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3YM20 Diesel Engine

Engine

20hp@3600rpm

Lubricants

Engine oil capacity is approximately 2.4 to 2.7 Litres

  • 22479638 - Yanmar 3YM20 Diesel Engine VDS-3 15W/40 Volvo Engine Oil 1-Litre - Genuine (Not available to customers outside the UK)
    22479638
    VDS-3 15W/40 Volvo Engine Oil 1-Litre - Genuine (Not available to customers outside the UK)
    List Price
    £8.70 Ex VAT
    £10.44 Inc VAT
    Keypart Price
    £7.83 Ex VAT
    £9.40 Inc VAT
    Low Stock

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  • 33799-0000 - Yanmar 3YM20 Diesel Engine Oil Change Pump Kit (Universal)
    33799-0000
    Oil Change Pump Kit (Universal)
    List Price
    £75.00 Ex VAT
    £90.00 Inc VAT
    Keypart Price
    £63.00 Ex VAT
    £75.60 Inc VAT
    In Stock

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  • 23068343 - Yanmar 3YM20 Diesel Engine VDS-4.5 15W/40 High-performance Volvo Engine Oil 5-Litre - Genuine (Not available to customers outside the UK) - (may be mixed with VDS-3)
    23068343
    VDS-4.5 15W/40 High-performance Volvo Engine Oil 5-Litre - Genuine (Not available to customers outside the UK) - (may be mixed with VDS-3)
    Keypart Price
    £36.10 Ex VAT
    £43.32 Inc VAT
    In Stock

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  • 23039851 - Yanmar 3YM20 Diesel Engine VDS-4.5 15W/40 High-performance Volvo Engine Oil 20-Litre - Genuine (Not available to customers outside the UK) - (may be mixed with VDS-3)
    23039851
    VDS-4.5 15W/40 High-performance Volvo Engine Oil 20-Litre - Genuine (Not available to customers outside the UK) - (may be mixed with VDS-3)
    List Price
    £118.00 Ex VAT
    £141.60 Inc VAT
    Keypart Price
    £94.40 Ex VAT
    £113.28 Inc VAT
    In Stock

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Cooling System

  • 128990-42200-R - Yanmar 3YM20 Diesel Engine Impeller - Replacement
    128990-42200-R
    Impeller - Replacement
    List Price
    £21.62 Ex VAT
    £25.94 Inc VAT
    Keypart Price
    £17.30 Ex VAT
    £20.76 Inc VAT
    In Stock

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  • X02173476 - Yanmar 3YM20 Diesel Engine O-ring for Sea-water Pump Cover
    X02173476
    O-ring for Sea-water Pump Cover
    Keypart Price
    £1.42 Ex VAT
    £1.70 Inc VAT
    In Stock

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  • Awaiting
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    128990-77350E
    Drive Belt - Genuine - (to Serial No E00304)
    Keypart Price
    £21.11 Ex VAT
    £25.33 Inc VAT
    In Stock

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  • 104511-78780-R - Yanmar 3YM20 Diesel Engine Drive Belt for Sea-water Pump - Replacement - (from Serial No E00305)
    104511-78780-R
    Drive Belt for Sea-water Pump - Replacement - (from Serial No E00305)
    List Price
    £11.16 Ex VAT
    £13.39 Inc VAT
    Keypart Price
    £8.93 Ex VAT
    £10.72 Inc VAT
    In Stock

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  • 196450-02492 - Yanmar 3YM20 Diesel Engine Aluminium Anode Split Ring For Yanmar Saildrives - See separate Saildrive section
    196450-02492
    Aluminium Anode Split Ring For Yanmar Saildrives - See separate Saildrive section
    List Price
    £67.18 Ex VAT
    £80.62 Inc VAT
    Keypart Price
    £60.46 Ex VAT
    £72.55 Inc VAT
    In Stock

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Fuel System (Engine)

Optional Fuel System Components

For additional types of Fuel Filters & Elements, please visit the Racor & Separ sections of our Website. These can be found under the "Accessories" heading on our Home Page.

  • 3581078-R - Yanmar 3YM20 Diesel Engine Fuel Filter for CAV/Delphi 296 Pre-filter (Optional) - Replacement
    3581078-R
    Fuel Filter for CAV/Delphi 296 Pre-filter (Optional) - Replacement
    List Price
    £8.20 Ex VAT
    £9.84 Inc VAT
    Keypart Price
    £5.74 Ex VAT
    £6.89 Inc VAT
    In Stock

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  • 36-17 - Yanmar 3YM20 Diesel Engine Seal Kit for CAV/Delphi 296 Pre-filter
    36-17
    Seal Kit for CAV/Delphi 296 Pre-filter
    List Price
    £5.13 Ex VAT
    £6.16 Inc VAT
    Keypart Price
    £4.10 Ex VAT
    £4.92 Inc VAT
    In Stock

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  • 877767-R - Yanmar 3YM20 Diesel Engine CAV/Delphi 296 Fuel Filter Assembly
    877767-R
    CAV/Delphi 296 Fuel Filter Assembly
    List Price
    £141.00 Ex VAT
    £169.20 Inc VAT
    Keypart Price
    £112.80 Ex VAT
    £135.36 Inc VAT
    In Stock

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Electrical System

  • Awaiting
    Image
    129608-77010
    Starter Motor Assembly - Genuine
    List Price
    £451.07 Ex VAT
    £541.28 Inc VAT
    Keypart Price
    £405.96 Ex VAT
    £487.15 Inc VAT
    Special Order Usually 3 - 5 Days

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  • Awaiting
    Image
    128271-77200
    14V/60 Alternator Assembly - Replacement - (up to Serial Number E11906)
    List Price
    £919.42 Ex VAT
    £1,103.30 Inc VAT
    Keypart Price
    £459.71 Ex VAT
    £551.65 Inc VAT
    Special Order Usually 3 - 5 Days

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  • 119831-42290E - Yanmar 3YM20 Diesel Engine Alternator Drive Belt - Genuine - (to 06/2004)
    119831-42290E
    Alternator Drive Belt - Genuine - (to 06/2004)
    Keypart Price
    £13.61 Ex VAT
    £16.33 Inc VAT
    In Stock

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  • 129612-42290E - Yanmar 3YM20 Diesel Engine Alternator Drive Belt - (from 06/2004)
    129612-42290E
    Alternator Drive Belt - (from 06/2004)
    List Price
    £18.55 Ex VAT
    £22.26 Inc VAT
    Keypart Price
    £14.84 Ex VAT
    £17.81 Inc VAT
    In Stock

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  • Awaiting
    Image
    128990-77250
    12V/120A Alternator Assembly - Genuine - from Serial Number E11906)
    List Price
    £429.16 Ex VAT
    £514.99 Inc VAT
    Keypart Price
    £386.24 Ex VAT
    £463.49 Inc VAT
    Special Order Usually 3 - 5 Days

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  • Awaiting
    Image
    128790-77580
    Serpentine Belt - Genuine - (for 12V/120A Alernators - Serial E11906 and up)
    List Price
    £16.30 Ex VAT
    £19.56 Inc VAT
    Keypart Price
    £14.67 Ex VAT
    £17.60 Inc VAT
    Special Order Usually 3 - 5 Days

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Repair Items

  • Awaiting
    Image
    128377-08341
    Engine Mount - Genuine - (Rear - Marked 75)
    List Price
    £164.58 Ex VAT
    £197.50 Inc VAT
    Keypart Price
    £148.12 Ex VAT
    £177.74 Inc VAT
    Special Order Usually 3 - 5 Days

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  • Awaiting
    Image
    128377-08351
    Engine Mount - Genuine - (Front - Marked 100)
    List Price
    £141.04 Ex VAT
    £169.25 Inc VAT
    Keypart Price
    £126.94 Ex VAT
    £152.33 Inc VAT
    Special Order Usually 3 - 5 Days

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Repair Kits

  • 828254-R - Yanmar 3YM20 Diesel Engine Rubber Stuffing Box for 25 mm Shaft with Sleeve Diameter of 42mm - Replacement
    828254-R
    Rubber Stuffing Box for 25 mm Shaft with Sleeve Diameter of 42mm - Replacement
    List Price
    £91.20 Ex VAT
    £109.44 Inc VAT
    Keypart Price
    £59.28 Ex VAT
    £71.14 Inc VAT
    In Stock

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  • 828422-R - Yanmar 3YM20 Diesel Engine Rubber Stuffing Box for 30 mm Shaft wiith Sleeve Diameter of 48mm - Replacement
    828422-R
    Rubber Stuffing Box for 30 mm Shaft wiith Sleeve Diameter of 48mm - Replacement
    List Price
    £110.00 Ex VAT
    £132.00 Inc VAT
    Keypart Price
    £82.50 Ex VAT
    £99.00 Inc VAT
    In Stock

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  • 828526-R - Yanmar 3YM20 Diesel Engine Rubber Stuffing Box for 35 mm Shaft with Sleeve Diameter of 54mm - Replacement
    828526-R
    Rubber Stuffing Box for 35 mm Shaft with Sleeve Diameter of 54mm - Replacement
    List Price
    £143.00 Ex VAT
    £171.60 Inc VAT
    Keypart Price
    £95.00 Ex VAT
    £114.00 Inc VAT
    Please Contact for Stock Status

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  • 828527-R - Yanmar 3YM20 Diesel Engine Rubber Stuffing Box for 40 mm Shaft with Sleeve Diameter of 60mm - Replacement
    828527-R
    Rubber Stuffing Box for 40 mm Shaft with Sleeve Diameter of 60mm - Replacement
    List Price
    £163.00 Ex VAT
    £195.60 Inc VAT
    Keypart Price
    £100.00 Ex VAT
    £120.00 Inc VAT
    In Stock

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  • 828254 - Yanmar 3YM20 Diesel Engine Rubber Stuffing Box for 25 mm Shaft with Sleeve Diameter of 42mm - Genuine
    828254
    Rubber Stuffing Box for 25 mm Shaft with Sleeve Diameter of 42mm - Genuine
    List Price
    £91.20 Ex VAT
    £109.44 Inc VAT
    Keypart Price
    £82.08 Ex VAT
    £98.50 Inc VAT
    In Stock

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  • 828422 - Yanmar 3YM20 Diesel Engine Rubber Stuffing Box for 30 mm Shaft wiith Sleeve Diameter of 48mm - Genuine
    828422
    Rubber Stuffing Box for 30 mm Shaft wiith Sleeve Diameter of 48mm - Genuine
    List Price
    £110.00 Ex VAT
    £132.00 Inc VAT
    Keypart Price
    £99.00 Ex VAT
    £118.80 Inc VAT
    In Stock

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  • 828526 - Yanmar 3YM20 Diesel Engine Rubber Stuffing Box for 35 mm Shaft with Sleeve Diameter of 54mm - Genuine
    828526
    Rubber Stuffing Box for 35 mm Shaft with Sleeve Diameter of 54mm - Genuine
    List Price
    £143.00 Ex VAT
    £171.60 Inc VAT
    Keypart Price
    £128.70 Ex VAT
    £154.44 Inc VAT
    Low Stock

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  • 828527 - Yanmar 3YM20 Diesel Engine Rubber Stuffing Box for 40 mm Shaft with Sleeve Diameter of 60mm - Genuine
    828527
    Rubber Stuffing Box for 40 mm Shaft with Sleeve Diameter of 60mm - Genuine
    List Price
    £163.00 Ex VAT
    £195.60 Inc VAT
    Keypart Price
    £146.70 Ex VAT
    £176.04 Inc VAT
    In Stock

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  • 3819724 - Yanmar 3YM20 Diesel Engine Rubber Stuffing Box For 1" Shaft with Sleeve Diameter of 1-3/4"- Genuine
    3819724
    Rubber Stuffing Box For 1" Shaft with Sleeve Diameter of 1-3/4"- Genuine
    List Price
    £94.50 Ex VAT
    £113.40 Inc VAT
    Keypart Price
    £85.05 Ex VAT
    £102.06 Inc VAT
    In Stock

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  • 828250 - Yanmar 3YM20 Diesel Engine 25G Tube Of Grease for Rubber Stuffing Box - Genuine
    828250
    25G Tube Of Grease for Rubber Stuffing Box - Genuine
    Keypart Price
    £3.80 Ex VAT
    £4.56 Inc VAT
    In Stock

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Zinc Shaft Clamp Anodes - Seawater Use

  • 800500ZN - Yanmar 3YM20 Diesel Engine 3/4" Zinc Shaft Anode
    800500ZN
    3/4" Zinc Shaft Anode
    List Price
    £16.00 Ex VAT
    £19.20 Inc VAT
    Keypart Price
    £11.20 Ex VAT
    £13.44 Inc VAT
    In Stock

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  • 800502ZN - Yanmar 3YM20 Diesel Engine 25mm Zinc Shaft Anode
    800502ZN
    25mm Zinc Shaft Anode
    List Price
    £17.00 Ex VAT
    £20.40 Inc VAT
    Keypart Price
    £11.90 Ex VAT
    £14.28 Inc VAT
    In Stock

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  • 800503ZN - Yanmar 3YM20 Diesel Engine 1" Zinc Shaft Anode
    800503ZN
    1" Zinc Shaft Anode
    List Price
    £16.00 Ex VAT
    £19.20 Inc VAT
    Keypart Price
    £11.20 Ex VAT
    £13.44 Inc VAT
    In Stock

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  • 800506ZN - Yanmar 3YM20 Diesel Engine 30mm Zinc Shaft Anode
    800506ZN
    30mm Zinc Shaft Anode
    List Price
    £17.00 Ex VAT
    £20.40 Inc VAT
    Keypart Price
    £11.90 Ex VAT
    £14.28 Inc VAT
    Low Stock

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  • 800507ZN - Yanmar 3YM20 Diesel Engine 1-1/4" Zinc Shaft Anode
    800507ZN
    1-1/4" Zinc Shaft Anode
    List Price
    £17.00 Ex VAT
    £20.40 Inc VAT
    Keypart Price
    £11.90 Ex VAT
    £14.28 Inc VAT
    In Stock

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  • 800509ZN - Yanmar 3YM20 Diesel Engine 35mm Zinc Shaft Anode
    800509ZN
    35mm Zinc Shaft Anode
    List Price
    £18.00 Ex VAT
    £21.60 Inc VAT
    Keypart Price
    £12.60 Ex VAT
    £15.12 Inc VAT
    In Stock

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  • 800510ZN - Yanmar 3YM20 Diesel Engine 1-1/2" Zinc Shaft Anode
    800510ZN
    1-1/2" Zinc Shaft Anode
    List Price
    £18.00 Ex VAT
    £21.60 Inc VAT
    Keypart Price
    £12.60 Ex VAT
    £15.12 Inc VAT
    In Stock

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  • 800511ZN - Yanmar 3YM20 Diesel Engine 40mm Zinc Shaft Anode
    800511ZN
    40mm Zinc Shaft Anode
    List Price
    £22.00 Ex VAT
    £26.40 Inc VAT
    Keypart Price
    £15.40 Ex VAT
    £18.48 Inc VAT
    In Stock

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  • 800512ZN - Yanmar 3YM20 Diesel Engine 45mm Zinc Shaft Anode
    800512ZN
    45mm Zinc Shaft Anode
    List Price
    £23.00 Ex VAT
    £27.60 Inc VAT
    Keypart Price
    £16.10 Ex VAT
    £19.32 Inc VAT
    In Stock

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  • 800513ZN - Yanmar 3YM20 Diesel Engine 50mm Zinc Shaft Anode
    800513ZN
    50mm Zinc Shaft Anode
    List Price
    £30.00 Ex VAT
    £36.00 Inc VAT
    Keypart Price
    £21.00 Ex VAT
    £25.20 Inc VAT
    In Stock

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  • 800514ZN - Yanmar 3YM20 Diesel Engine 2" Zinc Shaft Anode
    800514ZN
    2" Zinc Shaft Anode
    List Price
    £30.00 Ex VAT
    £36.00 Inc VAT
    Keypart Price
    £21.00 Ex VAT
    £25.20 Inc VAT
    In Stock

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Chemicals

Please note: It is NOT possible to ship most liquids by air. Aerosols can ONLY be purchased by customers in England, Scotland and Wales.

Tools & Manuals

  • 33799-0000 - Yanmar 3YM20 Diesel Engine Oil Change Pump Kit (Universal)
    33799-0000
    Oil Change Pump Kit (Universal)
    List Price
    £75.00 Ex VAT
    £90.00 Inc VAT
    Keypart Price
    £63.00 Ex VAT
    £75.60 Inc VAT
    In Stock

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3YM20 Diesel Engine