I drove an Attack Troop Carrier with two Grey Marine 671's in Vietnam. It was a converted WWII LCM where you had to handle 25 tons deftly using two D-handle four-foot joysticks. I would twist for power on each engine and shift forward or backward for differential thrust. You could pivot the beast very gracefully when needed. Like coming into a pier against a strong current. Many a night sleeping next to them while the night watch drove going up rivers and canals through the jungle. The 671 sound and smell is still hammered into my night memories. I remember dreaming about home then waking up to the nightmare - just the opposite of normal life.

@hedgepethracing9590

Жыл бұрын

Thank you man I appreciate you !

I was an engineer on tugboats in the late 80’s, we ran twin Detroit 16V71’s, we ran 24-7 year round, only down time was engine rebuilds in the shipyard. I use to change the oil and filters while we were underway, shut 1 down ,change fluids, start back up, then the other, the only downfall was the oil and filters were extremely 🥵 hot. Love these Detroit marine engines.

@tonyfaconi3442

4 жыл бұрын

c: Methods we were in the company shipyard annually, for engine overhaul,and reduction gear maintenance, i worked the same boat for three years and never saw the engine blocks replaced. I’m now a Lineman supervisor in the communication industry, but working on the tugboats was by far the best job I’ve ever had!

@gravelydon7072

3 жыл бұрын

@Methods Our 12V71s ran for 10, 12, and 14 thousand hours before we overhauled them. When I left, the 12k unit had 28k on the block, crank, rods,, cams and 16k on the parts that we replaced ( Heads, pistons, liners&shims, N70 injectors, gaskets&seals, blowers, and bearings ). Once the engine was back in service and I tuned it, the only things done were upgrades and oil changes. We went from the canister filters to spin on remotes and upgraded from a mechanical governor to an electronic one. The last was done so that we could operate them from a computer in the office instead of having to run them from the engine room floor for normal operations. In an emergency, we could run them still from the engine control panel. In a major emergency we could run them from the engine itself. Our engines when I left had been in service for 24 years. I had been there 18 of those years.

@carmineredd1198

3 жыл бұрын

very hot is why we used nitrous oxide

That boat is a classic !!! Good job getting her going !!! Might look a little drab now but she will shine up pretty with a little elbow grease and some research on KZread for some polishing ideas!!!!😊

When my dad was around and put his car in for a service he'd tell the proprietor: "I want to see gray headed people working on my vehicle!" I now understand what he meant. Nice job, well done sir!

I have got to say, I really enjoy watching you guys.

This video brings back a lot of good memories. When I was in Sea Scouts (BSA) we had a single 6-71 Gray Marine (now called Detroit Diesel) in our 40ft launch. What a wonderful engine. I remember the 12v starter was rated at 9.6v @ 900A. Our 8D batteries never seemed to have a good charge so we would wire two in series and hit the starter with 24V. It always started right up. Some time we would put pennies under three rocker arms on exhaust valves for compression release, and start the 6-71 on three cylinders. Once running we would pull the pennies out with a pair of pliers with a short va-room as each penny came out. We then screwed the valve cover back on and were good to go for the day. It was great fun and a lot of learning for a 16 year old.

@osu3221

2 жыл бұрын

I always used a spring starter.

I love that you make no complaints; you work with what is there and make it work. A great attitude!

I am a retired bus operator from BC. I have a lot of GM time. Not only their engines but their buses too. The buses were all inter-city types. After 30 years driving scheds and charters I quit and started running tourboats and watertaxis close to home. I had fun watching you go through the procedures and commend your slow as she goes approach. Many guys will jump in and turn the key to see if she'll start. If it does, they walk away leaving the owner to uncover problems like loose prop nuts and fifteen gallons of water in the tank. IMHO, the tank or tanks should be properly drained cleaned and the fuel can be scrubbed or cleaned for use again. In any case as you said you caught it just in time. People including myself are amazed at the amount of water collected due to condensation in the tank collecting over many months or even years. I wouldn't say no to working on engine repair on boats. People are willing to pay good money for someone who is good at their profession. I'm sure at some point Pam will pass your name on to someone who needs a good mechanic.

I have been watching these videos for a while, and I will say, this man is not just a mechanic, he is a Doctor.

Boats are such endless money pits as they age , been there done that but I still love them , great to see guys who really know their stuff , Awesome channel .

So some other viewer noticed how he behaves. As a tech i always was pleased to be working. He has an attitude successful wrenches has. He never complains and conducts himself in a professional manner. I love seeing us represented that way!

@daxtonlukas8892

2 жыл бұрын

Instablaster.

@marshalllhiepler

2 жыл бұрын

Yes, absolutely. However, sometimes it is healthy to utter a few choice words ( as long as no one is near enough to hear them). It serves as a "mental reset" to alleviate stress, and allows you to return to the task at hand, with a fresh outlook. Honestly ... its something that only the life-long mechanic can truly understand.

My boat had 6-71N mains, and a 2-53 genset. Never missed a beat. Great engines.

Great Video..Love the sound of Detroit Diesel's!! Being a Bus Mechanic 34 years I first cut my teeth on 8V71 Detroit Diesel's to 8V92 and 6V92 series with Turbos.. I miss rebuilding those engines! Now work on Detroit Diesel Series 60's and newer and Volvo D-13's..But I sure miss the days of injector picks and adjusting the governors on those engines..especially the sound of them in GMC or MCI buses!! Great video.. I need to find a boat with twin Detroit"s in it now since mine currently have Ford 427's in her! Lol.

I just found your channel and subscribed, I love watching a person with the knowledge and inclination and Tools figure out why something isn’t working and then fix it. I am trying to teach my kids and I want my triplets full sets of tools five years ago and they still have not open the boxes from Home Depot. Only a $60 tool set but it’s almost enough to take apart a car motor 132 pieces. This is what I grew up doing and my dad was a Ford mechanic never took auto shop in school and I was the lucky one and 77 they still had auto metal and wood shops in my high school and even in junior high there was metal and wood shops.You KZreadrs will be the new teachers of the younger generation so keep up the good work and explain what you’re doing as you work on whatever you are working on. Thank you sir for your help.

As a boat lover and had my own marine engineering company, loved working on those boats. Great video thanks. Condensation from half full tanks would do that...Great memories 😆 Good video thanks.

A Detroit 6-71 was a great engine in its time. You could say that about nearly every Detroit diesel from the ‘80’s and back. Had a 12-71 in a truck and a 4-53 in a car crusher and they were extremely durable and very low maintenance - prone to some oil leaks but that’s it.

Thanks for your time. I really enjoy seeing you working on these engines. Never thought that you did boats too.

Wow.. okay, I am sold. You guys know what you're doing and I will be watching you videos. Very awesome thank you.

Your thoroughness and knowledge are awesome.

What a great sound to hear both engines perring. Thanks for taking us along 100 points

That boat hasn't had much love in a long time.

@pauldionne1665

3 жыл бұрын

11

Just subbed. Love to see when a person REALLY knows their business!!!!! Lovin' this video!

You are very thorough! You saved rhe customer from many more headaches....

Watching these videos I've learned a ton about things I'm guaranteed never to use. I'm hoping what I now know will make me fun at parties.

Such a beautiful sound, 2 stroke Detroit Diesels give me goose bumps!!

@schottelbootgmdetroitdiese9601

4 жыл бұрын

Yeah i l i ke them

@philzail2532

4 жыл бұрын

They smell like victory, LOL!

@jeremy4192

4 жыл бұрын

My god I feel exactly the same way.

That was hilarious when you showed how far away your bus was.

I really appreciate the cautious, step by step approach in evidence here, and Scott's knowledge of this engine type that lies behind it ! I am learning a good deal about the 6-71 that I haven't gleaned from old manuals..very practical ! Always a chance I will end up with an old detroit 2 stroke powered boat .so glad to file this away, just in case !

Retired now , but I've seen those old DD marine engine run with busted liners . A little smoky and wouldn't pull past 1600 , but it kept on running until shut down . New piston and liner kit , 1 new injector , a new head [just cause ] and back in service . Took 26 hours plus 6 hrs. to fly the parts out to us .

Your skills are first class, boat has potential.

The way that starter acted, I figured it hung up during Runaway & self destruction set in. Marine service engines have a difficult job, but that starboard engine sounded so good. I'd love to get that kind of power in a truck engine. Way Cool.

I really enjoy your videos. Thank you for sharing your knowledge and passion.

Trouble shooting skills like yours are hard to find. Thanks for posting this.

Nice to have the videos on this boat all put together bro. All the best from NZ

There was a feature on locomotive EMD diesels (GM) two stroke that always saved the day. Each cylinder had a "flash cock" that was opened before cranking. Any water in the cylinder was blown out the flash cock before starting. After cranking several revolutions, the flash cock was closed and engine was started.

Great video, your sir have a great skill set, im a bus mechanic only wish we had a dozen of you working at my depot, thanks for update as well, hope the owner can get out and enjoy that old rig.

You are a damn good Detroit mechanic, I enjoy watching your stuff.

Looking at getting a boat with these motors. Thanks for your insight and fault clearing procedures.

I've worked for a while at a marina in Fox lake Illinois there was a pretty big 80's houseboat that had twin 6 Detroits in it, the same problem with a water flooded tank and fuel system but... it made it to both engines then on land it stayed, the engines were pulled n the rest went to scrap. Both of those engines were fixed and are still paired together in a rescue tug for the breakdowns around the lake to this day. Great video 👍

@littlesquirtthefireengine5478

Жыл бұрын

Wow Fox Lake is about 3 feet deep ;) , I'm surprised that thing wasn't permanently run aground

I used to live at a marina that had an old German WW2 era tug boat built in 1939 that would sink a couple times a year. The would get it up, and pull the water out of the fuel tank and oil reservoir, and it would start right up.

Good old 6-71s. When I was in the Navy I ran landing craft with twin 6-71s. We also had OMB's and they ran slant 6-71s. And we ran Box-Ls. The Sea Scouts in CA had a few. The Box-L's ran a 6-110 main and two 2-71 motor generator sets. All of them were good engines.

Sound of the v71 12 and 16 cylinders is also amazing

@scottcupp8129

4 жыл бұрын

My uncle had a 68 Peterbilt with a 12V71. Yeah they sound awesome He also owns a 16v192 gen set.that v192 is a monster!!

@GnonplussedGnome

3 жыл бұрын

Worked in Offshore oilfield on a job one time for two weeks an we had a big crewboat that was glued to us the whole time, it had a pair of 16V-71's in it, we worked on one platform and worked on another building a 200' tall microwave tower.

I appreciate the full length, long format videos. Thank you.

Loving these long format videos. Well and all your videos. Keep em coming!

Great job, love the 671 sound

I installed a Pair of 6-71s in a 10936 65 Foot British Power boats Motor Torpedo Boat back in '82 we rebuilt the Engines and fitted 5 Inch water Jacketed (not Water injected ) Copper exhausts....it sounded incredible but Ear defenders were essential if you were out on the Stern Deck..!!

That is some serious power in that old twin screw, it will be a nice toy once the work is finished. Nice job on the injector, this will be a very awesome ICW cruiser.

@jameylane9196

4 жыл бұрын

LOL

This boat is my favorite because this diesel sounds evil

Marine diesels sound so good!

Really enjoy the videos, thanks for sharing!

@kenyettalancaster2180

3 жыл бұрын

Impossible

That exhaust though! I’ve never heard a throatier 6-71. I can’t wait to hear this thing roar.

One of the highlights of my wrench turning days was rebuilding twin 671's for an oil rig mud pump. One was left hand rotation the was right hand.

@andrewking9761

4 жыл бұрын

Sounds like two Siamese 6-71s connected to a common gearbox like they had in the tanks in WW2.

I know boats aren't your thing but that was interesting...I would have liked to see (and heard) that boat get under way! That deep Detroit rumble is just plain cool! Thanx for the videos...you do a good job with them...very entertaining and quite educational to watch. ;)

Interesting video. I’m a bus guy (DD 8V92T) that just had the engine totally rebuild out of frame. I love the sound of a big 2 stroke. It always gets attention at RV parks, especially in the morning when people need to be awakened. 🤣

@poche660

4 жыл бұрын

very funny

Say man thanks for the update dude that's where I know the two strokes from is the boat world peace and blessings

awesome story... I love the addition of new stuff (boats) not being the same ol' Shit is nice, Thanks Brother

Shoutout from TAT Express out of Hutchins, TX

Thanks for the post. I learned a lot!

Those two sound soo good!

I sure do love your videos man , I wish I had your talent .

That boat sounds amazing.

I repair starter motors and love that sort of solenoid contact. Easy to clean up and get to. Some of the new lorry Bosch solenoids use a pyramid shaped contact that burns out after a few turns. They would not admit they made a mistake and carried on using it. Caused no end of warranty problems.

Those engines sound SO sweet.

Better than anything currently on The History Channel!

I wish Pam would get a channel on KZread so we could follow her & the boat.Enjoy your videos, just getting started watching them

You did it dude! Keep it up!!!

Get into boats! This video was awesome!

Didn't think it was possible to get 400+ hp from a 671 regardless of the cooling, amazing.

I love that pirate themed yacht. That's pretty badass.

@246spyder

3 жыл бұрын

Just curious, do you suppose all of that rigging was real?

Very nice to see this video on the boat

Have her send a video of the boat under way , preferably full throttle !!! ( LOVE the sound of that thing ) .

@buenaventuralife

5 жыл бұрын

I am starting the process of getting the fuel cleaned of dirt and water, changing the coolent, replacing the zincs, replacing the impellers, changing the oil, changing the fuel and oil filters, and just getting things adjusted. Once that is done I will do a video of firing up those engines at the dock. It will be a while before she is seaworthy enough to leave the slip and do some figure eights.

@buenaventuralife

4 жыл бұрын

@@Bill23799 Buena Ventura Life is the KZread channel. Coming up will be a powering up the starboard engine. That should be a good time.

@buenaventuralife

4 жыл бұрын

@@Bill23799 kzread.info/dron/4cDzl6wSlfh2n7Zgv13m-g.html

@grandenauto3214

4 жыл бұрын

Not a diesel guy but the sound of the 2 stoke..... sweet

@buenaventuralife

4 жыл бұрын

@@grandenauto3214 I am getting close to doing the start up of the starboard engine. It should be in a couple of weeks. I will let Scott know so he can let all know. You can also subscribe to my channel Buena Ventura Life.

Nice job, I'm a boat guy so great to see a boat. I found you from Stu at Danger marine. You have explained a lot to me I worked in the Viking Yachts boatyard in early 80's and this boat is I think an 'Ocean yachts' and was just down the road. Detroit's were the boat of choice back then ( building 150-200 boats a year!). We used I think 6-71's and 8-71? And 8-92 which I think are all V engines ? The engine boys talked about how they put oversize injectors and turbos on the engines too and some owners would remove these injectors and put even bigger injectors in which voided the warranty!..... these were sport fishing boats and they all wanted to run to the deep water as fast as possible to take the owner fishing ...... Only Viking Yachts are still in business building boats in NJ all the others got shut down by state or taxes. Viking are building up to almost 100' Long believe now with MTU. DIesels I think . Very interesting about the extra HP because they have so much better cooling..... hence why cooling and oil pressure is vital on boat engines as at that continuous hi load you can kill it in seconds if either is low! Great video Cheers Warren

@BusGreaseMonkey

4 жыл бұрын

I like boats too

Beautiful sound.

good video it was fun to watch. keep recording what youre doing!

Great job on the engines very informative great vid thanks!

One thing I love about Detroit diesels other than the sound is their versatility They’ve been used for marine purposes, road transportation, gensets, god knows what else

@countryjoe3551

11 ай бұрын

A lot of the 4-53s and 4-71s found their way into industrial and agricultural equipment.

16:58 sounds like a joyous symphony of WOW!!

I love how people jump in after they haven't been watching for a while when they actually caught one of the videos and then say why are you reposting videos.. CUZ THE MAN IS BUSY..... Besides maybe you didn't get to see all of the individual videos... it takes time to put all of these single videos into one compilation that you can watch from start to finish the job it's kind of a nice thing.

@BusGreaseMonkey

5 жыл бұрын

Thank you.

@michigandon

5 жыл бұрын

He's got me wanting a 4104.

Get 3 bottles of Howe’s fuel treatment add that to the tanks , the Howe’s will clean any water pockets in the fuel system . The old 2 stroke Detroit’s love that stuff and it cleans up the cylinders . After running it a little add a quart of Marvel mystery oil to every 100 gallons of fuel. When that engine was designed and built fuel had sulfur as a lubricant and marvel makes up for the loss of the sulfur in modern diesel fuel.

Love those Detroit’s

Great job on the video👍🏻

Man I'd love me one of those with 2 of those motors in it.. one very cool boat.

Awesome videos. I have the same engine in my barge, This will be very helpful.

You are the detroit diesel guru!☝️👍👏

A fuel water separator is a must for a diesel engine. Keep up the good work

wow brother you put a lot of work in

Detroit's, Pure Music...

a great attitude to make compliants!

there's nothing better than a Detroit diesel engine sound :-)

love that pirate looking boat lol. and this one youve got some work to do, but ive seen what you can do with buses, so i dont think youll have any trouble here

From Bus G.M. to Boat G.M. Pretty Cool 😎 !

That would be a cool boat to fix up. Looks like a good wash and roll some paint on there it would look pretty good .

2-twin 671s (2 screws), in the 40 Boat series; Coast Guard, in service appx 1950s to about 80, some still in use restored and private service Love the 71 Series also were common in semis and construction equip, stationary power, etc.. Was a "Sea Tractor"

You have rain is just about every video that i have watched of yours.

love GMS top motors in anything great video

Nice and clean.

This is a tale of a castaway here for long long time they have to make the best of things,

Awesome job!

What a glorious noise those engines make.l!!

In WW2, 2 x 6/71 engines were installed in the M10 tank destroyer and the 4,000 Shermans built for the USSR under lend lease. Soviet commanders secretly thought the GM powered Sherman was better than the T-34.

Man that sounds good!