Shopping Basket
0 Items

4.5L MPI 250 EC Petrol Engine Parts

A serial number between the range of 2A441953 - 2A999999

Service Items

Lubricants

Engine oil capacity is approximately 4.25 Litres

  • 18-9410-4 - Mercruiser 4.5L MPI 250 EC 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)
    List Price
    £103.40 Ex VAT
    £124.08 Inc VAT
    Keypart Price
    £36.00 Ex VAT
    £43.20 Inc VAT
    In Stock

    Add to Basket (0)
  • 92-858074QB1 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Power Trim & Tilt Fluid - 8oz/237ml
    92-858074QB1
    Power Trim & Tilt Fluid - 8oz/237ml
    List Price
    £8.82 Ex VAT
    £10.58 Inc VAT
    Keypart Price
    £7.94 Ex VAT
    £9.53 Inc VAT
    In Stock

    Add to Basket (0)
  • 33799-0000 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Oil Change Pump Kit (Universal)
    33799-0000
    Oil Change Pump Kit (Universal)
    List Price
    £75.00 Ex VAT
    £90.00 Inc VAT
    Keypart Price
    £65.00 Ex VAT
    £78.00 Inc VAT
    In Stock

    Add to Basket (0)

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

  • 18-3016-1 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Sea-water Pump Impeller
    18-3016-1
    Sea-water Pump Impeller
    List Price
    £69.43 Ex VAT
    £83.32 Inc VAT
    Keypart Price
    £52.07 Ex VAT
    £62.48 Inc VAT
    In Stock

    Add to Basket (0)
  • Awaiting
    Image
    57-8M0097728
    Serpentine Belt - - for Bravo Spec - Direct Cooling
    List Price
    £84.92 Ex VAT
    £101.90 Inc VAT
    Keypart Price
    £76.43 Ex VAT
    £91.72 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • 18-2412-1 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Engine Coupler - Replacement (Engine Alignment will need to be checked when replacing this item)
    18-2412-1
    Engine Coupler - Replacement (Engine Alignment will need to be checked when replacing this item)
    List Price
    £538.08 Ex VAT
    £645.70 Inc VAT
    Keypart Price
    £484.27 Ex VAT
    £581.12 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)

Cooling System

  • 18-3649 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Thermostat 160 deg - (for Direct Cooling)
    18-3649
    Thermostat 160 deg - (for Direct Cooling)
    List Price
    £53.63 Ex VAT
    £64.36 Inc VAT
    Keypart Price
    £37.54 Ex VAT
    £45.05 Inc VAT
    In Stock

    Add to Basket (0)
  • Awaiting
    Image
    864493
    Thermostat 170 Deg- Genuine - (for Fresh-water Cooling)
    List Price
    £22.98 Ex VAT
    £27.58 Inc VAT
    Keypart Price
    £20.68 Ex VAT
    £24.82 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • 18-4226 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Drain Tap - Blue Plastic
    18-4226
    Drain Tap - Blue Plastic
    List Price
    £8.63 Ex VAT
    £10.36 Inc VAT
    Keypart Price
    £6.90 Ex VAT
    £8.28 Inc VAT
    In Stock

    Add to Basket (0)
  • 18-2909 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Exhaust Manifold to Head Gasket (2 required per engine)
    18-2909
    Exhaust Manifold to Head Gasket (2 required per engine)
    List Price
    £8.70 Ex VAT
    £10.44 Inc VAT
    Keypart Price
    £7.83 Ex VAT
    £9.40 Inc VAT
    In Stock

    Add to Basket (0)
  • Awaiting
    Image
    27-8M2004414
    Exhaust Manifold to Riser Gasket - Direct Cooling - (2 required per Engine)
    List Price
    £56.15 Ex VAT
    £67.38 Inc VAT
    Keypart Price
    £50.53 Ex VAT
    £60.64 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • Awaiting
    Image
    27-8M2004606
    Exhaust Manifold to Riser Gasket - Freshwater Cooled Engines - (2 required per Engine)
    List Price
    £175.68 Ex VAT
    £210.82 Inc VAT
    Keypart Price
    £158.11 Ex VAT
    £189.73 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • Awaiting
    Image
    57-8M0087881
    Serpentine Belt for Alpha spec - - Direct Cooling
    List Price
    £101.06 Ex VAT
    £121.27 Inc VAT
    Keypart Price
    £90.95 Ex VAT
    £109.14 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • Awaiting
    Image
    865597T
    Belt Tensioner - Genuine
    List Price
    £86.05 Ex VAT
    £103.26 Inc VAT
    Keypart Price
    £77.45 Ex VAT
    £92.94 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • Awaiting
    Image
    865777
    Idler Pulley - Non Grooved - Genuine
    List Price
    £52.93 Ex VAT
    £63.52 Inc VAT
    Keypart Price
    £47.64 Ex VAT
    £57.17 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • 807166A1 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Exhaust Shutter - (2 required per engine)
    807166A1
    Exhaust Shutter - (2 required per engine)
    List Price
    £97.47 Ex VAT
    £116.96 Inc VAT
    Keypart Price
    £48.74 Ex VAT
    £58.49 Inc VAT
    In Stock

    Add to Basket (0)
  • 18-2748 - Mercruiser 4.5L MPI 250 EC 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)
    List Price
    £105.35 Ex VAT
    £126.42 Inc VAT
    Keypart Price
    £79.01 Ex VAT
    £94.81 Inc VAT
    In Stock

    Add to Basket (0)
  • 18-2746 - Mercruiser 4.5L MPI 250 EC 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)
    List Price
    £83.00 Ex VAT
    £99.60 Inc VAT
    Keypart Price
    £62.25 Ex VAT
    £74.70 Inc VAT
    In Stock

    Add to Basket (0)

Fuel System (Engine)

  • 18-7981 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Fuel Filter - Replacement - - for Fuel Supply Module
    18-7981
    Fuel Filter - Replacement - - for Fuel Supply Module
    List Price
    £66.42 Ex VAT
    £79.70 Inc VAT
    Keypart Price
    £53.14 Ex VAT
    £63.77 Inc VAT
    In Stock

    Add to Basket (0)
  • 92-8M0079745 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Quickstor Fuel Stabiliser - 355ml (12oz) - Genuine
    92-8M0079745
    Quickstor Fuel Stabiliser - 355ml (12oz) - Genuine
    Keypart Price
    £19.58 Ex VAT
    £23.50 Inc VAT
    In Stock

    Add to Basket (0)

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 4.5L MPI 250 EC 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
    List Price
    £40.00 Ex VAT
    £48.00 Inc VAT
    Keypart Price
    £30.00 Ex VAT
    £36.00 Inc VAT
    Low Stock

    Add to Basket (0)
  • 18-8074 - Mercruiser 4.5L MPI 250 EC 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
    List Price
    £8.00 Ex VAT
    £9.60 Inc VAT
    Keypart Price
    £6.00 Ex VAT
    £7.20 Inc VAT
    In Stock

    Add to Basket (0)
  • 18-8067 - Mercruiser 4.5L MPI 250 EC 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
    List Price
    £10.00 Ex VAT
    £12.00 Inc VAT
    Keypart Price
    £8.00 Ex VAT
    £9.60 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • 18-7944 - Mercruiser 4.5L MPI 250 EC 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
    List Price
    £11.92 Ex VAT
    £14.30 Inc VAT
    Keypart Price
    £9.54 Ex VAT
    £11.45 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • 18-7945 - Mercruiser 4.5L MPI 250 EC 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
    List Price
    £11.92 Ex VAT
    £14.30 Inc VAT
    Keypart Price
    £9.54 Ex VAT
    £11.45 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • 35-802893Q01 - Mercruiser 4.5L MPI 250 EC 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
    List Price
    £11.92 Ex VAT
    £14.30 Inc VAT
    Keypart Price
    £10.73 Ex VAT
    £12.88 Inc VAT
    Low Stock

    Add to Basket (0)

Ignition System

  • BPR5EFS - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Spark Plug - (6 required per Engine)
    BPR5EFS
    Spark Plug - (6 required per Engine)
    List Price
    £6.20 Ex VAT
    £7.44 Inc VAT
    Keypart Price
    £3.20 Ex VAT
    £3.84 Inc VAT
    In Stock

    Add to Basket (0)
  • Awaiting
    Image
    300-8M0044991
    Ignition Coil (Dual Output) - Genuine - (3 required per Engine)
    List Price
    £91.86 Ex VAT
    £110.23 Inc VAT
    Keypart Price
    £82.67 Ex VAT
    £99.20 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)

Electrical System

  • 3854164-R - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts 50amp Reset Fuse Unit
    3854164-R
    50amp Reset Fuse Unit
    List Price
    £128.00 Ex VAT
    £153.60 Inc VAT
    Keypart Price
    £89.60 Ex VAT
    £107.52 Inc VAT
    In Stock

    Add to Basket (0)
  • Awaiting
    Image
    8M6000623-R
    Water Pressure Sensor - Replacement
    List Price
    £166.53 Ex VAT
    £199.84 Inc VAT
    Keypart Price
    £133.22 Ex VAT
    £159.86 Inc VAT
    In Stock

    Add to Basket (0)
  • 8M0092849 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Stop Switch Lanyard - Genuine
    8M0092849
    Stop Switch Lanyard - Genuine
    Keypart Price
    £16.18 Ex VAT
    £19.42 Inc VAT
    In Stock

    Add to Basket (0)
  • Awaiting
    Image
    50-8M0095471
    Starter Motor Assembly
    List Price
    £242.74 Ex VAT
    £291.29 Inc VAT
    Keypart Price
    £218.47 Ex VAT
    £262.16 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)

Repair Items

  • 18-2323 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Engine Coupler (Without Yoke) - Replacement - - for Alpha spec Engines
    18-2323
    Engine Coupler (Without Yoke) - Replacement - - for Alpha spec Engines
    List Price
    £346.89 Ex VAT
    £416.27 Inc VAT
    Keypart Price
    £277.51 Ex VAT
    £333.01 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)

Chemicals

  • 20.052 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Black Touch-up Paint 10ml (Shipping restrictions may apply)
    20.052
    Black Touch-up Paint 10ml (Shipping restrictions may apply)
    List Price
    £7.30 Ex VAT
    £8.76 Inc VAT
    Keypart Price
    £3.50 Ex VAT
    £4.20 Inc VAT
    In Stock

    Add to Basket (0)
  • LOCTITE-243-10ML - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Loctite Threadlock 10ml
    LOCTITE-243-10ML
    Loctite Threadlock 10ml
    List Price
    £26.00 Ex VAT
    £31.20 Inc VAT
    Keypart Price
    £21.00 Ex VAT
    £25.20 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • LOCTITE-243-50ML - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Loctite Threadlock 50ml
    LOCTITE-243-50ML
    Loctite Threadlock 50ml
    List Price
    £60.00 Ex VAT
    £72.00 Inc VAT
    Keypart Price
    £50.00 Ex VAT
    £60.00 Inc VAT
    In Stock

    Add to Basket (0)
  • 92-8M0079745 - Mercruiser 4.5L MPI 250 EC 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
    £19.58 Ex VAT
    £23.50 Inc VAT
    In Stock

    Add to Basket (0)
  • 92-8M0121972 - Mercruiser 4.5L MPI 250 EC 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)
    List Price
    £21.29 Ex VAT
    £25.55 Inc VAT
    Keypart Price
    £19.16 Ex VAT
    £22.99 Inc VAT
    In Stock

    Add to Basket (0)

Tools & Manuals

  • 33799-0000 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Oil Change Pump Kit (Universal)
    33799-0000
    Oil Change Pump Kit (Universal)
    List Price
    £75.00 Ex VAT
    £90.00 Inc VAT
    Keypart Price
    £65.00 Ex VAT
    £78.00 Inc VAT
    In Stock

    Add to Basket (0)

Accessories

  • MP40970-1 - Mercruiser 4.5L MPI 250 EC Petrol Engine Parts Safety Switch - Sierra Marine Works - Coiled Lanyard
    MP40970-1
    Safety Switch - Sierra Marine Works - Coiled Lanyard
    List Price
    £34.00 Ex VAT
    £40.80 Inc VAT
    Keypart Price
    £26.00 Ex VAT
    £31.20 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)
  • UN77310 - Mercruiser 4.5L MPI 250 EC 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)
    List Price
    £24.00 Ex VAT
    £28.80 Inc VAT
    Keypart Price
    £17.00 Ex VAT
    £20.40 Inc VAT
    Please Contact for Stock Status

    Add to Basket (0)

4.5L MPI 250 EC Petrol Engine Parts