Loading... Please wait...

Our Newsletter

Yanmar 3YM20 Inboard Diesel Engine

  • Yanmar_3YM20_Inboard_Diesel_Engine
  • Yanmar_3YM20
Ready In Stock
Free Shipping
Minimum Purchase:
1 unit(s)
Bookmark and Share

Product Description

Available in stock Brand New Yanmar 3YM20 Inboard Diesel Engine for sale. We offer the most affordable price US $2810.00. Limited stock, grab it fast.

3 Cylinder, 0.85-liter diesel engine, Naturally Aspirated, Gear - KM2P-1, Sail Drive - SD25

Product Information

The latest in a series of new-generation compact diesels from Yanmar Marine is its three-cylinder 3YM20, developing 21HP (15.3kW) at 3,600 rpm. Displacement is 0.854 litres. The naturally aspirated 3YM20 features a completely redesigned cylinder block and combustion system, configured for quietest possible, vibration-free running. It is a vertical four-stroke, fresh water cooled. With indirect injection and a swir l pre-combustion chamber, this all-new unit complies with EPA Tier 2 and BSO/SAV Stage 2 emissions regulations. A compact control panel, injection pump, electric stop solenoid and 60-amp alternator are introduced as standard. To meet heavier electrical demands, an 80-amp alternator is offered as an option. Maintenance has been simplified, with the water pump, fuel filter, oil change and dip stick located on the same side of the engine, at the front. This engine is available as a standard inboard, or with Yanmar’s double-seal saildrive unit. The inboard has a servo-cone clutch with a choice of 2.21:1, 2.62:1 and 3.22:1 forward ratios, plus 3.06:1 in reverse. The saildrive version, designated 3YM20C, has a constant mesh dog clutch, geared at 2.64:1 forward and reverse. In recent months, Yanmar Marine has introduced new diesels for sailboats and smaller motor boats at 29HP (21.3kW), 39HP (28.7kW) and 54HP (39.6kW). The 3YM20 at 21HP replaces Yanmar’s 2GM20 and provides around 17% more power.


Rated Output : 15.3 kW / 21 mhp
Rated Speed : 3600 rpm
Displacement : 0.854 L / 52.1 cu. in
No. of cylinders : 3 cylinders
Cylinder Bore x Stroke : 70 mm x 74 mm / 2.76 in x 2.91 in
Combustion system : Indirect Injection, In-line Pump
Aspiration : Natural
Alternator : 12V - 125A
Dry weight without gear : 110 kg / 243 lbs
Dimensions : 694 mm x 463 mm x 600 mm
Controls : Mechanical
Certifications : RCD 2, EPA Tier 3, EPA Tier 3C, BSO II, EMC

Standard Engine Package

- Exhaust mixing elbow [L-type]
- Alternator 12V – 125A
- B20 panel
- Flexible mounts
- Expansion tank for fresh water cooling system
- Electric stop solenoid
- Belt safety cover

Optional Accessories

- High-riser mixing elbow [instead of L-elbow]
- Extension wire harness [4m, 6m]
- Dual harness [for 2nd station]
- TFX Sidemount control head
- Hot water kit with cocks
- Extension saildrive leg [50 mm]
- Propeller cone nut kit SD25
- On-board spare parts kit

Warranty Information

Warranty: 5 Years

Find Similar Products by Tag

Find Similar Products by Category

Write your own product review

Product Reviews

  1. Good deal

    Posted by Le Gueva Yacht on 16th Jun 2022

    What a good deal. Best price and good service.

    Thank you

    Le Gueva Yacht

Add to Wish List

Click the button below to add the Yanmar 3YM20 Inboard Diesel Engine to your wish list.

You Recently Viewed...