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Discussion Starter · #1 ·
This project has been in my head ever since I saw another CCI members finished project last year. I want to pull the Onan out of my 77 446 and transplant a 10hp diesel engine in it. The Onan engine that is in the tractor now is in perfect running condition. It is NOT the OEM engine though. A previous owner swapped in a newer style Onan because the OEM one went south.

http://www.carrollstream.com/10HP_Diese ... s186es.htm

Here is a link to a thread that our member LAKHYD started to first sell an engine (the one that is now in my 220) and to show pics of his install. Great guy that really knows his stuff.

http://www.tractorbynet.com/forums/case ... ngine.html
 

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Discussion Starter · #3 ·
Yes but it looks like I will need to remove the pull start assembly and machine a hub of somesort to mount it.

The kicker will be engine placement. The clutch must be in the same spot as it was with the OEM engine.
 

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I see only 25 c.i.d. and a calculated 15 lb ft of torque ( maybe the formula is different ?? )
I would "think" this to be a retrograde step from a 43 c.i.d./ 16hp /23 lb ft Onan ?
 

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I've been thinking of doing the same thing to the 210 that came to me with part of the K241 missing. A few things that I've noticed that will have to be worked around are: 1. The diesel is about 2 inches taller than the Kohler and I would guess a little taller than the Onan too, so hood clearance will be an issue. 2. The mounting bolt pattern on the diesel oil pan is wider than it is on the Kohler and the crank shaft is offset slightly so a new motor mount set-up will have to engineered. 3. The muffler and fuel tank that come with the diesel make it way to wide to fit under the hood so a different exhaust system will have to be made and a different way of getting fuel to the engine will have to be sorted out. 4. The crank shaft height looks to be fairly close to the Kohler, what differance there is can hopefully be made up for when making the new motor mounts. It would be really nice to be able to use OEM belts. 5. I can't find an overall lenght measuerment from the mounting face of the flywheel so all I can do is hope that there is going to be enough room to have a stub shaft/adapter made and keep the clutch pulley placement the same.

It'll be this fall at the earliest be for I can get the funds together to start the project.

I wonder how much it would cost to have Maplehunter make up decals that say 210D. :cool:

ByCo
 

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Yep, he is the guy who put a 10HP yanmar clone in his 644 and he raves about it...I have communicated with him and he is very helpful. I am going to put one of these in my 444 after my 648 project is done. I plan to only mow with it and will run the mower with hydraulics off the front mounted Tiller/PTO. I say go for it....I know it will work great and save you a ton of fuel! :clap:
 

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Discussion Starter · #9 ·
mikebramel said:
I dont know how you can compare a old, worn out 14HP engine to a new 10HP diesel.

A "perfect" running 16HP Onan down to a 10HP diesel will be a a dissapointment
Please explain further. I'm open to all opinions on this. Good or bad.
 

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I can not claim any experience in this area, but a few things come to mind when reading this thread. I have a 646 and a 448 that are both frequently used. My brother also has a 646 and a 444. Between the two of us, our 400 series tractors are used mostly for snowblowing and mowing. While the 600 series tractors are being used for bucketing and other larger hydraulic attachments. (Wood splitters, tillers, hydracutters, etc.)

Is it fair to say that the majority of 200/400 series tractors regularly use the front PTO, while 600 series do not?

If I had to repower one of my tractors with a non OEM engine, I would be much more comfortable doing it to the 646 like the 644 in the thread that you referenced. My 646 doesn't need the front PTO for how I use it. That simplifies the project significantly.

In my mind, the biggest hurdle for the 400 series would be the front PTO alignment. I am not saying that it is impossible, but definately a serious task that would need to be done well to maintain the use of the belt driven attachments. This is something that I would try to avoid vs. replacing or rebuilding a correct Onan.

I guess what I am trying to say here is, a diesel repower for my 646 would not be out of the question. But, for a 200/400 series I would pass. This project may be a piece of cake for your skill set and available resources, but the average Joe Case owner would have his hands full to do it right. If you decide to go for it, keep us updated, I will definately follow the progress. :thumbup:
 
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