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Yanmar YM186

The Yanmar YM186 is a tractor produced by Yanmar. It is equipped with a 53.5 ci 0.9 L engine. The listed engine power is Diesel (gross): 18 hp / 13.4 kW. Transmission: 9 forward and 3 reverse. Operating weight: 1433 to 1539 pounds.

Engine Power
Diesel (gross): 18 hp / 13.4 kW
Fuel & Capacities
4.2 gal 15.9 L
Transmission
9 forward and 3 reverse
Operating Weight
1433 to 1539 pounds

Overview

Yanmar YM186 tractor photo
1980 - 1986 Compact Utility tractor
Production
Manufacturer
Yanmar
Compact Utility tractor
Original price was $7,400 in 1986
Variants
YM186
2WD
YM186D
4WD
Yanmar YM186 Engine
Yanmar 0.9L 3-cyl diesel
Engine details ...
Yanmar YM186 Transmission
9-speed three-speed power shift
Transmission details ...
Yanmar YM186 Power
Engine (gross)
18 hp 13.4 kW
PTO (claimed)
16 hp 11.9 kW
Mechanical
Two- or four-wheel drive
Differential lock
mechanical rear
Steering
manual
power OptOptional
Mechanical dry shoe brakes
Open operator station. ROPS optional.
Capacity
Fuel
4.2 gal 15.9 L
Hydraulic system
2.1 gal 7.9 L
Hydraulics
Type
open center
Capacity
2.1 gal 7.9 L
Pressure
1991 psi 137.3 bar
Total flow
4.8 gpm 18.2 lpm
Tractor hitch
Rear Type
I
Rear lift (at ends)
661 lbs 299 kg
Rear lift (at 24"/610mm)
529 lbs 239 kg
Power Take-off (PTO)
Rear PTO
live
Clutch
overrunning dry disc
Rear PTO Type
540/1000 (1.375)
Engine RPM
540@2430
1000@2412
Front PTO
independent
Clutch
electro-magnetic
Front PTO Type
pulley
Dimensions & Tires
Weight
1433 to 1539 pounds
Front tire
5.00-12
Rear tire
9.5-16
Full dimensions and tires ...
Electrical
Ground
negative
Charging system
alternator
Charging amps
15
Battery volts
12
Battery AH
45
References
YM186 references literature
YFL Series Loaders published in 1987, by Yanmar
Sales Promotion Manual published in 1979, by Yanmar*
YM186 - YM186D published by Yanmar
YM186 / YM186D published in 1983, by Yanmar
Operation Manual Model YM186 - YM186D (41812011080) published in 1980
*Publication contains known errors.

Engine

Engine Detail — 53.5 ci / 0.9 L Diesel

Manufacturer
Yanmar 3T72HA
Fuel Type
Diesel
Configuration
3-cylinder, liquid-cooled
Displacement
53.5 ci 0.9 L
Bore/Stroke
2.83x2.83 inches 72 x 72 mm
Power (gross)
18 hp 13.4 kW
Pre-heating
thermostart
Compression
23:1
Rated RPM
2600
Firing order
1-3-2
Starter volts
12
Oil capacity
3.4 qts 3.2 L
Coolant capacity
4.4 qts 4.2 L
Intake valve clearance
0.008 inches 0.203 mm
Exhaust valve clearance
0.008 inches 0.203 mm

Transmission

Transmission — 9 forward and 3 reverse three-speed power shift

Type
three-speed power shift
Gears
9 forward and 3 reverse
Oil capacity
8.4 qts 7.9 L
Three speeds, plus reverse, with three ranges.
YM186 three-speed power shift speeds

Dimensions

Yanmar YM186 Tires
2WD Ag front
5.00-12
4WD Ag front
6-12
Ag rear
9.5-16
Dimensions
Length
98.3 inches 249 cm
Width
42.9 inches 108 cm
Height (steering wheel)
53.1 inches 134 cm
Height (exhaust)
50.0 inches 127 cm
2WD Shipping weight
1433 lbs 650 kg
4WD Shipping weight
1539 lbs 698 kg
Ground clearance
10.4 inches 26 cm

Attachments

Attachment overview
60" mid-mount mower deck
Front-end loader
60" Mower deck
Type
mid-mount Yanmar YQM-60A
3-blade with hydraulic power lift
Cutting width
60 inches 152 cm

Photos

Yanmar YM186D compact utility tractor.

Yanmar YM186D compact utility tractor.

Recommended Implements & Sizing Guide

Engineering recommendations for Yanmar YM186 based on its 18 HP power envelope and ASAE agricultural standards.

Implement & OperationRecommended SizeWorkload RatingEngineering Notes
Moldboard PlowPrimary Tillage
1 to 2 Bottom (12")1 - 2 铧 (30 cm)Light DutyIdeal for garden plots and light sandy soil.
Rotary Cutter / MowerMowing & Clearing
4 ft (48 in)1.2 mLight DutyPasture clipping and light brush under 1" diameter.
Rotary TillerSeedbed Prep
42 to 48 in105 - 120 cmLight DutyCovers compact tractor tire width.
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for Yanmar YM186.

Estimated Continuous Field Runtime: 4.5 hrs

Approximately 4.5 hours of continuous field operation at ~75% rated power on a full tank (4.2 gal / 15.9 L).

Estimated 75% Load Fuel Burn~0.9 gal/hr (3.5 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours

Yanmar YM186 Specification Unit Converter

Convert power, fluid capacities, and operating weights between metric and imperial standards for Yanmar YM186.

Converted Equivalents:

Horsepower (HP)18 hp
Kilowatts (kW)13.4 kW
Metric Horsepower (PS / CV)18.2 PS

Direct Competitor Comparison

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