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MD21A Diesel Engine

Manufactured between the years of 1969 - 1979

Engine

75hp@4500rpm

  • 3517857 - Volvo Penta MD21A Diesel Engine Oil Filter - Genuine - (for early engines)
    3517857
    Oil Filter - Genuine - (for early engines)
    List Price
    £12.20 Ex VAT
    £14.64 Inc VAT
    Keypart Price
    £9.76 Ex VAT
    £11.71 Inc VAT
    Low Stock

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  • 21549542 - Volvo Penta MD21A Diesel Engine Oil Filter - Genuine - for Late Engines
    21549542
    Oil Filter - Genuine - for Late Engines
    List Price
    £27.90 Ex VAT
    £33.48 Inc VAT
    Keypart Price
    £25.11 Ex VAT
    £30.13 Inc VAT
    In Stock

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  • 829285-R - Volvo Penta MD21A Diesel Engine Rocker Cover Gasket
    829285-R
    Rocker Cover Gasket
    List Price
    £50.00 Ex VAT
    £60.00 Inc VAT
    Keypart Price
    £25.00 Ex VAT
    £30.00 Inc VAT
    In Stock

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  • 859152-R - Volvo Penta MD21A Diesel Engine Cylinder Head Gasket
    859152-R
    Cylinder Head Gasket
    List Price
    £260.00 Ex VAT
    £312.00 Inc VAT
    Keypart Price
    £130.00 Ex VAT
    £156.00 Inc VAT
    In Stock

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  • 859114 - Volvo Penta MD21A Diesel Engine Exhaust Manifold to Head Gasket - Genuine - (3 Required per Engine)
    859114
    Exhaust Manifold to Head Gasket - Genuine - (3 Required per Engine)
    List Price
    £12.50 Ex VAT
    £15.00 Inc VAT
    Keypart Price
    £11.25 Ex VAT
    £13.50 Inc VAT
    In Stock

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  • 859144 - Volvo Penta MD21A Diesel Engine Exhaust Manifold to Head Gasket - Genuine - (2 Required per Engine)
    859144
    Exhaust Manifold to Head Gasket - Genuine - (2 Required per Engine)
    List Price
    £10.00 Ex VAT
    £12.00 Inc VAT
    Keypart Price
    £9.00 Ex VAT
    £10.80 Inc VAT
    In Stock

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Lubricants

Engine oil capacity is approximately 5.5 Litres

  • 22479638 - Volvo Penta MD21A Diesel Engine VDS-3 15W/40 Volvo Engine Oil 1-Litre - Genuine (Not available to customers outside the UK) - (May be mixed with VDS-4)
    22479638
    VDS-3 15W/40 Volvo Engine Oil 1-Litre - Genuine (Not available to customers outside the UK) - (May be mixed with VDS-4)
    List Price
    £8.70 Ex VAT
    £10.44 Inc VAT
    Keypart Price
    £7.83 Ex VAT
    £9.40 Inc VAT
    In Stock

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  • 33799-0000 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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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  • 22567206 - Volvo Penta MD21A Diesel Engine Type 90 Green Coolant/Anti-freeze Concentrate - 5 Litre - Genuine - May NOT be mixed with Yellow (Not available to customers outside the UK)
    22567206
    Type 90 Green Coolant/Anti-freeze Concentrate - 5 Litre - Genuine - May NOT be mixed with Yellow (Not available to customers outside the UK)
    Keypart Price
    £38.70 Ex VAT
    £46.44 Inc VAT
    In Stock

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  • 22567295 - Volvo Penta MD21A Diesel Engine VCS Yellow Coolant/Anti-Freeze Concentrate 5 Litre - Genuine - May NOT be mixed with Green (Not available to customers outside the UK)
    22567295
    VCS Yellow Coolant/Anti-Freeze Concentrate 5 Litre - Genuine - May NOT be mixed with Green (Not available to customers outside the UK)
    Keypart Price
    £39.30 Ex VAT
    £47.16 Inc VAT
    In Stock

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Cooling System

  • 82744-R - Volvo Penta MD21A Diesel Engine Drain Tap
    82744-R
    Drain Tap
    Keypart Price
    £10.20 Ex VAT
    £12.24 Inc VAT
    In Stock

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  • 838929-R - Volvo Penta MD21A Diesel Engine Zinc Pencil Anode - Sea-water use
    838929-R
    Zinc Pencil Anode - Sea-water use
    List Price
    £8.50 Ex VAT
    £10.20 Inc VAT
    Keypart Price
    £5.95 Ex VAT
    £7.14 Inc VAT
    In Stock

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  • 838929M - Volvo Penta MD21A Diesel Engine Magnesium Pencil Anode - Fresh-water use
    838929M
    Magnesium Pencil Anode - Fresh-water use
    List Price
    £9.50 Ex VAT
    £11.40 Inc VAT
    Keypart Price
    £7.12 Ex VAT
    £8.54 Inc VAT
    In Stock

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  • 838928-R - Volvo Penta MD21A Diesel Engine Brass Holder for 838929 Pencil Anode
    838928-R
    Brass Holder for 838929 Pencil Anode
    List Price
    £14.30 Ex VAT
    £17.16 Inc VAT
    Keypart Price
    £11.44 Ex VAT
    £13.73 Inc VAT
    In Stock

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  • 875785-R - Volvo Penta MD21A Diesel Engine Thermostat Kit
    875785-R
    Thermostat Kit
    List Price
    £43.30 Ex VAT
    £51.96 Inc VAT
    Keypart Price
    £34.64 Ex VAT
    £41.57 Inc VAT
    In Stock

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  • 831009-R - Volvo Penta MD21A Diesel Engine Seawater Pump Drive Coupling
    831009-R
    Seawater Pump Drive Coupling
    List Price
    £10.00 Ex VAT
    £12.00 Inc VAT
    Keypart Price
    £8.00 Ex VAT
    £9.60 Inc VAT
    In Stock

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  • 925066-R - Volvo Penta MD21A Diesel Engine O-ring - Seawater Pump to Block
    925066-R
    O-ring - Seawater Pump to Block
    Keypart Price
    £2.40 Ex VAT
    £2.88 Inc VAT
    In Stock

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  • 3862281-R - Volvo Penta MD21A Diesel Engine Impeller Kit - Replacement - - for early Pumps with Splined Hub
    3862281-R
    Impeller Kit - Replacement - - for early Pumps with Splined Hub
    List Price
    £32.30 Ex VAT
    £38.76 Inc VAT
    Keypart Price
    £25.84 Ex VAT
    £31.01 Inc VAT
    In Stock

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  • 875575-R - Volvo Penta MD21A Diesel Engine Impeller Kit - Replacement - for later Pumps with Key Drive
    875575-R
    Impeller Kit - Replacement - for later Pumps with Key Drive
    List Price
    £47.70 Ex VAT
    £57.24 Inc VAT
    Keypart Price
    £33.39 Ex VAT
    £40.07 Inc VAT
    In Stock

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  • 21951350 - Volvo Penta MD21A Diesel Engine Impeller Kit - Genuine - for later Pumps with Key Drive
    21951350
    Impeller Kit - Genuine - for later Pumps with Key Drive
    List Price
    £47.70 Ex VAT
    £57.24 Inc VAT
    Keypart Price
    £42.93 Ex VAT
    £51.52 Inc VAT
    In Stock

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  • 817825-R - Volvo Penta MD21A Diesel Engine Seawater Pump Cover Screw
    817825-R
    Seawater Pump Cover Screw
    Keypart Price
    £1.50 Ex VAT
    £1.80 Inc VAT
    Please Contact for Stock Status

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  • 859140-R - Volvo Penta MD21A Diesel Engine Exhaust Elbow to Manifold Gasket
    859140-R
    Exhaust Elbow to Manifold Gasket
    List Price
    £20.40 Ex VAT
    £24.48 Inc VAT
    Keypart Price
    £10.20 Ex VAT
    £12.24 Inc VAT
    In Stock

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  • 831178 - Volvo Penta MD21A Diesel Engine Seawater Pump Assembly - Genuine - for Engines without Tacho Drive
    831178
    Seawater Pump Assembly - Genuine - for Engines without Tacho Drive
    List Price
    £520.00 Ex VAT
    £624.00 Inc VAT
    Keypart Price
    £468.00 Ex VAT
    £561.60 Inc VAT
    Special Order Usually 3 - 5 Days

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  • 826870-R - Volvo Penta MD21A Diesel Engine Circulation Pump Assembly
    826870-R
    Circulation Pump Assembly
    Keypart Price
    £625.00 Ex VAT
    £750.00 Inc VAT
    Please Contact for Stock Status

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Fuel System (Engine)

  • 3581078-R - Volvo Penta MD21A 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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  • 3581078 - Volvo Penta MD21A Diesel Engine Fuel Filter for CAV/Delphi 296 Pre-filter - Genuine
    3581078
    Fuel Filter for CAV/Delphi 296 Pre-filter - Genuine
    List Price
    £8.20 Ex VAT
    £9.84 Inc VAT
    Keypart Price
    £7.38 Ex VAT
    £8.86 Inc VAT
    In Stock

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  • 25534 - Volvo Penta MD21A Diesel Engine Washer - Vent Screw
    25534
    Washer - Vent Screw
    Keypart Price
    £0.35 Ex VAT
    £0.42 Inc VAT
    In Stock

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  • 48588-R - Volvo Penta MD21A Diesel Engine Washer - Fuel Lines (OD 15.8mm/ID 12.2mm/Thickness 1.15mm)
    48588-R
    Washer - Fuel Lines (OD 15.8mm/ID 12.2mm/Thickness 1.15mm)
    Keypart Price
    £0.59 Ex VAT
    £0.71 Inc VAT
    In Stock

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  • 957177-R - Volvo Penta MD21A Diesel Engine Washer - Fuel Lines (OD 17.8mm/ID 13.6mm/ Thickness 1.55mm)
    957177-R
    Washer - Fuel Lines (OD 17.8mm/ID 13.6mm/ Thickness 1.55mm)
    Keypart Price
    £0.36 Ex VAT
    £0.43 Inc VAT
    In Stock

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  • 858459-R - Volvo Penta MD21A Diesel Engine Fuel Lift Pump Assembly (No repair kits available for early Pumps)
    858459-R
    Fuel Lift Pump Assembly (No repair kits available for early Pumps)
    List Price
    £315.00 Ex VAT
    £378.00 Inc VAT
    Keypart Price
    £220.50 Ex VAT
    £264.60 Inc VAT
    Please Contact for Stock Status

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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.

  • 877767-R - Volvo Penta MD21A 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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  • 3581078-R - Volvo Penta MD21A 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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  • 3581078 - Volvo Penta MD21A Diesel Engine Fuel Filter for CAV/Delphi 296 Pre-filter - Genuine
    3581078
    Fuel Filter for CAV/Delphi 296 Pre-filter - Genuine
    List Price
    £8.20 Ex VAT
    £9.84 Inc VAT
    Keypart Price
    £7.38 Ex VAT
    £8.86 Inc VAT
    In Stock

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Electrical System

  • 19923 - Volvo Penta MD21A Diesel Engine 12V/2W Panel Light Bulb - White Bayonet Type - Genuine
    19923
    12V/2W Panel Light Bulb - White Bayonet Type - Genuine
    Keypart Price
    £1.50 Ex VAT
    £1.80 Inc VAT
    In Stock

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  • 873566 - Volvo Penta MD21A Diesel Engine Fuse Block - Genuine
    873566
    Fuse Block - Genuine
    List Price
    £14.70 Ex VAT
    £17.64 Inc VAT
    Keypart Price
    £13.23 Ex VAT
    £15.88 Inc VAT
    In Stock

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  • 829637 - Volvo Penta MD21A Diesel Engine Glow Plug Resistance - Genuine
    829637
    Glow Plug Resistance - Genuine
    List Price
    £68.40 Ex VAT
    £82.08 Inc VAT
    Keypart Price
    £61.56 Ex VAT
    £73.87 Inc VAT
    In Stock

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  • 1324750-R - Volvo Penta MD21A Diesel Engine Oil Pressure Switch - Replacement - for Warning Light
    1324750-R
    Oil Pressure Switch - Replacement - for Warning Light
    List Price
    £16.20 Ex VAT
    £19.44 Inc VAT
    Keypart Price
    £14.58 Ex VAT
    £17.50 Inc VAT
    In Stock

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  • 827151 - Volvo Penta MD21A Diesel Engine Temperature Sender for Gauge - Genuine
    827151
    Temperature Sender for Gauge - Genuine
    List Price
    £51.60 Ex VAT
    £61.92 Inc VAT
    Keypart Price
    £46.44 Ex VAT
    £55.73 Inc VAT
    In Stock

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  • 966920-R - Volvo Penta MD21A Diesel Engine Drive Belt - for Alternator
    966920-R
    Drive Belt - for Alternator
    List Price
    £14.70 Ex VAT
    £17.64 Inc VAT
    Keypart Price
    £11.76 Ex VAT
    £14.11 Inc VAT
    In Stock

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  • 873770-R - Volvo Penta MD21A Diesel Engine 14V/60A Alternator Assembly (Pulley NOT included)
    873770-R
    14V/60A Alternator Assembly (Pulley NOT included)
    List Price
    £359.00 Ex VAT
    £430.80 Inc VAT
    Keypart Price
    £235.00 Ex VAT
    £282.00 Inc VAT
    Low Stock

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  • 841811 - Volvo Penta MD21A Diesel Engine Alternator Pulley (Required when upgrading to 14V/60A) - Genuine
    841811
    Alternator Pulley (Required when upgrading to 14V/60A) - Genuine
    List Price
    £69.30 Ex VAT
    £83.16 Inc VAT
    Keypart Price
    £62.37 Ex VAT
    £74.84 Inc VAT
    In Stock

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Repair Kits

  • 876417-R - Volvo Penta MD21A Diesel Engine De-Coke Gasket Kit
    876417-R
    De-Coke Gasket Kit
    List Price
    £400.00 Ex VAT
    £480.00 Inc VAT
    Keypart Price
    £280.00 Ex VAT
    £336.00 Inc VAT
    In Stock

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  • 875383-R - Volvo Penta MD21A Diesel Engine Seawater Pump Repair Kit - for Key Drive Pump
    875383-R
    Seawater Pump Repair Kit - for Key Drive Pump
    List Price
    £166.67 Ex VAT
    £200.00 Inc VAT
    Keypart Price
    £100.00 Ex VAT
    £120.00 Inc VAT
    In Stock

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  • 36-2 - Volvo Penta MD21A Diesel Engine Seawater Pump Seal Kit
    36-2
    Seawater Pump Seal Kit
    List Price
    £10.70 Ex VAT
    £12.84 Inc VAT
    Keypart Price
    £8.56 Ex VAT
    £10.27 Inc VAT
    In Stock

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  • 36-6 - Volvo Penta MD21A Diesel Engine Oil Cooler Seal Kit
    36-6
    Oil Cooler Seal Kit
    List Price
    £4.61 Ex VAT
    £5.53 Inc VAT
    Keypart Price
    £3.46 Ex VAT
    £4.15 Inc VAT
    In Stock

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  • 36-17 - Volvo Penta MD21A 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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  • 803762-R - Volvo Penta MD21A Diesel Engine Rubber Element for Volvo Flexible Coupling (4 or 6 required)
    803762-R
    Rubber Element for Volvo Flexible Coupling (4 or 6 required)
    List Price
    £40.40 Ex VAT
    £48.48 Inc VAT
    Keypart Price
    £32.32 Ex VAT
    £38.78 Inc VAT
    In Stock

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Zinc Shaft Clamp Anodes - Seawater Use

  • 800500ZN - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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 - Volvo Penta MD21A 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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MD21A Diesel Engine