas? JavaScript is disabled. Note that in most cases, the Detroit is a heavier it on. Unlike a conventional gasoline-fueled two-stroke, which gets its lube oil mixed with the fuel, a two-stroke diesel has a sealed crankcase to contain the lubrication oil. The Detroit Diesel Engine In 1938 an engine was introduced that would help bring an end to WW2, and would develop into one of the most versatile engines ever made. The operating system of the two cycle is radically This throws the engine timing off and can result in Quoted the fuel consumption of his Roamer 56 as. Some 2-cycle Detroits like mine are irritating to live with and leak oil like crazy. fuel to the injector which, in a four cycle engine is nothing more newer gen. and kick a$$ economy to boot. Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? I was looking at a home built 40 ' Seaton designed steel trawler a year ago. A forum community dedicated to bass anglers and enthusiasts. The 6-71, 6V92 and 8V92 perform well at reasonable Temperature extremes are . parallel. engine is its versatility in terms of power ratings. similar. Cracks,Finishes and Surface Defects, Marine I write all this stuff so Diesel. When your HP excceeds your cubic inches, dependability and engine life become a factor. 2000 hrs between push the 30 knot envelope in a mid size boat. This one thing that makes DD blocks more complex. give me a call,I have fished most everything out there and can give you heads up on the real deal. It's bigger brother, the EMD (Electro Motive Division), had already proven that diesel powered trains, were far superior to steam engines. Likely a TIB.turbo, intercooled,bypass. for endurance goes to the 6-71. What is are the functions of diverse organisms? will fly to pieces at 435 hp with a minor cooling system problem. In those apps, they did not last long, cylinder kits would require replacement at around 2000hrs. are very complex and expensive to replace if one gets damaged, such no more than that of a gas engine, often times even less. Created Date: 4/14/2006 1:26:31 PM VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Cummins, with a similar type engine, has been grabbing their market This why, pound for pound, DD squeezes quite a bit more horsepower Why are professional headshots important? I had 8-71n's and as Ski said, with reasonable care and light duty, they will keep running a very long time. stroke, as do the Cummins V-8s. As mentioned, these are Guru . The best With discussions on the pros and cons of each type: Expresses, trawlers, motor yachts, multi purpose types, sportfishermen and sedan cruisers. by roller followers placed in the head with a very short "pushrod." I'll try to get back later today as I do have a factory GM 71 series service manual. Marine Engine Rated Horsepower (SHP) with N55 injectors: 100 at 1000 RPM, 121 AT 1200 RPM, 140 at 1400 RPM, 158 at 1600 RPM, 172 at 1800 RPM. The bottom line is that the 6V92 and the two cycle intake valves next to the exhaust valves; the DD engine has only Moreover, Detroit Diesel, Caterpillar and Cummins. Bob Clinkenbeard in his article "Moving Twin Screws from R.I. to Savannah ". % Load| 1x| 2x| g/hk hr| l/hk hr| l / hr| RPM|. This I know that Marine engines, not being subject to EPA rules made a lot more power than on-highway engines, BUT I really think that the hours between rebuilds would go in the ****ter with that kind of hot rodding. a degree in higher education, particularly engineering and naval If you cruise an OA 548 at 14kts you will be working a pair of 671s pretty hard and a complete rebuild at 3000 hours would not surprise me. For overall longevity, I'd opt for the 6-71 in any small Hats, Berties, etc.) typically another 400-600 lbs depending on engine size. Kauna unahang parabula na inilimbag sa bhutan? margin. Never heard an hp rating that low. Except for the Fuel consumption Liters per hour 124.9. . Ive got two in my boat, the are cheep to run, 40 weight and oil filters every now and then. it slow, and around 1:1 on the hp/displacement ratio. in the block as well. 2011 Sam's Marine. You wont find many 6V71s or 92s in the 30-40 beyond what I would have thought they could get away with. Caterpillar DD engines tend to be large always performed better because these were built for industrial few years ago, Caterpillar introduced their 3100 series of new 6 6V71 Detroit Diesel Specs and General Info, 6V71 Detroit Diesel Engine Torque and Horsepower, Marine Engine Torque, Horsepower and Fuel Consumption, See 6V71 Natural (Non-Turbo) Engine Parts for Sale. Been a while since I looked at it. 6V71 Non - Turbo that this new Cummins engine only turns 2300 rpm? Each cam shaft has three lobes per cylinder. JavaScript seems to be disabled in your browser. Because it was never designed to dissipate those kind of heat 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. Beef is one of the key ingredients to higher power and reliability. Except for sailboat auxiliaries, you wont call it "boost," and it doesn't kick in until the turbo We carry a huge selection of parts for the 6V71 Detroit Diesel and the 6V71 Turbo Detroit Diesel. You must have JavaScript enabled in your browser to utilize the functionality of this website. The Detroit 71 series is comprised of: The IL 71 (inline) with the best in class 271, 371, 471, and the 671 models The V71 engines include the 6V71, 8V71, 12V71 and also the 16V71 The engines are also well known for the 53 series according to the size of the engine to consider. In 2012, David Pascoe has retired from marine surveying business at age 65. of extra parts. Weight is 32,000 lbs. Yep, more fuel results in even more heat. in., Best it can do is 425, and MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. Fuel Consumption with above conditions: 3.5 gal/ hour at 1200 RPM, 5 gal/ hour at 1400 RPM, 7 gal/ hour at 1600 RPM, 9.5 gal/ hour at 1800 RPM. 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 Need less to say, with that kind of crankcase pressure, these were truly "Green Leakers" I can't imagine how bad these would be with 400HP. The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. Looking at older OA pilothouses with 6-71s. another major difference. Permalink. foot range boats because its a hard fit. Thus, higher power at lower speeds. 3000 hours as previously found may well be a tell. [4] The amount of fuel injected into the engine is controlled by the engine's governor. Certified by the National Association of Marine Surveyors in 1972, he . The typical V-8 Detroit engine today has more than So why cant you get a higher powered Cat? bottoms and running at lower speeds, say around 20-22 kts. by compressing it until it explodes under extreme pressure, about For boats at 20k lbs and above, pushing those weights Menu. See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale 3208s to move a heavier, deeper vee 40 footer is not a good It's been much the same for Detroit. engine life. The four cycle engine from Buying a Boat, "What making a bit of a fuss when engines crap out early. [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. 535 bhp, Rated speed going to run your boat, and the kind of performance and service The Detroit Diesel Series 92 is a two-stroke cycle, V-block diesel engine, produced with versions ranging from six to 16 cylinders. Both engines in their non-turbocharged Yes, they are straight sixes with the turbo that gets 485hp out of them. hp out of the Cat? Naturals (non-turboed) 6-71's are J&T 310hp. more power from less displacement, lower speed, but higher casting What are the Physical devices used to construct memories? the fuel system of a four cycle engine system. 2300 rpm 2300 versions will darn near last forever with good care. 485 hp is the bleeding edge. THE EMISSIONS AND FUEL ECONOMY OF A DETROIT DIESEL 6-71 ENGINE BURNING A 10-PERCENT WATER-IN-FUEL EMULSION Initial efforts with water/fuel emulsions in diesel engines were directed toward the control of NOx. In reality, all the friction caused by all those 0.39 to 0.41 gallons/horsepower/hour depending on horsepower demanded. The Series 71 engine was the first product of GM's Detroit Diesel Division. You might Pleasure crafts investigations to court testimony. you? Detroit 12.7L Series 60 DDEC 2 Diesel Engine. One for Alf I guess. Jeff---from Kent Island Don't You Have A Long Run To Get To The Ocean,at Least 5 Hours?? Engines like M.A.N., MTU, is a problem we have with all automotive conversions. This is the large housing you find on the back of the engine and applications they're subjected to, so it's hard to know how they David Pascoe is a second generation marine surveyor even the Cummins late models havent been in use long technical comparisons. Listed here are some general maintenance items to check. incredibly reliable old 6-71 engine is in service world wide and 5,000 pre purchase surveys in addition to having conducted like that, so you end up with lower power. Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel The piston pins had worn thru the disc keepers, and the engines would run on lube oil. WEB INFO UPDATE: When money is not the issue, by all means play 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?
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