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Engine Parts & Service - Accessories

Marine engine accessories are designed to enhance the performance, reliability, and longevity of your vessel's engine while supporting routine maintenance, repairs, and upgrades. Engineered for demanding freshwater and saltwater environments, these marine-grade accessories are built to withstand vibration, moisture, heat, and corrosion for dependable operation season after season. From engine mounting hardware, service tools, hoses, fittings, fuel system accessories, cooling system components, replacement hardware, and maintenance supplies to specialized installation and repair accessories, these products help keep your engine operating at peak efficiency. Whether you're performing scheduled maintenance, replacing worn components, or completing a new engine installation, the right accessories simplify service and help protect your investment. Engine maintenance with quality accessories contributes to improved reliability, smoother operation, and extended engine life.

Featuring premium products from trusted marine manufacturers, our Engine Parts & Service – Accessories collection delivers the quality, durability, and performance serious boaters expect. Browse our selection today and let our knowledgeable team help you find the ideal accessories to keep your marine engine running at its best.

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  • ARCO Zeus Alternator Shield - 12V [AS12]
    ARCO Marine

    ARCO Zeus Alternator Shield - 12V [AS12]

    £65.27
    £76.76
    £65.27
    Zeus Alternator Shield - 12VProtect Your Alternator from Voltage Spikes & Disconnect EventsThe ARCO Zeus Alternator Shield is engineered to protect high-output alternators from damaging voltage spikes caused by sudden battery disconnect events. These events, commonly triggered by lithium battery BMS shutdowns or accidental...
    £65.27
    £76.76
    £65.27
  • ARCO Marine Premium Replacement Ignition Coil f/Mercury Outboard Engines 2005-Present [IG010]
    ARCO Marine

    ARCO Marine Premium Replacement Ignition Coil f/Mercury Outboard Engines 2005-Present [IG010]

    £64.50
    £109.90
    £64.50
    Premium Replacement Ignition Coil for Mercury Outboard Engines 2005-PresentThis ignition coil fits 2005- UP (110 Jet, 135, 150, 175, 200, 225 & 250HP) DFI Outboard 1100,1350 and 1650QC4V Race Sterndrives.Replaces: MERCURY Ignition Coil 300-8M0077471 MERCURY Ignition Coil 339-879984A1 MERCURY Ignition Coil 339-879984T00 SIERRA Ignition...
    £64.50
    £109.90
    £64.50
  • ARCO Marine Mercury/Mariner Outboard Relay w/Shroud Grommet [R151]ARCO Marine Mercury/Mariner Outboard Relay w/Shroud Grommet [R151]
    ARCO Marine

    ARCO Marine Mercury/Mariner Outboard Relay w/Shroud Grommet [R151]

    £11.51
    £15.67
    £11.51
    Mercury/Mariner Outboard Relay with Shroud & GrommetMercury/Mariner outboard relay that will fit Mercury & Mariner Outboards. 12 Volt, 30 AmpReplaces:Mercury Marine 828151Mercury Marine 828151A1Mercury Marine 882751A1*ARCO Assurance 12-month part and labor warranty protectionThis product may not be returned to the original point of purchase....
    £11.51
    £15.67
    £11.51
  • ARCO Marine 500A/50mV Shunt [ST500]
    ARCO Marine

    ARCO Marine 500A/50mV Shunt [ST500]

    £24.15
    £28.83
    £24.15
    500A/50mV ShuntShunt 500 Amp 50 mV - 500A/50mV
    £24.15
    £28.83
    £24.15
  • Trident Marine 316 SS T-Bolt Clamp - 3/4" Band - 4.37"-4.94" Range [720-4000L]
    Trident Marine

    Trident Marine 316 SS T-Bolt Clamp - 3/4" Band - 4.37"-4.94" Range [720-4000L]

    £10.74
    £16.10
    £10.74
    316 SS T-Bolt Clamp - 3/4" Band - 4.37"-4.94" RangeVery strong and secure clamp for critical installations. Trident Marine T-Bolt Clamps are built with safety in mind. With a 3/4" (19 mm) wide band, this clamp ensures a greater area of coverage for a...
    £10.74
    £16.10
    £10.74
  • Attwood Fuel/Water Separator [11841-4]
    Attwood Marine

    Attwood Fuel/Water Separator [11841-4]

    £6.90
    £11.97
    £6.90
    Fuel/Water SeparatorKeep your engine running at peak efficiency by filtering out any water that may get into the fuel system. 10-micron filtering capability.Features: Double seal for enhanced performance Replacement for: Mercury 35-60494-1, Aqua Power 6031, GLM 24940, Sierra 18-78250, SMI 15494, Valmar 52113, Marpac...
    £6.90
    £11.97
    £6.90
  • Trident Marine 316 SS T-Bolt Clamp - 3/4" Band - 5.28"-5.59" Range [720-5000]
    Trident Marine

    Trident Marine 316 SS T-Bolt Clamp - 3/4" Band - 5.28"-5.59" Range [720-5000]

    £11.51
    £16.80
    £11.51
    316 SS T-Bolt Clamp - 3/4" Band - 5.28"-5.59" RangeVery strong and secure clamp for critical installations. Trident Marine T-Bolt Clamps are built with safety in mind. With a 3/4" (19 mm) wide band, this clamp ensures a greater area of coverage for a...
    £11.51
    £16.80
    £11.51
  • ARCO Marine Premium Replacement Ignition Coil f/Mercury Outboard Engines 1998-2006 [IG012]
    ARCO Marine

    ARCO Marine Premium Replacement Ignition Coil f/Mercury Outboard Engines 1998-2006 [IG012]

    £59.89
    £103.68
    £59.89
    Premium Replacement Ignition Coil for Mercury Outboard Engines 1998-2006This ignition coil fits 1998-2006 (135,200,225,250 & 300HP) Mercury outboard engines.Replaces: MERCURY Ignition Coil 339-850227 MERCURY Ignition Coil 339-856991A1 SIERRA Ignition Coil 18-5187 CDI Electronics Ignition Coil 184-0005 *ARCO Assurance 12-month part and labor warranty protectionThis...
    £59.89
    £103.68
    £59.89
  • Regitar USA Voltage Regulator f/Mercury Marine Outboard 4 Stroke 30, 40, 50, and 60 Hp Engines [RMV005]Regitar USA Voltage Regulator f/Mercury Marine Outboard 4 Stroke 30, 40, 50, and 60 Hp Engines [RMV005]
    Regitar U.S.A.

    Regitar USA Voltage Regulator f/Mercury Marine Outboard 4 Stroke 30, 40, 50, and 60 Hp Engines [RMV005]

    £60.66
    £96.00
    £60.66
    Voltage Regulator for Mercury Marine Outboard 4 Stroke 30, 40, 50, and 60 Hp EnginesVoltage Regulator for Mercury Marine Outboard 4 Stroke 30, 40, 50, and 60 Hp Engines.Engine Brand:MercuryFitment:Mercury Outboards 2/3/4/6 Cyl.  (1999 – 2007) Specifications: Type: Parts Box Dimensions: 3"H x 4"W...
    £60.66
    £96.00
    £60.66
  • ARCO Marine IG023 Ignition Coil Assembly f/Yamaha Outboard Engines [IG023]
    ARCO Marine

    ARCO Marine IG023 Ignition Coil Assembly f/Yamaha Outboard Engines [IG023]

    £39.93
    £69.10
    £39.93
    IG023 Ignition Coil Assembly for Yamaha Outboard EnginesThis ARCO ignition coil assembly is designed for specific Yamaha outboard engines.Fits:Yamaha 9.9HP 15HP 2-Stroke 1996-2009 Outboard EnginesReplaces: YAMAHA Ignition Coil Assy 63V-85570-00-00 YAMAHA Ignition Coil Assy 63V-85570-01-00 YAMAHA Ignition Coil Assy 63V-85570-02-00 YAMAHA Ignition Coil Assy...
    £39.93
    £69.10
    £39.93
  • ARCO Marine Mercruiser Tilt Trim Reservoir Kit - 4 Screw Mount [M532]ARCO Marine Mercruiser Tilt Trim Reservoir Kit - 4 Screw Mount [M532]
    ARCO Marine

    ARCO Marine Mercruiser Tilt Trim Reservoir Kit - 4 Screw Mount [M532]

    £36.85
    £47.80
    £36.85
    Mercruiser Tilt Trim Reservoir Kit - 4 Screw MountTilt trim reservoir kit that will fit Arco 6275 Tilt Motor 4 screw mount. Replaces Mercruiser.Replaces:Mercruiser 883166A2*ARCO Assurance 12-month part and labor warranty protectionThis product may not be returned to the original point of purchase. Please...
    £36.85
    £47.80
    £36.85
  • Regitar USA Rotor f/Mercruiser: 2001 Newer MCM/MIE 4.3L, 5.0L, 5.7L 6.2L MPI Engines w/ECM 555 [RMN010]Regitar USA Rotor f/Mercruiser: 2001 Newer MCM/MIE 4.3L, 5.0L, 5.7L 6.2L MPI Engines w/ECM 555 [RMN010]
    Regitar U.S.A.

    Regitar USA Rotor f/Mercruiser: 2001 Newer MCM/MIE 4.3L, 5.0L, 5.7L 6.2L MPI Engines w/ECM 555 [RMN010]

    £9.98
    £13.06
    £9.98
    Rotor for Mercruiser: 2001 & Newer MCM/MIE 4.3L, 5.0L, 5.7L & 6.2L MPI Engines with ECM 555Rotor for Mercruiser: 2001 & Newer MCM/MIE 4.3L, 5.0L, 5.7L & 6.2L MPI Engines with ECM 555.Engine Brand:Mercury / MercruiserFitment:2001 & Newer MCM/MIE 4.3L, 5.0L, 5.7L & 6.2L...
    £9.98
    £13.06
    £9.98
  • Regitar USA Rotor f/Mercruiser Volvo Penta Inboard Engines [RMN006]Regitar USA Rotor f/Mercruiser Volvo Penta Inboard Engines [RMN006]
    Regitar U.S.A.

    Regitar USA Rotor f/Mercruiser Volvo Penta Inboard Engines [RMN006]

    £7.67
    £9.98
    £7.67
    Rotor for Mercruiser & Volvo Penta Inboard EnginesRotor for Mercruiser and Volvo Penta Inboard Engines: Blue - new GM style "Module in Cap" distributors - V-8 application.Engine Brand: Mercury / Mercruiser Volvo Penta Fitment:New GM style "Module in Cap" distributors - V-8 application Brochure...
    £7.67
    £9.98
    £7.67
  • Regitar USA Rotor f/Mercruiser Engines: GM V-6 Engines w/Thunderbolt IV V HEI Ignition [RMN015]Regitar USA Rotor f/Mercruiser Engines: GM V-6 Engines w/Thunderbolt IV V HEI Ignition [RMN015]
    Regitar U.S.A.

    Regitar USA Rotor f/Mercruiser Engines: GM V-6 Engines w/Thunderbolt IV V HEI Ignition [RMN015]

    £9.98
    £11.52
    £9.98
    Rotor for Mercruiser Engines: GM V-6 Engines with Thunderbolt IV & V HEI IgnitionRotor for Mercruiser Engines: GM V-6 Engines with Thunderbolt IV & V HEI Ignition.Engine Brand: Mercury / Mercruiser OMC Fitment:GM V-6 Engines with Thunderbolt IV & V HEI Ignition Brochure (pdf)
    £9.98
    £11.52
    £9.98
  • Regitar USA Ignition Module f/Mercruiser Engines: 4 Cyl., V-6 V-8 Engines w/Delco HEI Ignition [RMG004]Regitar USA Ignition Module f/Mercruiser Engines: 4 Cyl., V-6 V-8 Engines w/Delco HEI Ignition [RMG004]
    Regitar U.S.A.

    Regitar USA Ignition Module f/Mercruiser Engines: 4 Cyl., V-6 V-8 Engines w/Delco HEI Ignition [RMG004]

    £59.89
    £81.40
    £59.89
    Ignition Module for Mercruiser Engines: 4 Cyl., V-6 & V-8 Engines with Delco HEI IgnitionIgnition Module for Mercruiser Engines: 4 Cylinder, V-6 & V-8 Engines with Delco HEI Ignition.Engine Brand:Mercury / MercruiserFitment:GM 4 Cyl., V-6 & V-8 Engines with Delco HEI Ignition Brochure (pdf)
    £59.89
    £81.40
    £59.89
  • Regitar USA Distributor Cap f/GM V-8 Engines w/Thunderbolt IV V HEI Ignitions [RMN014]Regitar USA Distributor Cap f/GM V-8 Engines w/Thunderbolt IV V HEI Ignitions [RMN014]
    Regitar U.S.A.

    Regitar USA Distributor Cap f/GM V-8 Engines w/Thunderbolt IV V HEI Ignitions [RMN014]

    £9.21
    £11.52
    £9.21
    Distributor Cap for GM V-8 Engines with Thunderbolt IV & V HEI IgnitionsDistributor Cap for GM V-8 Engines with Thunderbolt IV and V HEI Ignitions.Engine Brand: Mercury / Mercruiser OMC Fitment:GM V-8 Engines with Thunderbolt IV & V HEI Ignitions Brochure (pdf)
    £9.21
    £11.52
    £9.21
  • ARCO Marine IG026 Ignition Coil f/Yamaha Outboard Engines [IG026]
    ARCO Marine

    ARCO Marine IG026 Ignition Coil f/Yamaha Outboard Engines [IG026]

    £32.25
    £53.93
    £32.25
    IG026 Ignition Coil for Yamaha Outboard EnginesThis ARCO ignition coil is designed for specific Yamaha outboard engines.Fits:Outboard engine 115-225HP; L200, L150, L130, 115, 130, 150, 175, 200, 225Replaces: YAMAHA Ignition Coil 6E5-85570-11-00 YAMAHA Ignition Coil 6E5-85570-10-00 SIERRA Ignition Coil 18-5110 CDI ELECTRONICS Ignition Coil...
    £32.25
    £53.93
    £32.25
  • Regitar USA Condenser f/GM 4 6-Cylinder Engine w/Delco Ignition [RMB001]Regitar USA Condenser f/GM 4 6-Cylinder Engine w/Delco Ignition [RMB001]
    Regitar U.S.A.

    Regitar USA Condenser f/GM 4 6-Cylinder Engine w/Delco Ignition [RMB001]

    £3.83
    £5.38
    £3.83
    Condenser for GM 4 & 6-Cylinder Engine with Delco IgnitionCondenser for 4 and 6-cylinder Mercruiser, Volvo Penta, and OMC inboard engines with Delco Conventional Ignitions.Engine Brand: Mercury / Mercruiser OMC Volvo Penta Fitment: GM 4 and 6-cylinder Engines With Delco Conventional Ignition Specifications: Type: Parts...
    £3.83
    £5.38
    £3.83
  • Flushmaster Portable Storage Bag [SM-FMBAG1]Flushmaster Portable Storage Bag [SM-FMBAG1]
    Flushmaster

    Flushmaster Portable Storage Bag [SM-FMBAG1]

    £15.35
    £0.00
    £15.35
    Portable Storage BagKeep your Flushmaster and hose kit safe and ready for action with the Portable Storage Bag. Whether on the go or trailering your boat, this reliable bag ensures your equipment stays secure and accessible. Order yours today for easy, worry-free adventures!Portable Storage...
    £15.35
    £0.00
    £15.35
  • Regitar USA Rotor f/Mercruiser Inboard Engines: GM Style "Module in Cap" Distributors 4.3L V-6 Engines w/Delco HEI Ignition [RMN004]Regitar USA Rotor f/Mercruiser Inboard Engines: GM Style "Module in Cap" Distributors 4.3L V-6 Engines w/Delco HEI Ignition [RMN004]
    Regitar U.S.A.

    Regitar USA Rotor f/Mercruiser Inboard Engines: GM Style "Module in Cap" Distributors 4.3L V-6 Engines w/Delco HEI Ignition [RMN004]

    £5.37
    £6.90
    £5.37
    Rotor for Mercruiser Inboard Engines: GM Style "Module in Cap" Distributors 4.3L V-6 Engines with Delco HEI IgnitionRotor for Mercruiser Inboard Engines: GM Style "Module in Cap" Distributors 4.3L V-6 Engines with Delco HEI Ignition.Engine Brand: Mercury / Mercruiser OMC Fitment:New GM Style "Module...
    £5.37
    £6.90
    £5.37