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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
    £8.00 Ex VAT
    £9.60 Inc VAT
    Keypart Price
    £7.20 Ex VAT
    £8.64 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
    £65.23 Ex VAT
    £78.28 Inc VAT
    Keypart Price
    £58.71 Ex VAT
    £70.45 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
    £32.00 Ex VAT
    £38.40 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
    £109.00 Ex VAT
    £130.80 Inc VAT
    Keypart Price
    £87.20 Ex VAT
    £104.64 Inc VAT
    Low Stock

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Cooling System

  • 128990-42200-R - Yanmar 3YM20 Diesel Engine Impeller - Replacement
    128990-42200-R
    Impeller - Replacement
    List Price
    £20.79 Ex VAT
    £24.95 Inc VAT
    Keypart Price
    £16.63 Ex VAT
    £19.96 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
    £1.37 Ex VAT
    £1.64 Inc VAT
    In Stock

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  • Awaiting
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    128990-77350E
    Drive Belt - Genuine - (to Serial No E00304)
    Keypart Price
    £20.30 Ex VAT
    £24.36 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
    £10.73 Ex VAT
    £12.88 Inc VAT
    Keypart Price
    £9.66 Ex VAT
    £11.59 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
    £64.60 Ex VAT
    £77.52 Inc VAT
    Keypart Price
    £58.14 Ex VAT
    £69.77 Inc VAT
    In Stock

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Fuel System

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
    £7.80 Ex VAT
    £9.36 Inc VAT
    Keypart Price
    £5.46 Ex VAT
    £6.55 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
    £4.65 Ex VAT
    £5.58 Inc VAT
    Keypart Price
    £3.82 Ex VAT
    £4.58 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
    £130.00 Ex VAT
    £156.00 Inc VAT
    Keypart Price
    £52.00 Ex VAT
    £62.40 Inc VAT
    In Stock

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Electrical System

  • Awaiting
    Image
    129608-77010
    Starter Motor Assembly - Genuine
    List Price
    £433.72 Ex VAT
    £520.46 Inc VAT
    Keypart Price
    £390.35 Ex VAT
    £468.42 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
    £884.06 Ex VAT
    £1,060.87 Inc VAT
    Keypart Price
    £442.00 Ex VAT
    £530.40 Inc VAT
    Special Order Usually 3 - 5 Days

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  • 119831-42290 - Yanmar 3YM20 Diesel Engine Alternator Drive Belt - Genuine - (to 06/2004)
    119831-42290
    Alternator Drive Belt - Genuine - (to 06/2004)
    Keypart Price
    £13.09 Ex VAT
    £15.71 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
    £17.84 Ex VAT
    £21.41 Inc VAT
    Keypart Price
    £14.27 Ex VAT
    £17.12 Inc VAT
    In Stock

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  • Awaiting
    Image
    128990-77250
    12V/120A Alternator Assembly - Genuine - from Serial Number E11906)
    List Price
    £412.65 Ex VAT
    £495.18 Inc VAT
    Keypart Price
    £371.38 Ex VAT
    £445.66 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
    £15.67 Ex VAT
    £18.80 Inc VAT
    Keypart Price
    £14.10 Ex VAT
    £16.92 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
    £135.62 Ex VAT
    £162.74 Inc VAT
    Keypart Price
    £122.06 Ex VAT
    £146.47 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
    £83.00 Ex VAT
    £99.60 Inc VAT
    Keypart Price
    £53.95 Ex VAT
    £64.74 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
    £101.00 Ex VAT
    £121.20 Inc VAT
    Keypart Price
    £75.75 Ex VAT
    £90.90 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
    £132.00 Ex VAT
    £158.40 Inc VAT
    Keypart Price
    £90.00 Ex VAT
    £108.00 Inc VAT
    In Stock

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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
    £151.00 Ex VAT
    £181.20 Inc VAT
    Keypart Price
    £95.00 Ex VAT
    £114.00 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
    £83.00 Ex VAT
    £99.60 Inc VAT
    Keypart Price
    £74.70 Ex VAT
    £89.64 Inc VAT
    Low 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
    £101.00 Ex VAT
    £121.20 Inc VAT
    Keypart Price
    £90.90 Ex VAT
    £109.08 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
    £132.00 Ex VAT
    £158.40 Inc VAT
    Keypart Price
    £118.80 Ex VAT
    £142.56 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
    £151.00 Ex VAT
    £181.20 Inc VAT
    Keypart Price
    £135.90 Ex VAT
    £163.08 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
    £86.20 Ex VAT
    £103.44 Inc VAT
    Keypart Price
    £77.58 Ex VAT
    £93.10 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
    £3.20 Ex VAT
    £3.84 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
    In 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.

  • LOCTITE-243-10ML - Yanmar 3YM20 Diesel Engine Loctite Threadlock 10ml
    LOCTITE-243-10ML
    Loctite Threadlock 10ml
    List Price
    £16.00 Ex VAT
    £19.20 Inc VAT
    Keypart Price
    £13.00 Ex VAT
    £15.60 Inc VAT
    In Stock

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  • LOCTITE-243-50ML - Yanmar 3YM20 Diesel Engine Loctite Threadlock 50ml
    LOCTITE-243-50ML
    Loctite Threadlock 50ml
    List Price
    £45.00 Ex VAT
    £54.00 Inc VAT
    Keypart Price
    £40.00 Ex VAT
    £48.00 Inc VAT
    In Stock

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  • ACT1822 - Yanmar 3YM20 Diesel Engine *AEROSOL* RP-90 Rapid Penetrating & Release Fluid 500ml (shipping restrictions apply - see above)
    ACT1822
    *AEROSOL* RP-90 Rapid Penetrating & Release Fluid 500ml (shipping restrictions apply - see above)
    Keypart Price
    £5.47 Ex VAT
    £6.56 Inc VAT
    In Stock

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  • ACT1847 - Yanmar 3YM20 Diesel Engine *AEROSOL* SA-90 Industrial Strength Adhesive 500ml (Shipping restrictions apply - see above)
    ACT1847
    *AEROSOL* SA-90 Industrial Strength Adhesive 500ml (Shipping restrictions apply - see above)
    Keypart Price
    £11.64 Ex VAT
    £13.97 Inc VAT
    In Stock

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  • ACT1558 - Yanmar 3YM20 Diesel Engine *AEROSOL* Amaze Dash Plastic & Rubber Cleaner 500ml (Shipping restrictions apply - see above)
    ACT1558
    *AEROSOL* Amaze Dash Plastic & Rubber Cleaner 500ml (Shipping restrictions apply - see above)
    Keypart Price
    £5.33 Ex VAT
    £6.40 Inc VAT
    In Stock

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  • ACT1839 - Yanmar 3YM20 Diesel Engine *AEROSOL* AC-90 Moisture Displacement & Lubricant 500ml (Shipping restrictions apply - see above)
    ACT1839
    *AEROSOL* AC-90 Moisture Displacement & Lubricant 500ml (Shipping restrictions apply - see above)
    Keypart Price
    £6.83 Ex VAT
    £8.20 Inc VAT
    In Stock

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  • ACT1947 - Yanmar 3YM20 Diesel Engine *AEROSOL* Supertrol 001 Heavy Duty Corrosion Protector 500ml - Ideal for corrosion protection of steel components in storage or in transit.
    ACT1947
    *AEROSOL* Supertrol 001 Heavy Duty Corrosion Protector 500ml - Ideal for corrosion protection of steel components in storage or in transit.
    Keypart Price
    £8.72 Ex VAT
    £10.46 Inc VAT
    Low Stock

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  • WASP-BIOKEM-SP15-50ML - Yanmar 3YM20 Diesel Engine 50ml Wasp Biocide (Preventative Treatment for 500 litres of Fuel) - - for more information on this product see www.separ.co.uk
    WASP-BIOKEM-SP15-50ML
    50ml Wasp Biocide (Preventative Treatment for 500 litres of Fuel) - - for more information on this product see www.separ.co.uk
    Keypart Price
    £9.25 Ex VAT
    £11.10 Inc VAT
    Special Order Usually 2 - 4 Days

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  • WASP-BIOKEM-SP15 - Yanmar 3YM20 Diesel Engine 250ml Wasp Biocide (Preventative Treatment for 2500 litres of Fuel) - - for more information on this product see www.separ.co.uk
    WASP-BIOKEM-SP15
    250ml Wasp Biocide (Preventative Treatment for 2500 litres of Fuel) - - for more information on this product see www.separ.co.uk
    Keypart Price
    £24.14 Ex VAT
    £28.97 Inc VAT
    In Stock

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  • 40.083 - Yanmar 3YM20 Diesel Engine *AEROSOL* Yanmar Grey Metallic Aerosol Paint 400ml (Shipping restrictions apply - see above)
    40.083
    *AEROSOL* Yanmar Grey Metallic Aerosol Paint 400ml (Shipping restrictions apply - see above)
    List Price
    £12.00 Ex VAT
    £14.40 Inc VAT
    Keypart Price
    £9.00 Ex VAT
    £10.80 Inc VAT
    In Stock

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  • ACT1848 - Yanmar 3YM20 Diesel Engine *AEROSOL* TF-90 Fast Dry Cleaning Solvent & Degreaser 500ml (Shipping restrictions apply - see above)
    ACT1848
    *AEROSOL* TF-90 Fast Dry Cleaning Solvent & Degreaser 500ml (Shipping restrictions apply - see above)
    Keypart Price
    £8.53 Ex VAT
    £10.24 Inc VAT
    In Stock

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  • ACT1851 - Yanmar 3YM20 Diesel Engine *AEROSOL* Multi-Purpose Oil with Anti-rust 415ml - A must for Boats (Shipping restrictions apply - see above)
    ACT1851
    *AEROSOL* Multi-Purpose Oil with Anti-rust 415ml - A must for Boats (Shipping restrictions apply - see above)
    Keypart Price
    £5.61 Ex VAT
    £6.73 Inc VAT
    Please Contact for Stock Status

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Tools & Manuals

  • 33799-0000 - Yanmar 3YM20 Diesel Engine Oil Change Pump Kit (Universal)
    33799-0000
    Oil Change Pump Kit (Universal)
    List Price
    £65.23 Ex VAT
    £78.28 Inc VAT
    Keypart Price
    £58.71 Ex VAT
    £70.45 Inc VAT
    In Stock

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3YM20 Diesel Engine