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3YM20

3YM20

3YM20-2 Marine Installation Manual - Volume 2

© 2007 Yanmar Marine International

3YM20

Engine Specifications

Notes:

1. Rating condition:

* Fuel temperature: 25°C at fuel pump

inlet ISO 3046-1

** Fuel temperature: 40°C at fuel pump

inlet ISO 8665

Fuel density: 0.842 g/cm

3

at 15°C

2. 1 HP (hp metric) = 0.7355 kW

Parameter Data

Configuration 4-cycle, Vertical,

Water-Cooled Diesel

Crankshaft Rotation

(Viewed from Stern)

Counterclockwise

Combustion System Swirl Pre-Combustion

Chamber

Aspiration Naturally Aspirated

Number of Cylinders 3

Bore x Stroke 70 mm x 74 mm

(2.76 in. x 2.91 in.)

Displacement 0.854 L

(52 cu in.)

Continuous Rating

Output at Crankshaft

(at 3489 rpm)

14.7 kW*

(20.0 hp metric)*

Brake Mean Effective

Pressure

(Continuous Rating

Output)

0.59 MPa

6.04 kgf/cm

2

(85.57 psi)

Piston Speed

(Continuous Rating

Output)

8.61 m/sec.

(28.25 ft/sec.)

Maximum Output at

Crankshaft

(at 3600 rpm)

16.2 kW*

(22.0 hp metric)*

or

15.3 kW**

(20.8 hp metric)**

Brake Mean Effective

Pressure

(Maximum Output)

0.63 MPa*

6.44 kgf/cm

2

*

(91.38 psi)*

Piston Speed

(Maximum Output)

8.88 m/sec.

(29.13 ft/sec.)

High Idling Speed 3890 ± 25 rpm

Idling Speed 850 ± 25 rpm

Firing Order

240° 240° 240°

1 - 3 - 2 - 1

Starter Motor DC 12 V, 1.4 kW

Alternator DC 12 V, 60A

DC 12 V, 80A - Optional

Minimum Battery

Capacity

DC 12 V, 64 Ah

Cooling System Fresh water cooling by

centrifugal fresh water

pump and rubber

impeller seawater pump

Coolant Capacity

(Engine)

4.1 L

(4.3 qt)

Coolant Recovery Tank

Capacity

0.8 L

(0.85 qt)

Engine Lubrication

System

Forced lubrication with

trochoid pump

Engine Oil Capacity

at 8° rake angle

(Effective / Maximum)

1.4 / 2.7 L

(1.48 / 2.85 qt)

Engine Oil Capacity

at 0° rake angle

(Effective / Maximum)

1.5 / 2.4 L

(1.59 / 2.54 qt)

Dry Weight

(with SD20)

144 kg

(318 lb)

Dry Weight

(with KM2P-1)

120 kg

(265 lb)

Recommended

Installation Rake Angle

KM2P-1: 8°

SD20: 0°

Maximum Installation

Rake Angle

KM2P-1: 15°

Parameter Data

JUN 2006 (Rev. 1)

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