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4.3L MPI Petrol Engine Parts

A serial number between the range of 0M320025 - 0M614999

Manufactured between the years of 2003 - 2004

Service Items

  • 18-7824-2 - Mercruiser 4.3L MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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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Lubricants

Engine oil capacity is approximately 4.2 Litres

  • 18-9410-4 - Mercruiser 4.3L MPI Petrol Engine Parts SAE 30 Full Synthetic Engine Oil 4.7 Litre (Not available to customers outside the UK)
    18-9410-4
    SAE 30 Full Synthetic Engine Oil 4.7 Litre (Not available to customers outside the UK)
    Keypart Price
    £43.20 (inc VAT)
    £36.00 (ex VAT)
    List Price
    £124.08 (inc VAT)
    £103.40 (ex VAT)
    In Stock

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  • 92-8M0086227 - Mercruiser 4.3L MPI 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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  • 92-858074QB1 - Mercruiser 4.3L MPI 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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  • 33799-0000 - Mercruiser 4.3L MPI 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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Exhaust Manifold Kits

  • KP-Manifold-Set-7 - Mercruiser 4.3L MPI Petrol Engine Parts Manifold & Riser Kit with 4" outlet Risers - Engine Set - Replacement
    KP-Manifold-Set-7
    Manifold & Riser Kit with 4" outlet Risers - Engine Set - Replacement
    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 MPI 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 MPI 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

  • 18-3648 - Mercruiser 4.3L MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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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  • 864625T - Mercruiser 4.3L MPI Petrol Engine Parts Idler Pulley for Serpentine Belt - Genuine - 4.25" Diameter - with Grooves & Lip - (0M320025 & up)
    864625T
    Idler Pulley for Serpentine Belt - Genuine - 4.25" Diameter - with Grooves & Lip - (0M320025 & up)
    Keypart Price
    £88.88 (inc VAT)
    £74.07 (ex VAT)
    List Price
    £98.76 (inc VAT)
    £82.30 (ex VAT)
    In Stock

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

  • 18-3016-1 - Mercruiser 4.3L MPI Petrol Engine Parts Sea-water Pump Impeller
    18-3016-1
    Sea-water Pump Impeller
    Keypart Price
    £62.48 (inc VAT)
    £52.07 (ex VAT)
    List Price
    £83.32 (inc VAT)
    £69.43 (ex VAT)
    In Stock

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  • 18-15100 - Mercruiser 4.3L MPI Petrol Engine Parts Serpentine Belt - for Bravo Spec with Power Steering
    18-15100
    Serpentine Belt - for Bravo Spec with Power Steering
    Keypart Price
    £113.45 (inc VAT)
    £94.54 (ex VAT)
    List Price
    £141.80 (inc VAT)
    £118.17 (ex VAT)
    Low Stock

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  • Awaiting
    Image
    862776A01
    Sea-water Pump Rear Cover Housing Kit (Plastic) Genuine - NO Air Fittings
    Keypart Price
    £132.90 (inc VAT)
    £110.75 (ex VAT)
    List Price
    £147.66 (inc VAT)
    £123.05 (ex VAT)
    Please Contact for Stock Status

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Fuel System (Engine)

  • 18-7944 - Mercruiser 4.3L MPI 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 MPI 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 MPI 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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  • 18-7688 - Mercruiser 4.3L MPI Petrol Engine Parts Fuel Injector - (6 required per engine)
    18-7688
    Fuel Injector - (6 required per engine)
    Keypart Price
    £226.15 (inc VAT)
    £188.46 (ex VAT)
    List Price
    £282.70 (inc VAT)
    £235.58 (ex VAT)
    Special Order Usually 3 - 5 Days

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  • 18-7700 - Mercruiser 4.3L MPI Petrol Engine Parts Throttle Position Sensor
    18-7700
    Throttle Position Sensor
    Keypart Price
    £109.20 (inc VAT)
    £91.00 (ex VAT)
    List Price
    £156.00 (inc VAT)
    £130.00 (ex VAT)
    In Stock

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  • 861126A1 - Mercruiser 4.3L MPI Petrol Engine Parts Fuel Pressure Regulator mounted on Fuel Cooler (Blue/Green mark)
    861126A1
    Fuel Pressure Regulator mounted on Fuel Cooler (Blue/Green mark)
    Keypart Price
    £187.79 (inc VAT)
    £156.49 (ex VAT)
    List Price
    £208.66 (inc VAT)
    £173.88 (ex VAT)
    In Stock

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  • 18-33800 - Mercruiser 4.3L MPI 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 MPI 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 MPI 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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  • 18-7701 - Mercruiser 4.3L MPI Petrol Engine Parts Idle Air Control Valve
    18-7701
    Idle Air Control Valve
    Keypart Price
    £230.22 (inc VAT)
    £191.85 (ex VAT)
    List Price
    £328.88 (inc VAT)
    £274.07 (ex VAT)
    In Stock

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  • 92-8M0079745 - Mercruiser 4.3L MPI 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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  • 35-863829 - Mercruiser 4.3L MPI Petrol Engine Parts Sponge Muffler for Throttle Body - Genuine
    35-863829
    Sponge Muffler for Throttle Body - Genuine
    Keypart Price
    £3.07 (inc VAT)
    £2.56 (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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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

  • PTR5D-13 - Mercruiser 4.3L MPI Petrol Engine Parts Spark Plug - (6 required per engine)
    PTR5D-13
    Spark Plug - (6 required per engine)
    Keypart Price
    £9.60 (inc VAT)
    £8.00 (ex VAT)
    List Price
    £22.03 (inc VAT)
    £18.36 (ex VAT)
    Low Stock

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  • Awaiting
    Image
    18-5350
    Distributor Assembly - Delco HEI
    Keypart Price
    £360.00 (inc VAT)
    £300.00 (ex VAT)
    List Price
    £494.02 (inc VAT)
    £411.68 (ex VAT)
    Please Contact for Stock Status

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  • 18-5243 - Mercruiser 4.3L MPI Petrol Engine Parts Distributor Cap - Delco HEI
    18-5243
    Distributor Cap - Delco HEI
    Keypart Price
    £103.61 (inc VAT)
    £86.34 (ex VAT)
    List Price
    £148.02 (inc VAT)
    £123.35 (ex VAT)
    In Stock

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  • 18-5245 - Mercruiser 4.3L MPI Petrol Engine Parts Rotor Arm - Delco HEI
    18-5245
    Rotor Arm - Delco HEI
    Keypart Price
    £42.74 (inc VAT)
    £35.62 (ex VAT)
    List Price
    £53.42 (inc VAT)
    £44.52 (ex VAT)
    In Stock

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  • 18-8829-1 - Mercruiser 4.3L MPI Petrol Engine Parts H T Lead Set
    18-8829-1
    H T Lead Set
    Keypart Price
    £131.30 (inc VAT)
    £109.42 (ex VAT)
    List Price
    £164.12 (inc VAT)
    £136.77 (ex VAT)
    In Stock

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  • Awaiting
    Image
    3861985
    Ignition Coil - Delco HEI - Replacement
    Keypart Price
    £228.96 (inc VAT)
    £190.80 (ex VAT)
    List Price
    £254.40 (inc VAT)
    £212.00 (ex VAT)
    In Stock

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  • 18-28175 - Mercruiser 4.3L MPI 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 MPI 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 MPI 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 MPI 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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  • 18-6298 - Mercruiser 4.3L MPI Petrol Engine Parts Alternator - 70 Amp Serpentine Belt - 1.97" Pulley
    18-6298
    Alternator - 70 Amp Serpentine Belt - 1.97" Pulley
    Keypart Price
    £263.46 (inc VAT)
    £219.55 (ex VAT)
    List Price
    £292.74 (inc VAT)
    £243.95 (ex VAT)
    In Stock

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  • 18-5817 - Mercruiser 4.3L MPI 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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  • 18-5899 - Mercruiser 4.3L MPI 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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  • 18-7600 - Mercruiser 4.3L MPI 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 MPI 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 MPI 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 MPI 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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  • Awaiting
    Image
    8M6000623-R
    Water Pressure Sensor - Replacement
    Keypart Price
    £159.86 (inc VAT)
    £133.22 (ex VAT)
    List Price
    £199.84 (inc VAT)
    £166.53 (ex VAT)
    In Stock

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Repair Items

  • 18-2193 - Mercruiser 4.3L MPI 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 MPI 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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  • Awaiting
    Image
    888777001
    Timing Cover with Seal - Plastic
    Keypart Price
    £298.79 (inc VAT)
    £248.99 (ex VAT)
    Special Order Usually 3 - 5 Days

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  • 18-7508 - Mercruiser 4.3L MPI 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 MPI 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 MPI 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 MPI 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.

** SPECIAL OFFER **

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 MPI 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 MPI 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 MPI 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 MPI 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 MPI 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

  • 18-03208 - Mercruiser 4.3L MPI 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 MPI 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 MPI 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 MPI 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 MPI Petrol Engine Parts