MARINE / DIESEL ENGINES / 3YM20

3YM20Max. Output at Crankshaft 22 mhp / 3,800 rpm

Total Displacement 0.854 L

Configuration 4-stroke cycle

Cylinders 3

Engine Weight 266 lbs

Quick Specs

80A Alternator Once an option, and now standard, it helps deliver maximum power for the cruising boater’s needs.

Saildrive Option A popular feature for those interested in reducing drag and increasing performance.

Convenient Service Points Makes it easy to perform routine maintenance or handle unexpected repairs.

Belt safety guard provides complete protection from belts and moving components

Seawater drain valves make it easy to winterize or drain water for maintenance operations

High-quality two-part urethane paint protects surfaces from rust

Legendary Reliability. Compact. Light Weight.Yanmar engines are designed for high performance and maximum engine life.

Tested under the most extreme conditions, you can always count on them to deliver

the power you need day in and day out, year after year. It’s simply the best power

package available for new vessels and re-power applications.

Configuration 4-stroke, 3 cylinder, vertical, water cooled diesel engine

Maximum output at crankshaft 21 mhp (15.3 kW) / 3600 rpm

Continuous rating output at crankshaft 20 mhp (14.7 kW) / 3489 rpm

Displacement 0.854 L (52.1 cu in)

Bore x stroke 2.8 in x 2.9 in (70 mm x 74 mm)

Aspiration Natural aspiration

Alternator 12 V - 80 A

Cooling system Fresh water cooling with heat exchanger

Direction of rotation (crankshaft) Counter clockwise viewed from stern

Dry weight without gear 266 Lbs (120 Kg)

Environmental Certification Meets the comprehensive emissions regulations in EU and US

Engine mounting Flexible type isolators

NOTE: Fuel condition: Density at 15°C = 0.84 g/cm 3; 1kW = 1.3596 mhp = 1.3410 HP* Fuel temperature 40°C at the inlet of the fuel injection pump (ISO 8665)Technical data is according to ISO 8665 / 3046

© 2

012

Yanm

ar A

mer

ica

Corp

. /

ME-

3YM

20-S

S-09

12

WWW.US.YANMAR.COM

3YM20 specifications

Configuration 4-stroke, vertical, water cooled diesel engine

Maximum output at crankshaft * 16.2 kW (22 mhp) / 3600 rpm** 15.3 kW (21 mhp) / 3600 rpm

Continuous rating output at crankshaft 14.7 kW (20 mhp) / 3489 rpm

Displacement 0.854 L (52.1 cu in)

Bore x stroke 70 mm x 74 mm (2.8 in x 2.9 in)

Cylinders 3

Combustion system Indirect injection

Aspiration Natural aspiration

Starting system Electric starting 12 V - 1.4 kW

Alternator 12 V - 60 A

Cooling system Fresh water cooling with heat exchanger

Lubrication system Enclosed, forced lubricating system

Direction of rotation (crankshaft) Counter clockwise viewed from stern

Dry weight without gear 120 kg (266 lbs)

Environmental Meets the comprehensive emissions regulations introduced in EU and US (Tier II) in 2006

Engine mounting Rubber type flexible mounts

NOTE: Fuel condition: Density at 15°C = 0.84 g/cm 3; 1kW = 1.3596 mhp = 1.3410 HP * Fuel temperature 25°C at the inlet of the fuel injection pump (ISO 3046-1) **Fuel temperature 40°C at the inlet of the fuel injection pump (ISO 8665)Technical data is according to ISO 8665 / 3046

Dimensions (For detailed line-drawings, please refer to our web-site: www.yanmarmarine.com or contact your supplier)

Front view Right side view

370 mm (14.6 in)

215 mm (8.5 in)248 mm (9.7 in)

max

. 11

6 m

m (4

.6 in

)m

in.

102

mm

(4.0

in)

178.5 mm (7.0 in)336 mm (13.2 in)178.5 mm (7.0 in)

Exhaust pipeo 51 mm (2.0 in)

3YM20 w/ KM2P-1 marine gear

693.5 mm (27.3 in)

463 mm (18.2 in)

115

mm

(4.5

in)

Yanmar type 3YM20The Powerful Gem

600.

3 m

m (2

3.6

in) o

ptio

nal u

-mix

ing

elb

ow

Optional u-mixing elbow

528

mm

(20.

8 in

)

Rear View Right Side View

Configuration 4-stroke, vertical, water cooled diesel engine

Maximum output at crankshaft * 16.2 kW (22 mhp) / 3600 rpm** 15.3 kW (21 mhp) / 3600 rpm

Continuous rating output at crankshaft 14.7 kW (20 mhp) / 3489 rpm

Displacement 0.854 L (52.1 cu in)

Bore x stroke 70 mm x 74 mm (2.8 in x 2.9 in)

Cylinders 3

Combustion system Indirect injection

Aspiration Natural aspiration

Starting system Electric starting 12 V - 1.4 kW

Alternator 12 V - 60 A

Cooling system Fresh water cooling with heat exchanger

Lubrication system Enclosed, forced lubricating system

Direction of rotation (crankshaft) Counter clockwise viewed from stern

Dry weight without gear 120 kg (266 lbs)

Environmental Meets the comprehensive emissions regulations introduced in EU and US (Tier II) in 2006

Engine mounting Rubber type flexible mounts

NOTE: Fuel condition: Density at 15°C = 0.84 g/cm 3; 1kW = 1.3596 mhp = 1.3410 HP * Fuel temperature 25°C at the inlet of the fuel injection pump (ISO 3046-1) **Fuel temperature 40°C at the inlet of the fuel injection pump (ISO 8665)Technical data is according to ISO 8665 / 3046

Dimensions (For detailed line-drawings, please refer to our web-site: www.yanmarmarine.com or contact your supplier)

Front view Right side view

370 mm (14.6 in)

215 mm (8.5 in)248 mm (9.7 in)

max

. 11

6 m

m (4

.6 in

)m

in.

102

mm

(4.0

in)

178.5 mm (7.0 in)336 mm (13.2 in)178.5 mm (7.0 in)

Exhaust pipeo 51 mm (2.0 in)

3YM20 w/ KM2P-1 marine gear

693.5 mm (27.3 in)

463 mm (18.2 in)

115

mm

(4.5

in)

Yanmar type 3YM20The Powerful Gem

600.

3 m

m (2

3.6

in) o

ptio

nal u

-mix

ing

elb

ow

Optional u-mixing elbow

528

mm

(20.

8 in

)

PERFORMANCE CURVES

Marine Gears/Drive

Instrument Panels

Type of instrument panel

Function Digital B-type Panel1 Switch unit

1-1 Key switch for GLOW/OFF/ON/START (4-position switch) O1-2 Push button switch for engine stop O1-3 Moisture cap for key switch O2 Alarm lamp unit

2-1 Battery low charge alarm O2-2 Coolant high temperature alarm O2-3 Lubricating oil low pressure O2-4 Water in sail drive seal alarm O2-5 Water in fuel filter alarm X2-6 Sea water insufficient flow alarm X3 Meters

3-1 Lubricating oil pressure meter X3-2 Coolant temperature meter X3-3 Hour meter O3-4 Tachometer O4 Audible alarm buzzer O

Note: O = Equipped on panel X = Not equipped on panel

Standard Package• Set of flexible mounts• Exhaust mixing elbow (L-type)• V-belt safety cover• Expansion tank for fresh water cooling system• Alternator 12 V - 60 A• Electric stop solenoid

Optional• Digital B-type instrument panel • Primary 80 A alternator• Exhaust mixing elbow, U-type (high riser)• Various extension wire harnesses• Hot water fittings

Accessories

1-1 1-33-4 3-3

2-2 2-3 2-4 2-1

DigitalB-typePanel

140

125

79.5180

165 145

13.5

Texts and illustrations are not binding. Yanmar Marine reserves the right to introduce adaptations without prior notification.

1-2

Model KM2P-1 Saildrive (SD20)

Type Constant mesh gear with servo-cone clutch Constant mesh gear with dog clutch

Dry weight 10 kg (22 lbs) 30 kg (66 lbs)

Reduction ratio (fwd/asn) 2.21/3.06 2.62/3.06 3.22/3.06 2.64/2.64

Propeller speed (fwd/asn) 1628/1164 1374/1164 1118/1164 1364/1364

Direction of rotation Clockwise Counter clockwise(propeller shaft - fwd) viewed from stern viewed from stern

Dry weight engine and gear/drive 130 kg (287 lbs) 151 kg (333 lbs)

Length engine and gear/drive 693 mm (27 in) 873 mm (34 in)

Performance Curves (Output is according ISO 8665)

0

1

2

3

4

5

6

1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 38000

0.3

0.6

0.9

1.2

1.5

Maximum output at crankshaft

Power Torque

Maximum output at prop shaft

Propeller power curve

Fuel ConsumptionOu

tput

(cra

nksh

aft/p

rope

ller s

haft)

kW

Outp

ut (c

rank

shaf

t/pro

pelle

r sha

ft) m

hp

Cran

ksha

ft To

rque

Nm

Cran

ksha

ft To

rque

lb-

ft

Fuel

Con

sum

ptio

n L/

hr

Fuel

Con

sum

ptio

n ga

l/hr

Crankshaft Speed min-1 Crankshaft Speed min-1 Crankshaft Speed min-1

www.yanmarmarine.com

0

3

6

9

12

15

18

1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800

0

2

4

6

8

10

12

14

16

18

20

22

24

30

40

50

60

70

1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800

21

31

41

51

3YM20 Version: 2006-03

Marine Gears/Drive

Instrument Panels

Type of instrument panel

Function Digital B-type Panel1 Switch unit

1-1 Key switch for GLOW/OFF/ON/START (4-position switch) O1-2 Push button switch for engine stop O1-3 Moisture cap for key switch O2 Alarm lamp unit

2-1 Battery low charge alarm O2-2 Coolant high temperature alarm O2-3 Lubricating oil low pressure O2-4 Water in sail drive seal alarm O2-5 Water in fuel filter alarm X2-6 Sea water insufficient flow alarm X3 Meters

3-1 Lubricating oil pressure meter X3-2 Coolant temperature meter X3-3 Hour meter O3-4 Tachometer O4 Audible alarm buzzer O

Note: O = Equipped on panel X = Not equipped on panel

Standard Package• Set of flexible mounts• Exhaust mixing elbow (L-type)• V-belt safety cover• Expansion tank for fresh water cooling system• Alternator 12 V - 60 A• Electric stop solenoid

Optional• Digital B-type instrument panel • Primary 80 A alternator• Exhaust mixing elbow, U-type (high riser)• Various extension wire harnesses• Hot water fittings

Accessories

1-1 1-33-4 3-3

2-2 2-3 2-4 2-1

DigitalB-typePanel

140

125

79.5180

165 145

13.5

Texts and illustrations are not binding. Yanmar Marine reserves the right to introduce adaptations without prior notification.

1-2

Model KM2P-1 Saildrive (SD20)

Type Constant mesh gear with servo-cone clutch Constant mesh gear with dog clutch

Dry weight 10 kg (22 lbs) 30 kg (66 lbs)

Reduction ratio (fwd/asn) 2.21/3.06 2.62/3.06 3.22/3.06 2.64/2.64

Propeller speed (fwd/asn) 1628/1164 1374/1164 1118/1164 1364/1364

Direction of rotation Clockwise Counter clockwise(propeller shaft - fwd) viewed from stern viewed from stern

Dry weight engine and gear/drive 130 kg (287 lbs) 151 kg (333 lbs)

Length engine and gear/drive 693 mm (27 in) 873 mm (34 in)

Performance Curves (Output is according ISO 8665)

0

1

2

3

4

5

6

1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 38000

0.3

0.6

0.9

1.2

1.5

Maximum output at crankshaft

Power Torque

Maximum output at prop shaft

Propeller power curve

Fuel Consumption

Outp

ut (c

rank

shaf

t/pro

pelle

r sha

ft) k

W

Outp

ut (c

rank

shaf

t/pro

pelle

r sha

ft) m

hp

Cran

ksha

ft To

rque

Nm

Cran

ksha

ft To

rque

lb-

ft

Fuel

Con

sum

ptio

n L/

hr

Fuel

Con

sum

ptio

n ga

l/hr

Crankshaft Speed min-1 Crankshaft Speed min-1 Crankshaft Speed min-1

www.yanmarmarine.com

0

3

6

9

12

15

18

1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800

0

2

4

6

8

10

12

14

16

18

20

22

24

30

40

50

60

70

1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800

21

31

41

51

3YM20 Version: 2006-03

MARINE GEARS/DRIVE

Model KM2P-1 Saildrive (SD20)

Type Constant mesh gear with servo-cone clutch

Constant mesh gear with dog clutch

Dry weight 22 lbs (10 kg) 66 lbs (30 kg)

Reduction ratio(fwd/asn)

2.21/3.06 2.21/3.06 3.22/3.06 2.64/2.64

Propeller speed(fwd/asn)

1628/1164 1374/1164 1118/1164 1364/1364

Direction of rotation from the stern Clockwise viewed from stern

Counterclockwise viewed from stern

Dry weight - engine & gear

287 lbs (130 kg) 333 lbs (151 kg)

Length engine and gear/drive

27 in (693 mm) 34 in (873 mm)Instrument Panels B and C (Optional)

RPM x 1000

0

1

2 3

4

5-      +

40

60

80

100

120

0

2

4 6

8

10

STOP