Yanmar YM186 Compact Utility Tractor – Specifications & Overview
Overview
The Yanmar YM186 is a compact utility tractor manufactured from 1980 to 1986, positioned as a technologically advanced model within the YM series. With an 18 hp diesel engine, a 9-speed transmission with three-speed power shift, and optional 4WD, the YM186 offered excellent versatility for small farms, orchards, and municipal work.
Developed by Yanmar, the YM186 is especially valued in overseas markets for its live PTO, strong hydraulic performance, and compatibility with a wide range of attachments.
Engine
The YM186 uses a reliable Yanmar 3-cylinder diesel engine that balances power, efficiency, and long service life.
| Item | Specification |
|---|---|
| Engine manufacturer | Yanmar |
| Engine type | Diesel |
| Displacement | 0.9 L |
| Cylinders | 3 |
| Gross engine power | 18 hp (13.4 kW) |
| PTO power (claimed) | 16 hp (11.9 kW) |
| Cooling system | Water-cooled |
| Fuel system | Mechanical injection |
Transmission
A key feature of the YM186 is its advanced transmission for the era.
| Item | Specification |
|---|---|
| Transmission type | Gear with power shift |
| Speeds | 9-speed (3-speed power shift) |
| Drive options | 2WD / 4WD |
| Differential lock | Mechanical rear |
| Steering | Manual (power optional) |
| Brakes | Mechanical dry shoe |
Power & PTO
The YM186 is equipped with both rear and front PTO options, enhancing its versatility.
Rear PTO
| Item | Specification |
|---|---|
| PTO type | Live |
| PTO speeds | 540 / 1000 rpm |
| PTO shaft size | 1.375 in |
| Engine RPM | 540 @ 2430 rpm / 1000 @ 2412 rpm |
| Clutch | Overrunning dry disc |
Front PTO
| Item | Specification |
|---|---|
| PTO type | Independent |
| Clutch | Electro-magnetic |
| PTO output | Pulley type |
Capacity
| Item | Specification |
|---|---|
| Fuel tank | 4.2 gal (15.9 L) |
| Hydraulic system | 2.1 gal (7.9 L) |
Hydraulics
| Item | Specification |
|---|---|
| Hydraulic type | Open center |
| System capacity | 2.1 gal (7.9 L) |
| Operating pressure | 1,991 psi (137.3 bar) |
| Total flow | 4.8 gpm (18.2 L/min) |
Hitch & Lifting Capacity
| Item | Specification |
|---|---|
| Hitch type | Rear, Category I |
| Lift capacity (at ends) | 661 lbs (299 kg) |
| Lift capacity (at 24 in / 610 mm) | 529 lbs (239 kg) |
Dimensions & Tires
| Item | Specification |
|---|---|
| Operating weight | 1,433–1,539 lbs |
| Front tires | 5.00-12 |
| Rear tires | 9.5-16 |
Variants
| Model | Drive |
|---|---|
| YM186 | 2WD |
| YM186D | 4WD |
The YM186D (4WD) is particularly popular in wet fields and uneven terrain.
Attachments
The YM186 supports multiple attachments, making it suitable for year-round work.
| Attachment | Availability |
|---|---|
| Mid-mount mower deck | 60 in |
| Front-end loader | Yes |
Electrical System
| Item | Specification |
|---|---|
| Ground | Negative |
| Charging system | Alternator |
| Charging output | 15 amps |
| Battery voltage | 12 V |
| Battery capacity | 45 Ah |
Operator Station
-
Open operator station
-
ROPS optional
-
Clear visibility and simple control layout
Photos
Due to the age of the model, official catalog photos of the Yanmar YM186 are limited.
Actual appearance and condition vary depending on refurbishment and usage history.
Why the Yanmar YM186 Remains Popular
-
Advanced power-shift transmission for its class
-
Live PTO and strong hydraulic performance
-
Proven Japanese diesel reliability
-
Excellent compatibility with farming and mowing attachments
EVERY FARM TRACTOR has been exporting Japanese used tractors since 2006, delivering trusted machines like the YM186 to customers in over 100 countries.
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