1863 donar for 1872

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cwcub
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1863 donar for 1872

Post by cwcub »

Would an 1863 be a good donar for an engine swap into the 1872. Found one with 600 hrs fully functional $550. Seems like the ticket to me but I'm no expert
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BigMike
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Re: 1863 donar for 1872

Post by BigMike »

1863 is a v twin, 1872 is an opposed twin.

cwcub
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Re: 1863 donar for 1872

Post by cwcub »

That's what I want to do is get the OHV in the tired 1872. Was wondering about the pto/ shaft size on the ch18. Is it the same size pto if not will the pto from the m18 fit the ch18
Thanks for the reply bigmike.
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9803412
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Re: 1863 donar for 1872

Post by 9803412 »

Easy swap, get a drive shaft from a 2084 or 2284, Call Weaver for the shaft. You should be able to reuse your PTO from the Mag. Use the motor plate from the 1863, it will be a bolt in swap. Remove the throttle stop screw on the carb and you'll pick up about 2 HP. Jeff in PA makes pump adapters so that you can bolt the drive shaft to the pump.

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dag1450
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Re: 1863 donar for 1872

Post by dag1450 »

Cory....whats wrong with the mag and how many hours on that? While i have never done the swap in question and it dont sound very hard...i just hate to see stuff like this go on if there may b other options. My main point being, I think even a lower hour "aftermarket" engine devalues your machine. If the mag is not toast....valve work is pretty easy, seals r cheap, new breather. IDK....just a thought.
Give us some pictures....it might change my mind..... :lol:
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

cwcub
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Re: 1863 donar for 1872

Post by cwcub »

The1872 is approaching 1200hrs. I plan on keeping it long term mainly mowing with the 60 inch deck. I know a rebuild or repower is inevitable. the price of the 1863 is about a third of a repower or rebuild from what I've seen. I like the idea of a OHV in the 1872 versus rebuilding the m18. I can do a engine swap but I am no engine rebuilder. I was considering swapping in the transaxle as well and just having the 1873 driveline lengthened or is that a bad idea
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Tom Scott
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Re: 1863 donar for 1872

Post by Tom Scott »

The Super (1872) is geared differently than the regular GT (1863) due to the difference in tire size. Also, the hydro trans from the regular GT cannot be mated to the Super rear due to this gearing difference. You could theoretically swap the entire hydro and rear into the Super, but then you would have a taller gear ratio than was intended for the Super and put more stress on the hydro. Also, the 1863 should have had the Hydro-Gear BDU-21 which is not as robust as the 15 series hyrdo that is in the 1872.

The short answer: No, keep the 1872 hydro and rear as is.

I understand the "donor" engine logic, but just a shame to trash a nice Cyclops GT just for the engine. But that's just me... If you buy the donor, its your business what you do with it.
1872, 46", 50C decks, Haban dozer blade, 450 snow blower
2182-1, Kwik-Way Loader, 3-pt & rear pto, 442 tiller
2182-2, 54" deck, 551 snow blower
Past tractors:  1541, 2135
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cwcub
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Re: 1863 donar for 1872

Post by cwcub »

I figured there was more to the rear than I was aware of thanks for steering me straight on that. I like the tin on the 1872 versus the plastic cyclops. If I have to sacrifice a cyclops to preserve the 1872 I'm ok with that. Best of both worlds. The 1863 wouldn't go to waste. I would recycle parts to some other hobbyist. I understand what your saying about tearing good tractor apart but $1600-2000 for a repower is not really an option for my budget
Thanks for the heip
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spudder
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Re: 1863 donar for 1872

Post by spudder »

The Kohler Command V twin swap is the way to go. Go visit Only Cub Cadets website. Do a search and you can find several threads on the swap. You need to center drill and thread the input shaft on the hydro pump. This keeps the CV joint flange in place.
Check out the Kohler Command swap threads for all the information.

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Tom Scott
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Re: 1863 donar for 1872

Post by Tom Scott »

Nothing wrong with doing the swap or rebuilding, but be realistic about the money. The donor engine is $550, new driveshaft at least $150 - $200 (maybe more if you can't wait to find a good deal...), and you will likely find you need some new gaskets for the donor, or a carb kit or some combination of things that costs at least $100. Drilling the existing pump for the Cyclops driveline flange can be a little tricky with the hardened steel input shaft. If you mess that up, you are now buying a new hydro for at least $300, probably more.

I'm not trying to be discouraging. The swap most likely is cheaper, but probably not less than half of a rebuilt Magnum. And remember, when you're done, you've just installed an engine that is used with an unknown amount of life left. If it has been well maintained, based on hours you can probably consider it halfway through it's service life. And yes, considering all this, it still might be the right decision for you, but I am just trying to compare apples to apples. It is less money, but you don't end up with a fresh start like with a properly rebuilt engine.

Let us know how you do, and pictures are always good!
:beer:
1872, 46", 50C decks, Haban dozer blade, 450 snow blower
2182-1, Kwik-Way Loader, 3-pt & rear pto, 442 tiller
2182-2, 54" deck, 551 snow blower
Past tractors:  1541, 2135
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dag1450
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Re: 1863 donar for 1872

Post by dag1450 »

I built a mag 20 over the last year or so. I did everything except the crank. Mine showed almost no wear but did install new bearings. With new starter, fuel pump and maybe a few other things. I think I'm at $1100. Now...That was with me doing the assembly. I do have light machanic skill and was a big job.
I'm not saying one way or the other.....Just wanted to get this in the thread for you or others reading. Keep us posted!
127, 1650, 1572, 1872, 2072 . A mower, blower and blade for each.

cwcub
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Re: 1863 donar for 1872

Post by cwcub »

Well after all that the 1863 went by by before I could get off work to make the 6 hr round trip. So I will continue to look for a good donar, repower or rebuild. Lots of food for thought here. Thanks for all the good info. Hopefully the m18 stays together long enough for me to get it figured out. I don't know anybody in my area doing rebuilds or machine work on these engines. Thanks again
CW
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