S2E24 Saturn SC1 gets a Kubota D722 Diesel engine swap. Today we fabricate the clutch 

As somebody who's struggled through engine swaps, here's some advice: Remember that when the clutch wears, the pressure place fingers move OUT towards the throwout bearing. When designing your adapter, be sure to make it like 1/8" to 1/4" thicker than the depth required to rest the throwout bearing against the pressure plate fingers with a new clutch. Otherwise, as soon as the clutch breaks in, you may find your clutch slipping just from the static pressure of the fingers against the fully retracted throwout bearing.

It's always a good thing to keep a friendly, tamed CNC machinist on hand, especially when supplied with a decent mug to store his coffee in... :P

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This is such an interesting swap. I hope you’ve planned for a turbo!

Kubota uses German letters to enumerate the number of cylinders a particular engine has. I was told by a Duetz service manager this was because in the early days , Deutz had provided cast blocks / heads for Kubota E = Eines = One Z = Zwei = Two D = Drei = Three V = Vier = Four Also, the last # 2 in the D722 isn't displacement, it is a designation code for stroke ( in this case 68 mm ) so the " advertised approximate displacement " is 720 CC and 719 CC actual .

I'm a mechanic who mainly works with kubota engines only. I've been wanting to do a swap like this just for the sake of seeing how long it will last. In the last 10 years of me being working with these engines, none of them have ever failed given the proper maintenance. Only had to replace 2 due to user/owner error. Love this series :p keep at it

This is one of the best engine swaps I’ve watched. We all know you can slap in a big motor and get power. Swapping for efficiency is super interesting.

Back in the early 80"s a designer put a 17HP 3 cylinder Kubota diesel in a car and got 128mpg (at 35mph I believe). An article was published about it in Mechanix Illustrated magazine. The frame and running gear was from a Triumph Spitfire car and the body was custom fiberglass over foam. Robert Q Riley Enterprises was the guy and he designed a lot of neat vehicles. Unfortunately he was a one-man business and he died a couple of years ago. You can still google his business and find a copy of his website with all the vehicles. I don't believe you can order plans anymore.

The weights of the cars at the end was a wonderful add on! 😁

International Harvester built a truck in the late '60s that used a straight six gas tractor engine. 2400 rpm max, 35 to 40 miles per gallon because of some really tall final gearing. Pull hard all day long.

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Mounting engines to transmission that were never intended to go together is the biggest black box of mystery in my mind but I love thinking about the combinations. It's good you found a machine shop that was willing to work on this. Seems like allot of machine shops aren't interested in doing anything cool like this; I've shopped around.

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It just keeps getting better.. I really love diesel engines. That little Kubota is a beauty.

I wanna see this baby in the car running. With the TURBO.👍👍👍👍

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So this is one of those "dual mass flywheels" I've been hearing about

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We are a small engine repair shop, and a commercial outdoor Power equipment dealership. I extremely familiar with this little "torque monster" and really looking forward to seeing your final results when fully installed ! So glad you are taking the time to pay attention to detail ! It/they can and will make or break your project success ! And, it will be a successful project ! Great job guys, looking forward to seeing your final results ! 🇺🇲

I'll just add a project from Jack McCornack I enjoyed following. He used a Kubota D-1105T and adapted it into a homebuilt Locost 7 (Lotus 7). Your video brought back memories and appreciation of how you both made creating a successful engine adapter look relatively easy. :) Bravo.

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I designed performance clutch kits for a reputable aftermarket manufacturer for 7-years. I approve of the design. Also the flywheel was made in Ningbo and shipped to the US directly. It is top quality.

Your clutch alignment mod made me laugh. :D

There’s an interesting gasoline 3 cylinder Kubota that shares architecture with the diesel 3 cylinders. I serviced a lawn mower once that had the gasoline version, it sounded like a diesel and tan very smoothly

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The weight of 2 flywheels is going to make acceleration more lackluster than it should be. Too bad with all that work that you didn't decrease the rotating mass to closely resemble the Kabota flywheel alone. Some weight reduction could be accomplished via machining away material and/ or lightening holes or even reproducing one out of aluminium. I really like diesel and always believed they should be more utilized in this country to power small cars and pickups. Good luck !

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Glad to see the Kubota finally getting close to really being used for something. No updates this time on your hearing, did that improve at all?

Absolutely love this series - the amount of ingenuity required to do things that were never meant to be done is incredible and you always make it entertaining!

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I love this channel. Very interesting projects in very great detail. Perfect for learning and/or inspiration for diy!

I'm glad you managed to use a proper clutch on this project! Hopefully it will help the overall efficiency of this drivetrain!

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I recall a similar Kubota engine in a lawn tractor....... it was many years ago, but I suspected that engine was similar to what would be used on a mower.... and I guess I wasn't wrong.

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Always an entertaining watch, thank you for going the trouble to film and edit those experiments I wouldn’t dare to even do

my 14 year old grandson, he is interested in all things mechanical. He has enjoyed playing with the lawnmower and weed whacker and using the book as a guide. So far everything still runs, so I guess he's doing OK. I explained to him that not all engines are the same, but the principles still apply, so learn the basics and build from there. He is enjoying learning, and I am enjoying watching him build his confidence and library of knowledge. Nothing beats hands-on experience and instant gratification when you pull the cord and the engine fires up! I think it's the only Christmas gift he got that he is still using.

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Love your Channel, Jimbo!! 🤩🥰

Been waiting for this one!

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Pretty cool to see you are local. I've been keeping up on you're swaps. Good job

I started watching since you were putting that EFI kit on the 420cc big block. This is a brilliant series.

Love your work, Jimbo 👍

Excited to see the next video on this build keep up the great work

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Hell yeah the big D episode! That is some beautiful machining by the shop. Can't wait to see the adapter plate you cook up for mounting the transmission! Great job as always, love watching these projects unfold.

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On the edge of my seat with this one.

Jimbo, please keep making these great videos!

Another great video. Good job guys

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Its also used in marine applications i repowered my 91 catalina 28 with a universal m3-20b witch is based off d722 kubota. I have a extra block and head and some spare parts that u are welcome to if needed. Really cool experiment.

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I'm currently looking at adapting a D722 to a ditch witch 2300. Great video!

for people with limited knowledge of small four stroke engines, however two stokes engines are not covered in as much detail. Ideal for people who want to have a better understanding on how these small engines work. Great for small motor heads who like to take care of their small engines on lawnmowers and other equipment.

I want to see how much power can be squeezed out of this little engine, I’ve thought about swapping one of these into a vw beetle

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That's whole heap of adaptation! I love seeing it come together.

This channel is a little slice of home for me, everything you do from the methodology to "crazy" goofy ideas, it reminds me of my late grandpa. Always finding something to work on in his shop. Hope your allergies get better and thanks for the awesome content!!

Great video as always. Thank you.

That was some mad machining. This is one of your best projects yet 😂 I always love these funky swaps. Really cool stuff, can't wait to see it finished.

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As always, love the content and hanging on the edge of my seat until the next episode comes out! 🍺 I can't wait to hear that puppy run in your car and see how the MPGs improve. Keep up the great work and of course I love the dry sense of humor! 🙂

I was watching the video and an ad came up for something called Markforged. It's a metal 3D printer that you can make engine parts out of! You should look into this!

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Glad to see that the Saturn wagon is getting some use.

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Maybe something to consider is two flywheels adds more rotation mass making it harder for the engine to rev up. And diesels don’t work like gas, you let off the throttle it’s going to take longer for the engine to return to idle. Cool idea tho to put a little diesel engine in a passenger car, keep up the good work.

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Very cool builds , info and videos. I’ve watched several of your vids and I enjoy the content .

Absolutely hooked. As with all of your videos

Once turbocharged and tuned it should make around 50HP. Reaching probably 80+mpg

Really enjoy your videos. Thank you.

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One of the coolest swaps

Hey Mr. Robot! I’ve been wanting to this exact thing for about five years, but I’m in no position to, so thank you for making my imagination a reality!

I'm loving this dude..... MORE!!!

I work some with Diesel engines at my current job and I have learned a lot - greatly enhancing my abilities in the maintenance of our bus fleet. Hoping this knowledge will be the start of bigger and better things.

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Like watching your videos about your little shop and your car’s thought your Honda was neat and you are moving ahead with the Saturn hope your hearing improves.