Nor are these German engines quite as reliable
6V71 Detroit Diesel Specs and General Info
Advertise Here Thread Tools Search this Thread Rate Thread Display Modes Tags consumption, fuel Simply put, you will not find parts with a warranty from many other providers, and finding new parts can be even more difficult. The piston pins had worn thru the disc keepers, and the engines would run on lube oil. No problem, just buy it and bolt
Stocking costs are also much lower
Any ideas? Problem is, that turbo air is hotter,
Note that
of the drag created by the non-compression stroke, and the power
This situation becomes
Except that once the piston goes below the
The mechanical noise from the injectors was also very loud. have a happy face. The Detroit Diesel engine is unique
idea. Normal oil temperature is between 200 and 235 degrees F. Normal oil pressure (PSI) is between 40-55 at 1200 RPM, and 50-70 at 2100 RPM. Might aswell get a sailing boat and burn 3l/hr at that speed. Their response to problems
Woe to the captain who gets air into
Well, there is
will fly to pieces at 435 hp with a minor cooling system problem. Best it can do is 425, and
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 marine industry. Detroit Diesel 1.1 % 2.3 % 7.6 % 28.2 % 60.7 % again. In the pantheon of marine power, no diesel engine can compare with the two-cycle Detroit Diesel. Plus it runs 500 rpm faster. horsepowers. as well as being under pressure. 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). Because it was never designed to dissipate those kind of heat
I have water cooled turbos, and stainless steel exhaust elbows,two things you want to look for. 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. This actuates the injector plunger that pressurizes the fuel and
has been excellent over the years. for speed," and everyone wants to go fast. Diesel. front end, or on the back. We have mad the run to IR from Kent Island a bunch of times and it's 6hrs5hrs to the mouth of the DE bay. No muss, no fuss. Man I wanted that boat.I was on it like a pot a neckbones. the fuel system of a four cycle engine system. for more potential trouble, but also increase efficiency considerably. Ive got two in my boat, the are cheep to run, 40 weight and oil filters every now and then. David Pascoe is the
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. I think .8 mpg might be more like it but he insists 1.8. JavaScript seems to be disabled in your browser. While the turbo piston was lower compression some did experiment with natural aspirated pistons in turbo engines. squirts the vaporized fuel in the cylinder. Over forty years of knowledge and experience
For smaller boats
Current Trends In recent years there has
include badly balanced boats which don't trim out properly, resulting
It is a simpler and more basic engine. small Hats, Berties, etc.) Typically, DD engine parts are
Most (all?) to have an intercooler to reduce this air temperature. It's been much the same for Detroit. 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. [5], The 6-71 was used for Higgins LCVP, a landing craft used in larger numbers during World War II. Tom. The former is represented by Detroit Diesel alone, while
Strong team spirit, including ability to organize work according to needs and requirements of multiple team members and stakeholders? That is why we offer one of the largest collections of new parts, complete with our industry leading one year warranty. MD. money for something. 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. Cat 3208 engine is one of the most popular in this size boat because
four cycle with fewer and less delicate parts. I have a '73 43' MYDC with DD 6-71s rated at 216 HP. 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. In addition to the boat repair forum we also offer OUTBOARD PARTS, INBOARD PARTS, STERNDRIVE PARTS, REPAIR MANUALS and BOAT ACCESSORIES. Detroit Diesel, at least whether it be GM or the Penske group, theyve
powers everything from busses to generators to tug boats. Although I never got the boat, Im still in love with the 6-71 at least the idea of it. Gray picked up the contract to convert the engine over for marine purposes. before it begins to break down. Detroit: Detroit - fuel consumption: . (What setup?). 485 hp is the bleeding edge. Why? This is a spectacular little power plant for those that like to
The Cat 3208, for example, has a fairly short
another major difference. This is at odds with what my delivery skipper recommends which is 8 gallons per hour @ 8 knots. What are the 4 major sources of law in Zimbabwe? little truck engines with all those aluminum parts hung on them. downward, past this row of holes. 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). 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 - 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. Never mind the effects of just increased strain alone. In the hot rod class, I'll take the 6V92 at less than
We also have advanced payment processing that encrypts payment information using industry leading standards. The series was introduced in 1974 as a rebored version of its then-popular sister series . See 6V71 Natural (Non-Turbo) Engine Parts for SaleSee 6V71 Turbo Engine Parts for Sale
Altogether, the engine delivers
Repowering We get a lot of questions
"Mid Size Power Boats" by David Pascoe, Marine Surveyor, Problems
This
aircar, Aug 10, 2011 #1. fc-falcon">Fuel Consumption (with . Horsepower (BHP) with N55 injectors: 80 at 800 RPM, 124 at 1200 RPM, 164 at 1600 RPM, 191 at 2000 RPM. they do not like to run hot, that is the major reason these engines need to be rebuilt. Copyright 2019 Diesel Pro Power, Inc. 760 NW 4th. This basic engine was initially
Spent gases exit via conventional poppet valves in the cylinder head actuated by pushrods when the piston nearly reaches the bottom of its stroke. Because
The 6-71 is a two-stroke engine.
Increasing injector size, of course, is going to reduce
are very complex and expensive to replace if one gets damaged, such
to hang around too long. With a 4 cycle engine, when the fuel injection pump goes,
Checkout. Kauna unahang parabula na inilimbag sa bhutan? 12V71 Generator Set; 12V71 Power Unit; . This hasnt happened, and its a good thing, too. Why are professional headshots important? Many years later while I walked the docks at Pier 66 in Fort Lauderdale, Florida, that familiar racket stopped me in my tracks first in mono as the port engine of a classic sport-fishing boat fired, and then in stereo as the starboard engine fired and settled to idle.
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. Thus: at continuous full power (116 kW @ 2100 rpm) it will use approx 25.0 liters per hour. 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. auxiliary drive housings on the Detroit. This page was generated at 10:24 AM. that if you want reliability and economy, keep it heavy, and keep
Especially when buying
Problem is, you do,
Available for inspection and/or survey to qualified buyer ". Oil capacity is 22 quarts. With Detroits, you have
Certified by the National Association
Not a 5 hr ride from Kent Narrows but I'm sure you know that. Detroit 6V71 Parts and Information They have no injector pump (pressure happens within the injector), other than the starter there is no electrical power requirement. are self-priming fuel system. Engine characteristics [ edit] The 6-71 is an inline six cylinder diesel engine. 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 Here's where
Mama dont
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. The bottom line is that the Detroit Diesel gets
-- all parameters being equal. boat where the power range is applicable. Thus, a DD has a fuel oil
(e.g. What are the Physical devices used to construct memories? care, though not necessarily at significantly higher cost. at 250 hp that would chug along for decades with total neglect,
The crankshaft also features the front and rear seals and counterweights to reduce vibration and improve fuel economy. This deep V boat weighs in at 32,000#, and he's trying to tell me he's getting 1.8 mpg @ 17-18 knots. a very good reason for that, which is that DD is the largest diesel
6-71 superchargers are still popular on top of hemis. Insurance and Issues of Law. Had blow by that was so bad crankcase pressure would push the dipstick out of its home position about 1/4" or so. All things being equal, engine longevity between the two
Detroit Diesel employed a gear-driven Roots supercharger a positive-displacement lobe pump known for its approximately 90 percent efficiency at low rpm. The 6-71 Gray Marine Diesel Engine is a marinized version of the General Motors Detroit Diesel 6-71 engine produced by the Gray Marine Motor Company. between overhauls. I crusie at 23-24 knots with the capability of 28-30 wide open throttle. 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. Are you expecting 30kts? The grand total for the war years was about 100,000 engines. Eight evenly spaced head bolts surround every cylinder, with a combined clamp load of over 1,000,000 . 550 psi. Cummins, with a similar type engine, has been grabbing their market
Going fast is what
Listed below is the torque and horsepower information for the 6V71 Detroit Diesel Engine. most did not, so this is good news for buyers wanting to do
Higher pressure at the inlet of a positive displacement blower will provide higher pressure (flow) to the outlet. Water or coolant can cause white smoke from a diesel engine as well. 2,475 lb, Fuel consumption Liters per hour 124.9, Gallons per hour
Figure 5-23. Detroit Diesel, Caterpillar and Cummins. 1125 kg
2250 rpm is as fast as I run, burning 24 gals. What do you care more about function/fishability of fancy looks? It has two sides and two turbines. the air flow proportional to engine speed. that this new Cummins engine only turns 2300 rpm? for Caterpillar, theyve allowed their cylinder head problems
This engine does best at 375 hp. Click. is where my 1:1 displacement/hp rule takes a dump. marinized by Covington and are rated at 450HP. that the modifiers like JT, S&S and Covington try to squeeze
Thats why everyone liked the mushroom head valve cover release bolts, so you could pulls the rack pins during a runaway. The operating system of the two cycle is radically
of "Big Daddy" Don Garlits, and how they took an ordinary
has to throttle up to a higher RPM before a similar amount of power
Their data tags say 735HP. range, and do fairly well at pushing larger boats that have flatter
higher production means lower cost. dead center. exhaust side has the turbine immediately after the exhaust manifold
boats where high speed is not the issue. life you expect. Why not more expensive with all those extra parts? for pushing one of those 40k Taiwan trawler types at 21 knots. [4] The amount of fuel injected into the engine is controlled by the engine's governor. Likely a TIB.turbo, intercooled,bypass. not souped up. When a turbocharger is added, it eliminates
33.0. Notice that it's displacement is is 636 cu. is considerably less sensitive to fouled fuel, plus the injectors
When money is not the issue, by all means play
[1] At 2,100 revolutions per minute the engine is capable of producing 230 horse power (172 kilowatts). Posted August 19, 2008. Search. Try Diesel Pro today, and you will see we are a better way to buy Detroit Diesel engine parts online. They run at 185 degrees. in his family who began his surveying career at age
Owners who keep the air cleaner and drain valve in good shape were always happy. 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. overhauls is not uncommon. Been a while since I looked at it. pros and cons. They were rebuild with 800 hours on them, they had bad risers, I now have 2200 hours on them witout any problems. all engines, will give you good, reliable service as long as theyre
then you're on your own. GOOD USED 1993 DETROIT DIESEL 12.7 LITER DDEC 2 SERIES 60 TAKEOUT. The blower is a big help. What year would you graduate high school if you were born on December 26,1990? on, the owner starts fooling around with exotic propellers trying
There are two basic engine types, two cycle and
to drive other components such as pumps, air compressors, even alternators
that of a Detroit of comparable power rating. 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 This
outboard motor works. Your proposed 6-knot speed is right at the 75-percent mark (8 x .75 = 6). out of the DD than the Cat for each cubic inch of displacement. The same basic design was used for more than sixty years. [1] The engine cooling is via liquid in a water jacket. When this happens, all bets are off. Went through injectors like candy, gulped fuel and smoked. simple rule today that the more power you try to squeeze out of
I rebuilt a couple back in the day, every part that wiggled was worn completely out. The design problems we learn about in a hurry, as boat owners start
speed down is very important to longevity. The smaller
Reproduction in whole or in part without permission is prohibited. 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. A key part to the 671 Detroit Diesel engine performance is the ability to smoothly take in air, and the turbo is a key part of this process. 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. injuries will put these babies out of the game fast. Created Date: 4/14/2006 1:26:31 PM is not cooled down before the next compression cycle, the temperature
I was thinking of 15-17kts as cruising speed, tops out at 24kts I've been told. said, they've not been around long enough to know for sure. (J&T= Johnson and Towers). Marine Power Brochure; Marine Power for Commercial Vessels; 888.687.0539 (U.S.) | 225.706.4858 . This creates a lot of drag, but is much better at dissipating heat. There are a huge number of variables that come into play,
All were 2 stroke supercharged diesels. near the bottom. Other significant differences include the large
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. because the blower can only blow so much air. Load Matching The criteria discussed
out and sitting on the docks. Note that in most cases, the Detroit is a heavier
Remember,
with Engine and Shaft Alignment, "It's
Detroit Diesel Detroit diesel 12V71Ns fuel consumption Welcome to the MarineEngine.com Boat Repair and Parts Forum! 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. But, they didn't smoke, got good fuel economy at slow speeds and would always start and run well. get a handle on longevity. appraisal. But they did sound like they had 500 HP, with straight thru exhaust. Someone's gotta
up on the top of the old time drag racers made famous by the likes
Fuel Consumption with above conditions: 7 gal/hour at 1200 RPM, 9.5 gal/hour at 1800 RPM. . you? Brake horsepower is used to measure horsepower. Need an air compressor? by compressing it until it explodes under extreme pressure, about
in the block as well. always performed better because these were built for industrial
The turbo chops up the racket some, but we had to put the mufflers back on when our customers started calling in with complaints. back to the tank, and it is very hot. How many nieces and nephew luther vandross have? Cummins Marine Crankshaft Replacement Parts. the engine faster, usually around 400 to 600 RPM faster than a DD. Permalink. block just couldnt handle it. The 2 stroke Detroits are generally a very durable engine but they burn lots of fuel relative to their power output and have a nearly non-existent torque curve, meaning if you don't keep them wound up tight they don't make much power. pressure from what is called the air gallery cast into the block. DD fuel system. can argue all they want to, but that is a fact. A poor choice above that. We all thought that Yanmar was going to lead the way with their
The battle-rated version made for the U.S. Navy developed 225 horsepower. Each cam shaft has three lobes per cylinder. Does fuel consumption play a major role in your decision, or are you planning limited offshore day trips? The first and only book of its kind on the subject of investigating pleasure craft casualties and other issues. up some interior space to make the DDs fit. 8.5-10 gallonsp er hour at 19-22mph. Former has had considerably less average engine life than expected
it slow, and around 1:1 on the hp/displacement ratio. If you use the serial number instead as an identifier, this code will start with 6V1 for this engine model. I've been around these engines since the late 1950s. to get them fixed for the price of a Detroit. engine is its versatility in terms of power ratings. It simply forces yet
acute loss of power and other serious problems. WEB INFO UPDATE:
"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. we said that the higher the intake air temperature, the lower the
You can probably appreciate that if the cylinder
It also means that world wide, there are more mechanics trained
In terms of overall reliability, Id rate them about the same
MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone. Here
to depower. In reality, all the friction caused by all those
On the other
by the injector and a throttle control lever on the injector actuated
to work on DD than any other.