Removing the Detroit Diesel from the steel trawler

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In this video I disconnect the Detroit Diesel 4-71 and lift it out of the boat. This will give me excellent access to the hull below, the prop shaft and the engine itself to service it.
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[@jimnickles2347]

That Mysterious Canister is almost certainly a Racor fuel seperator being used as a Catch-Can for the AIRBOX DRAIN. 2-Stroke Detroits have Drains coming off the Firedeck/airbox inside the block, to drain off the oil splashed out of the cylinder liner ports. On a Motor Vehicle, they are allowed to just drip down on the ground, except in California. You Check the Fill Level in the Catch-Can every few days, and Drain it into a small can or bottle, and just Pour It Back Into the Engine. Or, if you do Oil Analysis, very EASY to get your Samples...Its' Purpose is to keep oil out of your Bilges. Hey, while you have the engine out, Check the Seals on the Emergency Shut-Off Trapdoor in the top of the Blower, or maybe the air intake box. It looks like a Trapdoor that can fall down over the Blower opening and Shut Off Air from coming in. This is a VERY IMPORTANT Safety Piece on ALL 2-stroke Detroits, its to prevent or stop an Engine Runaway. The seal around the edge of the door MUST be in Good Condition, Air-Tight, for it to Work. Also Check the metal Mating surface, make sure it is Clean and Flat, for a Good Seal. I didn't see it in the vid, check and make sure some Dumb-ass has not Removed it. This is the ONLY WAY to shut down a Runaway Two-Stroke Detroit! If you can't put a Load on the engine big enough to Stall It, the ONLY Other way to shut it down is to Shut Off it's AIR. If it runs away, it WILL Suck the oil out of the oilpan, and Run on THAT til it Blows.

[@hema-chan672]

I'm only really interested in sailboats, but I accidentally tripped across your videos and now watch them with breakfast. There's something comfy about a dry sarcastic Aussie fixing boats.

[@paulstinson7505]

I run my own business, but even still I cannot just simply do do whatever I want whenever I want, other people will think I'm being lazy. So today I've hidden in my room, locked the door, and pretended I'm writing letters when In fact I'm watching you take an engine out of a boat........Love it

[@goldplug]

"Oh look, it's an Oyster!?" and "I am definitely getting too old for this." 8 minutes in and 2 awesome quotes! Keep up the great work!

[@stamrly418]

A man with a big heart and the power to tackle anything. Murphy law “if it is going to drop or fall it will to the most difficult place” and it did. Once the engine is out you can get it back....keep it up your doing good. Your also showing the rest of us the hiccups and many of work rounds that are needed to move any job forward. It never goes as the book says....you show the truth.....amacf

[@StonyRC]

Your work ethic and diagnostic approach are second to NONE. Excellent work, excellent video production and highly educational narrative. No wonder so many viewers are riveted!

[@davidwoods4366]

Finally up to date (just watched everything back to back from your first video).After 45 years at sea on "steel" boats you are doing a sterling job.

[@JoshuaLee-xh3gb]

Mad max called he wants his crane back

[@MitzvosGolem1]

pulled 2 8v71 out of a 53ft Hatteras. Made rail road tracks to stern. Pulled off with boom truck.

[@001lostagain]

I'm not into boats but glad I found this rebuild, seen the last few and they where good. Thanks for the Upload.

[@MegaBait1616]

This is the best way to rebuild a boat. Gut it, clean it, fix it and reinstall everything. Thumbs up.

[@PittwaterMowing]

Thanks for taking us along Stu. I was getting flashbacks to when I was mechanic watching this vid. Your making great progress

[@monjury]

That crane was quite the contraption! I’m loving this series. All the best.

[@richardbedard1245]

I was amazed when I saw you use the camera to "see"how things were when you took it apart. I use that method on all new projects. The work you are doing on the 4-71 is bringing back some old memories of the 6-71's I once worked on. These engines had over speed trips that shut the engine down if it got out of hand. They were generator sets.

[@kefa1975]

I have no intention of ever owning a boat but I could watch you all day. You should be on TV!!

[@Scott-by9ks]

When I was in the Army I learned a trick to see things that are in tight spaces. We used the camera on our cell phones to take pictures or videos to see things in hard to reach places like your mystery belt.

[@xx1590]

Of all the boat build/makeover projects on here yours looks like the one that will require the most patients by the time you are done.

[@TheAfterWorkGarage]

Excellent video Stu! I felt for you getting those bolts undone - I have several times told people myself that half of working on engines is putting yourself in uncomfortable positions while undoing intake manifold bolts 1/16th of a turn at a time with coolant dripping on your face. But the reward in the end is addictive!

[@chrisrainville6324]

Stu ,that job has got to be a lot more work than you anticipated!!!! Holy shit!

[@dalejohnson9342]

Having worked on many 71 series Detroit's I think you did a pretty good job with it. The fittings on the water inlet are for zinks to protect the engine from corrosion inside. Someone has changed the alternator to a 12 volt one. I would recommend that you go back to a 24 system as it will give you better battery reserves and also do the same with the started as it will start the motor much easier. The external pump that you had a belt just slipping on is probably a wash-down system with that valve that was on there. I would re-do that system as it will help with cleaning the boat and also protect the boat from other issues. The step-down on the intake is not supposed to be there and you need to fix that. The intake silencer with its four bolts should be replaced along with the air screen that was plugged up. The bolt that came out of the exhaust needs to be replaced and a good measure would be to replace all of those studs. The fuel return should be teed and hoses go to each of the tanks to provide better return and reduce the possibility of flooding one tank.