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4.3L EFI Petrol Engine Parts

A serial number between the range of 0L619000 - 0M322780

Service Items

  • 18-7879-1 - Mercruiser 4.3L EFI Petrol Engine Parts Oil Filter - Replacement - - not for Remote Mounting
    18-7879-1
    Oil Filter - Replacement - - not for Remote Mounting
    Keypart Price
    £12.36 (inc VAT)
    £10.30 (ex VAT)
    List Price
    £15.46 (inc VAT)
    £12.88 (ex VAT)
    In Stock

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  • 35-883702Q - Mercruiser 4.3L EFI Petrol Engine Parts Oil Filter - Genuine - - not for Remote Mounting
    35-883702Q
    Oil Filter - Genuine - - not for Remote Mounting
    Keypart Price
    £13.91 (inc VAT)
    £11.59 (ex VAT)
    List Price
    £15.46 (inc VAT)
    £12.88 (ex VAT)
    Low Stock

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  • 18-7824-2 - Mercruiser 4.3L EFI Petrol Engine Parts Oil Filter - Replacement - - for Remote Mounting
    18-7824-2
    Oil Filter - Replacement - - for Remote Mounting
    Keypart Price
    £12.40 (inc VAT)
    £10.33 (ex VAT)
    List Price
    £17.71 (inc VAT)
    £14.76 (ex VAT)
    Low Stock

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  • 18-7824C-1 - Mercruiser 4.3L EFI Petrol Engine Parts Oil Filter - Chrome - Replacement - - for Remote Mounting
    18-7824C-1
    Oil Filter - Chrome - Replacement - - for Remote Mounting
    Keypart Price
    £16.32 (inc VAT)
    £13.60 (ex VAT)
    List Price
    £20.40 (inc VAT)
    £17.00 (ex VAT)
    In Stock

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  • 35-866340Q03 - Mercruiser 4.3L EFI Petrol Engine Parts Oil Filter - Genuine - - for Remote Mounting
    35-866340Q03
    Oil Filter - Genuine - - for Remote Mounting
    Keypart Price
    £15.94 (inc VAT)
    £13.28 (ex VAT)
    List Price
    £17.71 (inc VAT)
    £14.76 (ex VAT)
    In Stock

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  • 27-827154 - Mercruiser 4.3L EFI Petrol Engine Parts Rocker Cover Gasket - Plastic Covers - (2 required per engine)
    27-827154
    Rocker Cover Gasket - Plastic Covers - (2 required per engine)
    Keypart Price
    £73.31 (inc VAT)
    £61.09 (ex VAT)
    List Price
    £91.63 (inc VAT)
    £76.36 (ex VAT)
    In Stock

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  • 18-3879 - Mercruiser 4.3L EFI Petrol Engine Parts Cylinder Head Gasket - (2 required per engine)
    18-3879
    Cylinder Head Gasket - (2 required per engine)
    Keypart Price
    £49.81 (inc VAT)
    £41.51 (ex VAT)
    List Price
    £62.27 (inc VAT)
    £51.89 (ex VAT)
    In Stock

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  • 3855807-R - Mercruiser 4.3L EFI Petrol Engine Parts Intake Manifold Gasket Kit
    3855807-R
    Intake Manifold Gasket Kit
    Keypart Price
    £64.80 (inc VAT)
    £54.00 (ex VAT)
    List Price
    £86.40 (inc VAT)
    £72.00 (ex VAT)
    In Stock

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  • 18-6457 - Mercruiser 4.3L EFI Petrol Engine Parts Idler Pulley for Serpentine Belt - 3" Diameter - with Grooves & Lip
    18-6457
    Idler Pulley for Serpentine Belt - 3" Diameter - with Grooves & Lip
    Keypart Price
    £63.14 (inc VAT)
    £52.62 (ex VAT)
    List Price
    £78.94 (inc VAT)
    £65.78 (ex VAT)
    In Stock

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Lubricants

Engine oil capacity is approximately 4.2 Litres

  • 18-9400-4 - Mercruiser 4.3L EFI Petrol Engine Parts 25W/40 Engine Oil 4.7 Litre (Not available to customers outside the UK)
    18-9400-4
    25W/40 Engine Oil 4.7 Litre (Not available to customers outside the UK)
    Keypart Price
    £48.41 (inc VAT)
    £40.34 (ex VAT)
    List Price
    £60.52 (inc VAT)
    £50.43 (ex VAT)
    Low Stock

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  • 92-8M0086227 - Mercruiser 4.3L EFI Petrol Engine Parts 25W/40 Synthetic Blend Oil 4L - Genuine Quicksilver (Not available to customers outside the UK)
    92-8M0086227
    25W/40 Synthetic Blend Oil 4L - Genuine Quicksilver (Not available to customers outside the UK)
    Keypart Price
    £58.31 (inc VAT)
    £48.59 (ex VAT)
    In Stock

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  • 33799-0000 - Mercruiser 4.3L EFI Petrol Engine Parts Oil Change Pump Kit (Universal)
    33799-0000
    Oil Change Pump Kit (Universal)
    Keypart Price
    £78.00 (inc VAT)
    £65.00 (ex VAT)
    List Price
    £90.00 (inc VAT)
    £75.00 (ex VAT)
    Please Contact for Stock Status

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  • 92-858074QB1 - Mercruiser 4.3L EFI Petrol Engine Parts Power Trim & Tilt Fluid - 8oz/237ml
    92-858074QB1
    Power Trim & Tilt Fluid - 8oz/237ml
    Keypart Price
    £9.53 (inc VAT)
    £7.94 (ex VAT)
    List Price
    £10.58 (inc VAT)
    £8.82 (ex VAT)
    In Stock

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Exhaust Manifold Kits

This kit will NOT directly replace the one-piece manifold system. Additional items will be required. Please conteact KEYPART for further information.

  • KP-Manifold-Set-7 - Mercruiser 4.3L EFI Petrol Engine Parts Manifold & Riser Kit with 4" outlet Risers - Engine Set - Replacement - * (See note above)
    KP-Manifold-Set-7
    Manifold & Riser Kit with 4" outlet Risers - Engine Set - Replacement - * (See note above)
    Keypart Price
    £660.00 (inc VAT)
    £550.00 (ex VAT)
    List Price
    £780.00 (inc VAT)
    £650.00 (ex VAT)
    In Stock

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  • 18-1908K - Mercruiser 4.3L EFI Petrol Engine Parts 3" Spacer Kit for Centre Rise Manifold
    18-1908K
    3" Spacer Kit for Centre Rise Manifold
    Keypart Price
    £399.01 (inc VAT)
    £332.51 (ex VAT)
    In Stock

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  • 93322A12 - Mercruiser 4.3L EFI Petrol Engine Parts 6" Spacer Kit for Centre Rise Manifold
    93322A12
    6" Spacer Kit for Centre Rise Manifold
    Keypart Price
    £444.00 (inc VAT)
    £370.00 (ex VAT)
    List Price
    £797.06 (inc VAT)
    £664.22 (ex VAT)
    Special Order Usually 3 - 5 Days

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Cooling System

Please Note: One-piece Exhaust Manifolds are no longer available. Please contact us for replacement information.

  • 18-3648 - Mercruiser 4.3L EFI Petrol Engine Parts Thermostat Kit 160 deg
    18-3648
    Thermostat Kit 160 deg
    Keypart Price
    £45.05 (inc VAT)
    £37.54 (ex VAT)
    List Price
    £64.36 (inc VAT)
    £53.63 (ex VAT)
    In Stock

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  • 23-806922 - Mercruiser 4.3L EFI Petrol Engine Parts Thermostat Sleeve
    23-806922
    Thermostat Sleeve
    Keypart Price
    £19.27 (inc VAT)
    £16.06 (ex VAT)
    List Price
    £24.08 (inc VAT)
    £20.07 (ex VAT)
    In Stock

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  • 18-4224 - Mercruiser 4.3L EFI Petrol Engine Parts Drain Elbow Assy with Blue Plastic Tap
    18-4224
    Drain Elbow Assy with Blue Plastic Tap
    Keypart Price
    £20.86 (inc VAT)
    £17.38 (ex VAT)
    List Price
    £41.70 (inc VAT)
    £34.75 (ex VAT)
    In Stock

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  • 18-4226 - Mercruiser 4.3L EFI Petrol Engine Parts Drain Tap - Blue Plastic
    18-4226
    Drain Tap - Blue Plastic
    Keypart Price
    £8.28 (inc VAT)
    £6.90 (ex VAT)
    List Price
    £10.36 (inc VAT)
    £8.63 (ex VAT)
    In Stock

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  • 18-3599-2 - Mercruiser 4.3L EFI Petrol Engine Parts Circulation Pump Assembly - ** VALUE ITEM **
    18-3599-2
    Circulation Pump Assembly - ** VALUE ITEM **
    Keypart Price
    £108.00 (inc VAT)
    £90.00 (ex VAT)
    List Price
    £181.20 (inc VAT)
    £151.00 (ex VAT)
    In Stock

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  • 18-1952-1 - Mercruiser 4.3L EFI Petrol Engine Parts High Quality Exhaust Manifold Kit (including Gaskets) 2 required per engine - Replacement
    18-1952-1
    High Quality Exhaust Manifold Kit (including Gaskets) 2 required per engine - Replacement
    Keypart Price
    £210.00 (inc VAT)
    £175.00 (ex VAT)
    List Price
    £280.49 (inc VAT)
    £233.74 (ex VAT)
    In Stock

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  • 18-1976-2 - Mercruiser 4.3L EFI Petrol Engine Parts High Quality 4" OD Exhaust Riser Kit (including Gasket) 2 required per engine - Replacement
    18-1976-2
    High Quality 4" OD Exhaust Riser Kit (including Gasket) 2 required per engine - Replacement
    Keypart Price
    £210.00 (inc VAT)
    £175.00 (ex VAT)
    List Price
    £328.34 (inc VAT)
    £273.62 (ex VAT)
    In Stock

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  • 18-1908K - Mercruiser 4.3L EFI Petrol Engine Parts 3" Spacer Kit for Centre Rise Manifold
    18-1908K
    3" Spacer Kit for Centre Rise Manifold
    Keypart Price
    £399.01 (inc VAT)
    £332.51 (ex VAT)
    In Stock

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  • 93322A12 - Mercruiser 4.3L EFI Petrol Engine Parts 6" Spacer Kit for Centre Rise Manifold
    93322A12
    6" Spacer Kit for Centre Rise Manifold
    Keypart Price
    £444.00 (inc VAT)
    £370.00 (ex VAT)
    List Price
    £797.06 (inc VAT)
    £664.22 (ex VAT)
    Special Order Usually 3 - 5 Days

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  • 18-2909 - Mercruiser 4.3L EFI Petrol Engine Parts Exhaust Manifold to Head Gasket (2 required per engine)
    18-2909
    Exhaust Manifold to Head Gasket (2 required per engine)
    Keypart Price
    £10.15 (inc VAT)
    £8.46 (ex VAT)
    List Price
    £11.28 (inc VAT)
    £9.40 (ex VAT)
    In Stock

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  • 18-0897 - Mercruiser 4.3L EFI Petrol Engine Parts Exhaust Riser to Manifold Gasket (2 required per engine)
    18-0897
    Exhaust Riser to Manifold Gasket (2 required per engine)
    Keypart Price
    £16.99 (inc VAT)
    £14.16 (ex VAT)
    List Price
    £20.84 (inc VAT)
    £17.37 (ex VAT)
    In Stock

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  • 807166A1 - Mercruiser 4.3L EFI Petrol Engine Parts Exhaust Shutter - (2 required per engine)
    807166A1
    Exhaust Shutter - (2 required per engine)
    Keypart Price
    £58.49 (inc VAT)
    £48.74 (ex VAT)
    List Price
    £116.96 (inc VAT)
    £97.47 (ex VAT)
    In Stock

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  • 18-2748 - Mercruiser 4.3L EFI Petrol Engine Parts Upper Exhaust Riser to Downpipe Bellows 4" ID - (2 required per engine)
    18-2748
    Upper Exhaust Riser to Downpipe Bellows 4" ID - (2 required per engine)
    Keypart Price
    £94.81 (inc VAT)
    £79.01 (ex VAT)
    List Price
    £126.42 (inc VAT)
    £105.35 (ex VAT)
    In Stock

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  • 18-2746 - Mercruiser 4.3L EFI Petrol Engine Parts Lower Exhaust Riser to Downpipe Bellows 4" ID - (2 required per engine)
    18-2746
    Lower Exhaust Riser to Downpipe Bellows 4" ID - (2 required per engine)
    Keypart Price
    £74.70 (inc VAT)
    £62.25 (ex VAT)
    List Price
    £99.60 (inc VAT)
    £83.00 (ex VAT)
    Low Stock

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  • 18-15101 - Mercruiser 4.3L EFI Petrol Engine Parts Serpentine Belt - for Alpha Spec with Power Steering
    18-15101
    Serpentine Belt - for Alpha Spec with Power Steering
    Keypart Price
    £78.22 (inc VAT)
    £65.18 (ex VAT)
    List Price
    £104.28 (inc VAT)
    £86.90 (ex VAT)
    In Stock

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Bravo Specification Components Note: Sea-water Pump mounted on the Engine and NOT in the Sterndrive

  • 18-3087 - Mercruiser 4.3L EFI Petrol Engine Parts Sea-water Pump Impeller
    18-3087
    Sea-water Pump Impeller
    Keypart Price
    £30.48 (inc VAT)
    £25.40 (ex VAT)
    List Price
    £38.10 (inc VAT)
    £31.75 (ex VAT)
    In Stock

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  • 18-3237 - Mercruiser 4.3L EFI Petrol Engine Parts Impeller Repair Kit for 1-piece Plastic Body
    18-3237
    Impeller Repair Kit for 1-piece Plastic Body
    Keypart Price
    £77.03 (inc VAT)
    £64.19 (ex VAT)
    List Price
    £96.29 (inc VAT)
    £80.24 (ex VAT)
    In Stock

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  • 18-3150 - Mercruiser 4.3L EFI Petrol Engine Parts Sea-water Pump Repair Kit with Housing
    18-3150
    Sea-water Pump Repair Kit with Housing
    Keypart Price
    £111.25 (inc VAT)
    £92.71 (ex VAT)
    List Price
    £139.07 (inc VAT)
    £115.89 (ex VAT)
    In Stock

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  • 18-15115 - Mercruiser 4.3L EFI Petrol Engine Parts Serpentine Belt - for Bravo Spec with Power Steering
    18-15115
    Serpentine Belt - for Bravo Spec with Power Steering
    Keypart Price
    £109.64 (inc VAT)
    £91.37 (ex VAT)
    List Price
    £137.06 (inc VAT)
    £114.22 (ex VAT)
    Low Stock

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Fuel System (Engine)

  • 18-7944 - Mercruiser 4.3L EFI Petrol Engine Parts Fuel Filter (10 Micron) - Replacement -100mm (3-15/16") Long
    18-7944
    Fuel Filter (10 Micron) - Replacement -100mm (3-15/16") Long
    Keypart Price
    £11.45 (inc VAT)
    £9.54 (ex VAT)
    List Price
    £14.30 (inc VAT)
    £11.92 (ex VAT)
    In Stock

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  • 18-7945 - Mercruiser 4.3L EFI Petrol Engine Parts 10-Micron Fuel Filter - Replacement - 110mm (4-3/8") Long
    18-7945
    10-Micron Fuel Filter - Replacement - 110mm (4-3/8") Long
    Keypart Price
    £11.45 (inc VAT)
    £9.54 (ex VAT)
    List Price
    £14.30 (inc VAT)
    £11.92 (ex VAT)
    Low Stock

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  • 35-802893Q01 - Mercruiser 4.3L EFI Petrol Engine Parts 25-Micron Fuel Filter - Spin On - Genuine
    35-802893Q01
    25-Micron Fuel Filter - Spin On - Genuine
    Keypart Price
    £12.88 (inc VAT)
    £10.73 (ex VAT)
    List Price
    £14.30 (inc VAT)
    £11.92 (ex VAT)
    In Stock

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  • 18-7630 - Mercruiser 4.3L EFI Petrol Engine Parts Throttle Position Sensor
    18-7630
    Throttle Position Sensor
    Keypart Price
    £170.10 (inc VAT)
    £141.75 (ex VAT)
    List Price
    £212.63 (inc VAT)
    £177.19 (ex VAT)
    In Stock

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  • 18-7550 - Mercruiser 4.3L EFI Petrol Engine Parts Map Sensor
    18-7550
    Map Sensor
    Keypart Price
    £170.70 (inc VAT)
    £142.25 (ex VAT)
    List Price
    £243.86 (inc VAT)
    £203.22 (ex VAT)
    In Stock

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  • 18-7553 - Mercruiser 4.3L EFI Petrol Engine Parts Knock Sensor
    18-7553
    Knock Sensor
    Keypart Price
    £82.16 (inc VAT)
    £68.47 (ex VAT)
    List Price
    £91.30 (inc VAT)
    £76.08 (ex VAT)
    Special Order Usually 7 - 9 Days

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  • 18-33800 - Mercruiser 4.3L EFI Petrol Engine Parts PCV Valve
    18-33800
    PCV Valve
    Keypart Price
    £33.08 (inc VAT)
    £27.57 (ex VAT)
    List Price
    £41.35 (inc VAT)
    £34.46 (ex VAT)
    Special Order Usually 7 - 9 Days

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  • 18-35433 - Mercruiser 4.3L EFI Petrol Engine Parts Electric Fuel Pump - Replacement - ONE end threaded, push-fit on the other.
    18-35433
    Electric Fuel Pump - Replacement - ONE end threaded, push-fit on the other.
    Keypart Price
    £327.00 (inc VAT)
    £272.50 (ex VAT)
    List Price
    £363.34 (inc VAT)
    £302.78 (ex VAT)
    In Stock

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  • 18-8867 - Mercruiser 4.3L EFI Petrol Engine Parts Electric Fuel Pump Kit (Includes Bracket - not shown) Threaded on both ends.
    18-8867
    Electric Fuel Pump Kit (Includes Bracket - not shown) Threaded on both ends.
    Keypart Price
    £327.00 (inc VAT)
    £272.50 (ex VAT)
    List Price
    £363.34 (inc VAT)
    £302.78 (ex VAT)
    In Stock

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  • 18-7685 - Mercruiser 4.3L EFI Petrol Engine Parts Throttle Body Injector (2 required per engine)
    18-7685
    Throttle Body Injector (2 required per engine)
    Keypart Price
    £304.62 (inc VAT)
    £253.85 (ex VAT)
    List Price
    £507.60 (inc VAT)
    £423.00 (ex VAT)
    Special Order Usually 7 - 9 Days

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  • 3858941 - Mercruiser 4.3L EFI Petrol Engine Parts Injector Overhaul Kit - Genuine - ONE Only (2 required per engine)
    3858941
    Injector Overhaul Kit - Genuine - ONE Only (2 required per engine)
    Keypart Price
    £493.56 (inc VAT)
    £411.30 (ex VAT)
    List Price
    £548.40 (inc VAT)
    £457.00 (ex VAT)
    Please Contact for Stock Status

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  • 18-7632-1 - Mercruiser 4.3L EFI Petrol Engine Parts Idle Air Control Motor - Replacement
    18-7632-1
    Idle Air Control Motor - Replacement
    Keypart Price
    £94.93 (inc VAT)
    £79.11 (ex VAT)
    List Price
    £105.48 (inc VAT)
    £87.90 (ex VAT)
    In Stock

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  • 807952A1 - Mercruiser 4.3L EFI Petrol Engine Parts Fuel Pressure Regulator Kit (Mounted on Fuel Cooler) - Genuine
    807952A1
    Fuel Pressure Regulator Kit (Mounted on Fuel Cooler) - Genuine
    Keypart Price
    £214.07 (inc VAT)
    £178.39 (ex VAT)
    List Price
    £237.85 (inc VAT)
    £198.21 (ex VAT)
    Please Contact for Stock Status

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  • 92-8M0079745 - Mercruiser 4.3L EFI Petrol Engine Parts Quickstor Fuel Stabiliser - 355ml (12oz) - Genuine - - Treats approx 50 Imperial Gallons
    92-8M0079745
    Quickstor Fuel Stabiliser - 355ml (12oz) - Genuine - - Treats approx 50 Imperial Gallons
    Keypart Price
    £23.50 (inc VAT)
    £19.58 (ex VAT)
    In Stock

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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.

  • 18-7848-1 - Mercruiser 4.3L EFI Petrol Engine Parts Fuel Filter Kit with 1/4" Ports - Aluminium Head (Short Filter) 21 micron for Bulkhead Mounting
    18-7848-1
    Fuel Filter Kit with 1/4" Ports - Aluminium Head (Short Filter) 21 micron for Bulkhead Mounting
    Keypart Price
    £36.00 (inc VAT)
    £30.00 (ex VAT)
    List Price
    £48.00 (inc VAT)
    £40.00 (ex VAT)
    Please Contact for Stock Status

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  • 18-8074 - Mercruiser 4.3L EFI Petrol Engine Parts Barbed Hose Tail for 3/8" ID Hose for Fuel Filter Assembly - Straight
    18-8074
    Barbed Hose Tail for 3/8" ID Hose for Fuel Filter Assembly - Straight
    Keypart Price
    £7.20 (inc VAT)
    £6.00 (ex VAT)
    List Price
    £9.60 (inc VAT)
    £8.00 (ex VAT)
    In Stock

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  • 18-8067 - Mercruiser 4.3L EFI Petrol Engine Parts Barbed Hose Tail for 3/8" ID Hose for Fuel Filter Assembly - 90 Deg
    18-8067
    Barbed Hose Tail for 3/8" ID Hose for Fuel Filter Assembly - 90 Deg
    Keypart Price
    £9.60 (inc VAT)
    £8.00 (ex VAT)
    List Price
    £12.00 (inc VAT)
    £10.00 (ex VAT)
    In Stock

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  • 18-7944 - Mercruiser 4.3L EFI Petrol Engine Parts Fuel Filter (10 Micron) - Replacement -100mm (3-15/16") Long - - for Bulkhead Mounting
    18-7944
    Fuel Filter (10 Micron) - Replacement -100mm (3-15/16") Long - - for Bulkhead Mounting
    Keypart Price
    £11.45 (inc VAT)
    £9.54 (ex VAT)
    List Price
    £14.30 (inc VAT)
    £11.92 (ex VAT)
    In Stock

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  • 18-7945 - Mercruiser 4.3L EFI Petrol Engine Parts 10-Micron Fuel Filter - Replacement - 110mm (4-3/8") Long - - for Bulkhead Mounting
    18-7945
    10-Micron Fuel Filter - Replacement - 110mm (4-3/8") Long - - for Bulkhead Mounting
    Keypart Price
    £11.45 (inc VAT)
    £9.54 (ex VAT)
    List Price
    £14.30 (inc VAT)
    £11.92 (ex VAT)
    Low Stock

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  • 35-802893Q01 - Mercruiser 4.3L EFI Petrol Engine Parts 25-Micron Fuel Filter - Spin On - Genuine - - for Bulkhead Mounting
    35-802893Q01
    25-Micron Fuel Filter - Spin On - Genuine - - for Bulkhead Mounting
    Keypart Price
    £12.88 (inc VAT)
    £10.73 (ex VAT)
    List Price
    £14.30 (inc VAT)
    £11.92 (ex VAT)
    In Stock

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Ignition System

  • BPR6EFS - Mercruiser 4.3L EFI Petrol Engine Parts Spark Plug - (6 required per engine)
    BPR6EFS
    Spark Plug - (6 required per engine)
    Keypart Price
    £3.72 (inc VAT)
    £3.10 (ex VAT)
    List Price
    £7.44 (inc VAT)
    £6.20 (ex VAT)
    Low Stock

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  • 18-5396 - Mercruiser 4.3L EFI Petrol Engine Parts Distributor Cap - Thunderbolt
    18-5396
    Distributor Cap - Thunderbolt
    Keypart Price
    £50.21 (inc VAT)
    £41.84 (ex VAT)
    List Price
    £62.76 (inc VAT)
    £52.30 (ex VAT)
    In Stock

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  • 18-5432 - Mercruiser 4.3L EFI Petrol Engine Parts Rotor/Trigger Assembly - Thunderbolt
    18-5432
    Rotor/Trigger Assembly - Thunderbolt
    Keypart Price
    £12.59 (inc VAT)
    £10.49 (ex VAT)
    In Stock

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  • 18-5116-1 - Mercruiser 4.3L EFI Petrol Engine Parts Distributor Ignition Sensor - Thunderbolt
    18-5116-1
    Distributor Ignition Sensor - Thunderbolt
    Keypart Price
    £98.71 (inc VAT)
    £82.26 (ex VAT)
    List Price
    £109.68 (inc VAT)
    £91.40 (ex VAT)
    In Stock

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  • 18-5438 - Mercruiser 4.3L EFI Petrol Engine Parts Ignition Coil - Replacement - - Thunderbolt
    18-5438
    Ignition Coil - Replacement - - Thunderbolt
    Keypart Price
    £76.76 (inc VAT)
    £63.97 (ex VAT)
    List Price
    £109.67 (inc VAT)
    £91.39 (ex VAT)
    Low Stock

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  • 18-8810-1 - Mercruiser 4.3L EFI Petrol Engine Parts H T Lead Set - - Thunderbolt
    18-8810-1
    H T Lead Set - - Thunderbolt
    Keypart Price
    £71.64 (inc VAT)
    £59.70 (ex VAT)
    List Price
    £89.56 (inc VAT)
    £74.63 (ex VAT)
    In Stock

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  • 18-5471 - Mercruiser 4.3L EFI Petrol Engine Parts V6 Distributor Assembly Thunderbolt IV
    18-5471
    V6 Distributor Assembly Thunderbolt IV
    Keypart Price
    £388.46 (inc VAT)
    £323.72 (ex VAT)
    List Price
    £485.58 (inc VAT)
    £404.65 (ex VAT)
    In Stock

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  • 18-28175 - Mercruiser 4.3L EFI Petrol Engine Parts HT Lead Marker Set numbered 1 to 8
    18-28175
    HT Lead Marker Set numbered 1 to 8
    Keypart Price
    £10.80 (inc VAT)
    £9.00 (ex VAT)
    List Price
    £13.20 (inc VAT)
    £11.00 (ex VAT)
    Please Contact for Stock Status

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  • 18-28150 - Mercruiser 4.3L EFI Petrol Engine Parts HT Lead Wire Separator Kit - Blue
    18-28150
    HT Lead Wire Separator Kit - Blue
    Keypart Price
    £10.80 (inc VAT)
    £9.00 (ex VAT)
    List Price
    £13.20 (inc VAT)
    £11.00 (ex VAT)
    In Stock

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  • 18-28151 - Mercruiser 4.3L EFI Petrol Engine Parts HT Lead Wire Separator Kit - Black
    18-28151
    HT Lead Wire Separator Kit - Black
    Keypart Price
    £10.80 (inc VAT)
    £9.00 (ex VAT)
    List Price
    £13.20 (inc VAT)
    £11.00 (ex VAT)
    In Stock

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Electrical System

  • 18-6275-1 - Mercruiser 4.3L EFI Petrol Engine Parts Marine Starter Motor Assembly - Heavy Duty with Water Drain
    18-6275-1
    Marine Starter Motor Assembly - Heavy Duty with Water Drain
    Keypart Price
    £174.00 (inc VAT)
    £145.00 (ex VAT)
    List Price
    £343.20 (inc VAT)
    £286.00 (ex VAT)
    In Stock

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  • 18-6293 - Mercruiser 4.3L EFI Petrol Engine Parts Alternator - 70 Amp Serpentine Belt - 2.44" Pulley
    18-6293
    Alternator - 70 Amp Serpentine Belt - 2.44" Pulley
    Keypart Price
    £252.00 (inc VAT)
    £210.00 (ex VAT)
    List Price
    £599.50 (inc VAT)
    £499.58 (ex VAT)
    Special Order Usually 3 - 5 Days

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  • 18-5817 - Mercruiser 4.3L EFI Petrol Engine Parts Solenoid Kit - Curved Bracket - Replacement - (Slave for Starter motor)
    18-5817
    Solenoid Kit - Curved Bracket - Replacement - (Slave for Starter motor)
    Keypart Price
    £37.66 (inc VAT)
    £31.38 (ex VAT)
    List Price
    £47.06 (inc VAT)
    £39.22 (ex VAT)
    In Stock

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  • 18-5897 - Mercruiser 4.3L EFI Petrol Engine Parts Temperature Sender 3/8"-18 - Spanner Size 11/16" - 1-1/2" Long
    18-5897
    Temperature Sender 3/8"-18 - Spanner Size 11/16" - 1-1/2" Long
    Keypart Price
    £37.46 (inc VAT)
    £31.22 (ex VAT)
    List Price
    £46.82 (inc VAT)
    £39.02 (ex VAT)
    In Stock

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  • 18-5899 - Mercruiser 4.3L EFI Petrol Engine Parts Oil Pressure Sender
    18-5899
    Oil Pressure Sender
    Keypart Price
    £61.92 (inc VAT)
    £51.60 (ex VAT)
    List Price
    £77.22 (inc VAT)
    £64.35 (ex VAT)
    In Stock

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  • 87-864252A01 - Mercruiser 4.3L EFI Petrol Engine Parts Oil Pressure Switch for Fuel Pump Cut-out
    87-864252A01
    Oil Pressure Switch for Fuel Pump Cut-out
    Keypart Price
    £49.34 (inc VAT)
    £41.12 (ex VAT)
    List Price
    £58.06 (inc VAT)
    £48.38 (ex VAT)
    In Stock

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  • 18-7600 - Mercruiser 4.3L EFI Petrol Engine Parts Temperature Switch
    18-7600
    Temperature Switch
    Keypart Price
    £65.77 (inc VAT)
    £54.81 (ex VAT)
    List Price
    £93.96 (inc VAT)
    £78.30 (ex VAT)
    In Stock

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  • 3854164-R - Mercruiser 4.3L EFI Petrol Engine Parts 50amp Reset Fuse Unit
    3854164-R
    50amp Reset Fuse Unit
    Keypart Price
    £107.52 (inc VAT)
    £89.60 (ex VAT)
    List Price
    £153.60 (inc VAT)
    £128.00 (ex VAT)
    In Stock

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  • 8M0092849 - Mercruiser 4.3L EFI Petrol Engine Parts Stop Switch Lanyard - Genuine
    8M0092849
    Stop Switch Lanyard - Genuine
    Keypart Price
    £19.42 (inc VAT)
    £16.18 (ex VAT)
    In Stock

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  • 18-8220 - Mercruiser 4.3L EFI Petrol Engine Parts Fuse Kit - 90Amp
    18-8220
    Fuse Kit - 90Amp
    Keypart Price
    £32.56 (inc VAT)
    £27.13 (ex VAT)
    List Price
    £40.69 (inc VAT)
    £33.91 (ex VAT)
    In Stock

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  • 87-805605A1 - Mercruiser 4.3L EFI Petrol Engine Parts Oil Pressure Switch for Alarm - Genuine
    87-805605A1
    Oil Pressure Switch for Alarm - Genuine
    Keypart Price
    £40.69 (inc VAT)
    £33.91 (ex VAT)
    List Price
    £45.22 (inc VAT)
    £37.68 (ex VAT)
    In Stock

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  • 48952 - Mercruiser 4.3L EFI Petrol Engine Parts Temperature Switch for Alarm - Genuine
    48952
    Temperature Switch for Alarm - Genuine
    Keypart Price
    £147.29 (inc VAT)
    £122.74 (ex VAT)
    List Price
    £163.66 (inc VAT)
    £136.38 (ex VAT)
    In Stock

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Repair Items

  • 18-2193 - Mercruiser 4.3L EFI Petrol Engine Parts Rear Engine Mount - (2 required per engine)
    18-2193
    Rear Engine Mount - (2 required per engine)
    Keypart Price
    £65.54 (inc VAT)
    £54.62 (ex VAT)
    List Price
    £131.08 (inc VAT)
    £109.23 (ex VAT)
    In Stock

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  • 18-2141 - Mercruiser 4.3L EFI Petrol Engine Parts Rear Engine Mount Bolt Kit - (2 required per engine)
    18-2141
    Rear Engine Mount Bolt Kit - (2 required per engine)
    Keypart Price
    £29.20 (inc VAT)
    £24.33 (ex VAT)
    List Price
    £36.49 (inc VAT)
    £30.41 (ex VAT)
    In Stock

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  • 809893T - Mercruiser 4.3L EFI Petrol Engine Parts Timing Cover with Seal - Plastic
    809893T
    Timing Cover with Seal - Plastic
    Keypart Price
    £188.66 (inc VAT)
    £157.22 (ex VAT)
    List Price
    £209.63 (inc VAT)
    £174.69 (ex VAT)
    Special Order Usually 7 - 9 Days

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  • 18-7508 - Mercruiser 4.3L EFI Petrol Engine Parts Power Steering Pump Assembly (NO Pulley) - Replacement
    18-7508
    Power Steering Pump Assembly (NO Pulley) - Replacement
    Keypart Price
    £546.00 (inc VAT)
    £455.00 (ex VAT)
    List Price
    £869.77 (inc VAT)
    £724.81 (ex VAT)
    In Stock

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  • 18-8297 - Mercruiser 4.3L EFI Petrol Engine Parts Pas Pump Pulley - Serpentine - Replacement
    18-8297
    Pas Pump Pulley - Serpentine - Replacement
    Keypart Price
    £146.41 (inc VAT)
    £122.01 (ex VAT)
    List Price
    £209.16 (inc VAT)
    £174.30 (ex VAT)
    In Stock

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  • 18-4516 - Mercruiser 4.3L EFI Petrol Engine Parts Flywheel Ring Gear For 14" GM Flywheel - Replacement (168 Teeth)
    18-4516
    Flywheel Ring Gear For 14" GM Flywheel - Replacement (168 Teeth)
    Keypart Price
    £126.00 (inc VAT)
    £105.00 (ex VAT)
    List Price
    £223.20 (inc VAT)
    £186.00 (ex VAT)
    In Stock

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Repair Kits

  • 27-14247T1 - Mercruiser 4.3L EFI Petrol Engine Parts Sump Gasket for Aluminium Sumps
    27-14247T1
    Sump Gasket for Aluminium Sumps
    Keypart Price
    £103.21 (inc VAT)
    £86.01 (ex VAT)
    List Price
    £147.44 (inc VAT)
    £122.87 (ex VAT)
    In Stock

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Bobtail Engines

Please note: Additional items may be required when replacing earlier engines. Please call KEYPART for additional information.

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.

  • 20.052 - Mercruiser 4.3L EFI Petrol Engine Parts Black Touch-up Paint 10ml (Shipping restrictions may apply)
    20.052
    Black Touch-up Paint 10ml (Shipping restrictions may apply)
    Keypart Price
    £4.20 (inc VAT)
    £3.50 (ex VAT)
    List Price
    £8.76 (inc VAT)
    £7.30 (ex VAT)
    In Stock

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  • LOCTITE-243-10ML - Mercruiser 4.3L EFI Petrol Engine Parts Loctite Threadlock 10ml
    LOCTITE-243-10ML
    Loctite Threadlock 10ml
    Keypart Price
    £25.20 (inc VAT)
    £21.00 (ex VAT)
    List Price
    £31.20 (inc VAT)
    £26.00 (ex VAT)
    Please Contact for Stock Status

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  • LOCTITE-243-50ML - Mercruiser 4.3L EFI Petrol Engine Parts Loctite Threadlock 50ml
    LOCTITE-243-50ML
    Loctite Threadlock 50ml
    Keypart Price
    £60.00 (inc VAT)
    £50.00 (ex VAT)
    List Price
    £72.00 (inc VAT)
    £60.00 (ex VAT)
    Please Contact for Stock Status

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  • 92-8M0079745 - Mercruiser 4.3L EFI Petrol Engine Parts Quickstor Fuel Stabiliser - 355ml (12oz) - Genuine - - Treats approx 50 Imperial Gallons
    92-8M0079745
    Quickstor Fuel Stabiliser - 355ml (12oz) - Genuine - - Treats approx 50 Imperial Gallons
    Keypart Price
    £23.50 (inc VAT)
    £19.58 (ex VAT)
    In Stock

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  • 92-8M0121972 - Mercruiser 4.3L EFI Petrol Engine Parts *AEROSOL* Fogging Oil Spray (12oz) 340gm - Genuine (for use when laying up) (Shipping restrictions apply - see above)
    92-8M0121972
    *AEROSOL* Fogging Oil Spray (12oz) 340gm - Genuine (for use when laying up) (Shipping restrictions apply - see above)
    Keypart Price
    £22.99 (inc VAT)
    £19.16 (ex VAT)
    List Price
    £25.55 (inc VAT)
    £21.29 (ex VAT)
    Low Stock

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Tools & Manuals

  • 18-03206 - Mercruiser 4.3L EFI Petrol Engine Parts Engine & Sterndrive Workshop Manual 1992-2001
    18-03206
    Engine & Sterndrive Workshop Manual 1992-2001
    Keypart Price
    £36.00 (inc VAT)
    £36.00 (ex VAT)
    List Price
    £41.00 (inc VAT)
    £41.00 (ex VAT)
    In Stock

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  • 18-03208 - Mercruiser 4.3L EFI Petrol Engine Parts Engine & Sterndrive Workshop Manual 2001-2013
    18-03208
    Engine & Sterndrive Workshop Manual 2001-2013
    Keypart Price
    £36.00 (inc VAT)
    £36.00 (ex VAT)
    List Price
    £41.00 (inc VAT)
    £41.00 (ex VAT)
    In Stock

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  • 33799-0000 - Mercruiser 4.3L EFI Petrol Engine Parts Oil Change Pump Kit (Universal)
    33799-0000
    Oil Change Pump Kit (Universal)
    Keypart Price
    £78.00 (inc VAT)
    £65.00 (ex VAT)
    List Price
    £90.00 (inc VAT)
    £75.00 (ex VAT)
    Please Contact for Stock Status

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Accessories

  • MP40970-1 - Mercruiser 4.3L EFI Petrol Engine Parts Safety Switch - Sierra Marine Works - Coiled Lanyard
    MP40970-1
    Safety Switch - Sierra Marine Works - Coiled Lanyard
    Keypart Price
    £31.20 (inc VAT)
    £26.00 (ex VAT)
    List Price
    £40.80 (inc VAT)
    £34.00 (ex VAT)
    In Stock

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  • UN77310 - Mercruiser 4.3L EFI Petrol Engine Parts Battery Master Switch - Sierra Marine Works - 12V/100A Continuous (12V/500A for 10 seconds)
    UN77310
    Battery Master Switch - Sierra Marine Works - 12V/100A Continuous (12V/500A for 10 seconds)
    Keypart Price
    £20.40 (inc VAT)
    £17.00 (ex VAT)
    List Price
    £28.80 (inc VAT)
    £24.00 (ex VAT)
    In Stock

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4.3L EFI Petrol Engine Parts