For almost thirty years โ from 1978 to 2007 โ John Deere’s smallest tractors weren’t built in Waterloo or Augusta. They were built in Japan by Yanmar, shipped over in green paint, and sold through Deere dealers as the 650, 750, 850, 950, and 1050, then the 70 Series, and finally the 790. Nearly half a century after the first ones landed, these tractors are among the most searched used compacts in Canada โ because they predate every emissions system ever bolted to a diesel, because their parts still flow through Deere dealers, and because they simply refuse to die.
This guide compares all seven of the most-searched Yanmar-era John Deere models in one place: independently tested horsepower where Nebraska Tractor Test Laboratory data exists, the 1984 serial-number watershed that splits the used market, the shared engine architecture that makes these tractors easier to own than their age suggests, and honest Canadian price ranges for 2026. Every model here has a full standalone review on Aglist โ this page is the map.
Why Deere Went to Yanmar โ and Why It Still Matters
By the mid-1970s, small diesel tractors from Japan were quietly taking over North American acreages, and John Deere had nothing to sell against them. Rather than spend years developing its own, Deere partnered with Yanmar in 1977 and launched the 850 and 950 in 1978 โ the first compact utility tractors John Deere ever offered. The 1050 followed in 1980, the smaller 650 and 750 in 1981. A second generation (the 70 Compact Series, including the 770) ran 1989โ1998, and the 790 carried the simple gear-drive formula all the way to 2007.
Why it matters to a buyer today: these are honest mechanical tractors from before electronics and aftertreatment. No DPF, no regeneration cycles, no DEF, no ECU โ Canadian sellers literally headline listings with “pre-emission engine,” and the market pays a premium for it. Combined with Yanmar’s durability record and a parts ecosystem that never dried up, the Yanmar Deeres occupy a unique slot in 2026: working tractors at hobby-tractor prices.
Every Model at a Glance โ The Master Table
Ordered by PTO power โ the number that actually determines what implements a tractor can run. “NTT” marks figures independently measured at the Nebraska Tractor Test Laboratory; the rest are manufacturer-claimed.
| Model | Years | Engine | Gross HP | PTO HP | Live PTO | Weight (approx.) | Typical CAD (2026) |
|---|---|---|---|---|---|---|---|
| John Deere 650 | 1981โ1989 | Yanmar 2T80UJ, 0.9 L, 2-cyl | 17 | 14.5 (claimed) | No | 1,530โ1,640 lb | $5,500โ$13,000 |
| John Deere 750 | 1981โ1989 | Yanmar 3T80, 1.3 L | 20 | 18.54 (NTT 1504) | No | 1,700โ2,000 lb | $6,500โ$14,000 |
| John Deere 770 | 1989โ1998 | Yanmar 3TN82, 1.4 L DI | 23 | 20 (claimed) | Optional | 1,930โ2,105 lb | $8,500โ$17,000 |
| John Deere 850 | 1978โ1989 | Yanmar 3T80-J, 1.3 L | 25 | 22.27 (NTT 1280) | From 1984, s/n 16001 | 2,350โ2,400 lb | $7,000โ$15,000 |
| John Deere 790 | 2000โ2007 | Yanmar 1.5 L / 1.3 L DI by year | 30 | 26 (claimed) | Standard on MFWD | 1,930โ2,105 lb | $9,000โ$20,000+ |
| John Deere 950 | 1978โ1989 | Yanmar 3T90-J, 1.7 L DI | 31 | 27 (NTT 1281) | From 1984, s/n 20001 | ~2,700 lb | $8,000โ$16,000 |
| John Deere 1050 | 1980โ1989 | Yanmar 3T90T, 1.7 L turbo | 37 | 33.41 (NTT 1327) | From 1984, s/n 11001 | ~3,400 lb (4WD) | $9,500โ$18,000 |
Three things the table can’t fully show: the 770 and 790 share near-identical chassis weights because the 790 is essentially the third act of the same design; the 850 outweighs the 790 despite less power because the x50 generation carried more iron per horse; and the 1050 is the only turbocharged tractor Deere’s compact line ever had until modern times.
One Family, Three Engine Architectures
The whole line is built on a handful of modular Yanmar designs โ which is exactly why parts knowledge transfers between models and why the aftermarket never abandoned them.
The 80-mm family (650, 750, 850). One cylinder design โ 80 mm bore, 85 mm stroke โ in two counts: two cylinders make the 650’s 0.9 L, three make the 1.3 L shared by the 750 and 850. And here’s the honest disclosure most spec sites never state plainly: the 750 and 850 use the same basic engine at different ratings โ 20 HP at 2,400 rpm versus 25 HP at 2,600 rpm. When you pay the 850 premium, you’re buying the higher tune, the heavier frame, and (from 1984) the live PTO โ not a different engine.
The 90-mm square family (950, 1050). A larger direct-injection 1.7 L with 90 ร 90 mm dimensions. The 950 runs it naturally aspirated at 31 HP; the 1050 adds a turbocharger for 37 HP, a 10-inch clutch, and a differential lock. Same block, same honest disclosure: the 1050’s premium buys the turbo and the hardware around it. One family caution travels with this engine: the 950 has a documented reputation for cylinder-head cracking when overheated, so cooling-system condition is inspection item one on both models.
The TN-series (770, late 790). The 770 introduced Yanmar’s more modern 82-mm direct-injection family (1.4 L, with a factory intake pre-heater for better cold starts), and 2003โ2007 790s use the same architecture in 1.3 L form โ while 2000โ2002 790s run a related 1.5 L. The practical upshot: the 770 and 790 are mechanical cousins, and the 770 typically sells for CAD $2,000โ$4,000 less for very similar work.
The 1984 Watershed: Live PTO and the Serial Numbers That Move Prices
The single most important thing a used buyer can learn about the x50 generation fits in one sentence: in 1984, the 850, 950, and 1050 gained a continuous-live PTO via a two-stage clutch, and John Deere’s own post-1984 operator’s manual (OM-RW19870) defines exactly where โ 850 from serial number 16001, 950 from 20001, 1050 from 11001.
Before those serials, the PTO is transmission-driven: clutch in, and the implement stops with the wheels. After them, half-pedal stops ground travel while the implement keeps turning โ a genuine daily-life difference for mowing and snowblowing that the market prices accordingly. The 650 and 750 never received the change; the 770 offered live PTO as an option; the 790 made it standard on MFWD units.
One safety note that applies to every transmission-PTO tractor in this family: a heavy spinning implement like a rotary cutter will drive the tractor forward through the PTO when you clutch. The fix costs under CAD $100 โ an overrunning clutch coupler on the PTO shaft โ and it belongs on every 650, 750, pre-1984 x50, and unoptioned 770 before the first pass with a cutter.
What Nebraska Actually Measured
Four of the seven models were independently tested at the Nebraska Tractor Test Laboratory โ the University of Nebraska program that has kept manufacturers honest since 1920 โ and the numbers on their Aglist pages come from those tests, not brochures: the 850 (Test 1280, 1978: 22.27 PTO HP, 18.9 drawbar), the 950 (Test 1281, 1978: 27 PTO HP), the 1050 (Test 1327, 1979: 33.41 PTO HP, 27.25 drawbar, 3,466 lb maximum pull on 2.2 gal/hr), and the 750 (Test 1504, 1983: 18.54 PTO HP, 15.30 drawbar). The 650, 770, and 790 carry manufacturer-claimed figures, and their Aglist pages say so explicitly โ because knowing which numbers were measured and which were promised is part of buying a forty-year-old tractor well.
Which One Should You Buy? Match the Tractor to the Work
Turf, gardens, and the smallest footprint โ 650. At 43 inches wide and about 1,530 lb, the John Deere 650 fits where nothing else with a three-point hitch does, and its two-cylinder 0.9 L sips fuel. It mows with a 60-in. belly deck and blows snow with the Model 359 โ just don’t ask it to be a loader tractor.
Tight-space all-rounder on a budget โ 750. The John Deere 750 runs a real 60-in. deck, the JD 67 loader, and 4-ft implements while staying garden-gate narrow. Nebraska-verified 18.54 PTO horses, lowest cost of entry among the three-cylinders.
The value bridge โ 770. The John Deere 770 is the quiet pick of the whole family: direct injection with a factory pre-heater, a differential lock, optional power steering and live PTO, the JD 70 quick-attach loader โ for thousands less than the 790 it foreshadows. Configuration decides everything; the loaded 4WD units are the prize.
Chores and character โ 850. One of the two tractors that started it all. The John Deere 850 carries loader-worthy weight, Nebraska-tested 22.27 PTO HP, and โ on 1984+ units โ live PTO. On the Prairies, expect to find them wearing Manitoba-built Buhler or Allied loaders, which is its own kind of provenance.
5-ft implements as daily tools โ 950. The John Deere 950 is the family’s implement tractor: 27 tested PTO horses, 28-in. rear rubber, the JD 75 loader. Its one condition: verify the cooling system and overheat history before anything else โ the 3T90’s head reputation is real and preventable.
Real field work โ 1050. The flagship John Deere 1050 runs 6-ft implements and a two-bottom plow on Nebraska-tested 33.41 PTO HP, with the diff lock and 11-gallon tank to use them. The turbo demands oil discipline and an idle-down habit; in exchange you get the smallest genuine field tractor Deere sold in the 1980s.
The newest and simplest path โ 790. The John Deere 790 ends the story with the best daily manners: standard live PTO on MFWD, hydrostatic power steering on 4WD, two decades newer than the originals, typically with the lowest hours. It costs the most โ and holds value best โ for exactly those reasons. Its 40-horse sibling, the 990, serves buyers who need one more implement class.
Buying One in Canada: The Universal Checklist
These tractors surface constantly on AgDealer, MarketBook, and Kijiji, and at farm auctions from Ontario to the Peace Country. Whichever model you’re chasing, the same discipline applies. Decode the configuration before discussing price โ drive type, PTO type (and the 1984 serial break on x50s), steering, loader make and model โ because options move value more than hours on machines this age. Demand an honest cold start: no pre-warming, or proof of a working block heater, which is effectively mandatory equipment in Canada regardless of model. Shift every gear from a dead stop; these boxes are unsynchronized by design, and grinding is a negotiation point, not a quirk. Test both clutch stages on any live-PTO unit. On the 950 and 1050 specifically, make the cooling system inspection item one, and on the 1050 add the turbo’s oil-change story. Finally, weigh condition over hours: a documented 2,500-hour tractor beats a neglected 800-hour one every time in this family, and the pre-emissions premium means clean examples sell fast.
For winter operation setup โ block heaters, fuel, batteries, and open-station survival โ our prairie winter equipment operation guide applies to every tractor on this page.
When New Money Makes More Sense
There’s an honest crossover point. If your work is loader-cycle-intensive, hydrostatic drive pays for itself in time and clutch wear; if you need a warranty, financing, or a cab, the used-Yanmar math weakens. The modern descendants map cleanly: the John Deere 1025R covers the 650/750 slot, the John Deere 2025R and Kubota B2601 the 770 slot, the John Deere 2032R and Kubota L3302 the 950 slot, and the Kubota L3902 the 1050’s power class. Expect three to five times the outlay of a good Yanmar-era unit โ buying, in exchange, Tier 4 aftertreatment you’ll maintain instead of avoid. That trade, more than anything, is why this forty-year-old family still commands real money. Browse all tractors on Aglist for the full picture.
John Deere Yanmar Tractors โ FAQ
Who actually built these John Deere tractors? Yanmar, in Japan, under a partnership John Deere signed in 1977. They were sold, warrantied, and parts-supported as John Deere products โ and Deere dealers still stock parts for them today.
Which Yanmar-era John Deere is the best one to buy? There’s no single answer โ the 770 is the value play, the 850 the character-and-chores pick, the 950 the implement workhorse, the 1050 the field tractor, and the 790 the newest and easiest to live with. Match PTO horsepower to your implements first (the master table above), then hunt configuration.
What does the 1984 serial-number change mean? The 850, 950, and 1050 gained a continuous-live PTO via two-stage clutch โ from serial numbers 16001, 20001, and 11001 respectively, per John Deere’s own operator’s manual. Post-1984 units are meaningfully better for mowing and snowblowing and price accordingly.
Are parts still available in Canada? Engine and driveline parts, yes โ through John Deere dealers and a deep Yanmar aftermarket that includes full overhaul kits. Sheet metal, trim, and model-specific items (especially for the lower-production 1050) take more patience.
Why do these old tractors cost so much in 2026? Three reasons: they predate all diesel emissions equipment (no DPF, no DEF โ sellers advertise it), Yanmar durability means most are still working rather than scrapped, and demand from acreage owners keeps outrunning supply of clean examples.
Which models have independent Nebraska test data? The 750 (Test 1504), 850 (Test 1280), 950 (Test 1281), and 1050 (Test 1327). The 650, 770, and 790 carry manufacturer-claimed figures โ worth knowing when comparing spec sheets.
Are these the same as gray-market Yanmar tractors? Related but not identical. The John Deere versions were official North American products with Deere support, English documentation, and dealer parts. Gray-market Yanmar imports (YM-series and others) share engineering DNA but differ in parts paths and support โ a JD-badged unit is the simpler ownership.
What replaced this family? The 70 Series gave way to the 4000 Twenty compacts in 1998, while the 790 ran until 2007 and was renamed the 3005 for 2008โ2012. Today’s 1, 2, and 3 Family compacts are the direct descendants.
Disclaimer
Specifications on this page are compiled from John Deere technical literature and Nebraska Tractor Test Laboratory reports (Tests 1280, 1281, 1327, and 1504), cross-checked against reference sources; figures marked “claimed” are manufacturer ratings without independent test data. All models covered here are discontinued โ availability is limited to the used market, and price ranges are indicative Canadian figures for 2026 that vary by region, condition, hours, and configuration. Reviews on Aglist are written by real users and moderated for spam โ opinions are personal. Always confirm specifications and condition against the operator’s manual, a serial-number decode, and a physical inspection before committing to any specific machine. See each model’s full Aglist review for detailed specifications, known issues, and inspection guidance.
