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Mercury 40HP EFI Outboard Parts & Service Kits - 1999 - 2023

(45 products)
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  • PartsVu - Lower Unit Gear Lube Oil Pump - f/ Standard Quart Bottles - Fits 3/8" - 16 drain plug - Includes 8mm adapter - PV1005051

    PartsVu

    PartsVu - Lower Unit Gear Lube Oil Pump - f/ Standard Quart Bottles - Fits 3/8" - 16 drain plug - Includes 8mm adapter - PV1005051

    (9)
    $9.99
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  • Mercury - Drain Screw Gasket - 26-830749

    Mercury

    Mercury - Drain Screw Gasket - 26-830749

    (30)
    $3.68 $5.19
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  • Mercury – In-Line Fuel Filter | FourStroke Fuel System | Composite Filter Body | 879885K

    Mercury

    Mercury – In-Line Fuel Filter | FourStroke Fuel System | Composite Filter Body | 879885K

    (18)
    $15.64 $18.42
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  • Mercury – Phantom Black Enamel Spray Paint | OEM Factory Match | 12 oz Can | 8028781

    Mercury

    Mercury – Phantom Black Enamel Spray Paint | OEM Factory Match | 12 oz Can | 8028781

    (12)
    $17.99 $22.99
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  • Mercury – Water Pump Repair Kit | Multi-Engine Cooling System Kit | Marine-Grade Components | 8M0100526

    Mercury

    Mercury – Water Pump Repair Kit | Multi-Engine Cooling System Kit | Marine-Grade Components | 8M0100526

    (6)
    $57.49 $66.99
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  • Mercury Outboard Oil Filter 30 40 50 60 EFI SEA PRO 3-Cylinder 4-Cylinder - 35-8M0065104

    Mercury

    Mercury Outboard Oil Filter 30 40 50 60 EFI SEA PRO 3-Cylinder 4-Cylinder - 35-8M0065104

    (8)
    $11.25 $15.90
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  • Mercury - Filter kit-fuel - 35-8M0149607

    Mercury

    Mercury - Filter kit-fuel - 35-8M0149607

    (7)
    $19.04 $22.49
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  • Mercury Marine Touch Up Paint - Phantom Black - 8M0137135
    Sold out

    Mercury

    Mercury – Phantom Black Paint Touch-Up Pen | Engine Finish Care | Factory-Match Paint | 8M0137135

    (1)
    $16.96 $22.99
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  • Mercury 40/50/60 HP EFI 4-Stroke Complete 100 Hour Service Maintenance Kit 25W-40 - 8M0232733 (Superseded from 8M0090558)

    Mercury

    Mercury 40/50/60 HP EFI 4-Stroke Complete 100 Hour Service Maintenance Kit 25W-40 - 8M0232733 (Superseded from 8M0090558)

    (10)
    $119.56
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  • Mercury – 300 Hour Maintenance Kit | FourStroke EFI Service | Complete OEM Components | 8M0113483

    Mercury

    Mercury – 300 Hour Maintenance Kit | FourStroke EFI Service | Complete OEM Components | 8M0113483

    (4)
    $283.49 $333.49
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  • Mercury – 300-Hour Maintenance Kit | 40–60HP FourStroke EFI Command Thrust | OEM Service Components | 8M0090559

    Mercury

    Mercury – 300-Hour Maintenance Kit | 40–60HP FourStroke EFI Command Thrust | OEM Service Components | 8M0090559

    (10)
    $212.49 $249.99
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  • CHAMPION SPARK PLUGS - 810 10388 - RA8HC

    CHAMPION SPARK PLUGS

    CHAMPION SPARK PLUGS - 810 10388 - RA8HC

    (6)
    $3.79 $5.29
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  • Mercury 40/50/60 HP EFI 4-Stroke Complete 100 Hour Service Maintenance Kit 10W-30 - 8M0232733 (Superseded from 8M0090558)

    Mercury

    Mercury 40/50/60 HP EFI 4-Stroke Complete 100 Hour Service Maintenance Kit 10W-30 - 8M0232733 (Superseded from 8M0090558)

    (11)
    $119.56
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  • Mercury – Quicksilver Water Pump Impeller | Cooling System Component | Marine-Grade Rubber | 43026T2

    Mercury

    Mercury – Quicksilver Water Pump Impeller | Cooling System Component | Marine-Grade Rubber | 43026T2

    (3)
    $30.99 $36.49
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  • Mercury – Quicksilver 812966A12 Water Pump Repair Kit | Mercury & Mariner 4-Stroke 30–60HP Outboards | Complete OEM Kit | 812966A12

    Mercury

    Mercury – Quicksilver 812966A12 Water Pump Repair Kit | Mercury & Mariner 4-Stroke 30–60HP Outboards | Complete OEM Kit | 812966A12

    (4)
    $155.99 $181.99
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  • Mercury Marine 25 30 40 50 & 60 HP Four Stroke Outboard FC-W 25W-40 Synthetic Blend Oil Change Kit

    Mercury

    Mercury Marine 25 30 40 50 & 60 HP Four Stroke Outboard FC-W 25W-40 Synthetic Blend Oil Change Kit

    (5)
    $71.48
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  • Mercury 40/50/60 HP EFI 4-Stroke Complete 100 Hour Service Maintenance Kit 25W-40 Synthetic Blend - 8M0232733 (Superseded from 8M0090558)

    Mercury

    Mercury 40/50/60 HP EFI 4-Stroke Complete 100 Hour Service Maintenance Kit 25W-40 Synthetic Blend - 8M0232733 (Superseded from 8M0090558)

    (7)
    $131.56
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  • Mercury Marine 25 30 40 50 & 60 HP Four Stroke Outboard FC-W 25W-40 Oil Change Kit

    Mercury

    Mercury Marine 25 30 40 50 & 60 HP Four Stroke Outboard FC-W 25W-40 Oil Change Kit

    (2)
    $57.24
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  • Mercury - Thermostat - 120 Degrees - 14586

    Mercury

    Mercury - Thermostat - 120 Degrees - 14586

    $34.99 $40.99
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  • Mercury - GASKET - 27-824853

    Mercury

    Mercury - GASKET - 27-824853

    $8.99 $12.69
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  • Mercury 40/50/60 HP EFI 4-Stroke Complete 100 Hour Service Maintenance Kit 10W-30 Synthetic Blend - 8M0232733 (Superseded from 8M0090558)

    Mercury

    Mercury 40/50/60 HP EFI 4-Stroke Complete 100 Hour Service Maintenance Kit 10W-30 Synthetic Blend - 8M0232733 (Superseded from 8M0090558)

    (3)
    $131.56
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  • Mercury Marine 25 30 40 50 & 60 HP Four Stroke Outboard FC-W 10W-30 Oil Change Kit

    Mercury

    Mercury Marine 25 30 40 50 & 60 HP Four Stroke Outboard FC-W 10W-30 Oil Change Kit

    $59.48
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  • Mercury Marine 25 30 40 50 & 60 HP Four Stroke Outboard FC-W 10W-30 Synthetic Blend Oil Change Kit

    Mercury

    Mercury Marine 25 30 40 50 & 60 HP Four Stroke Outboard FC-W 10W-30 Synthetic Blend Oil Change Kit

    $71.48
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  • Mercury - Outboard Aluminum Power Trim Anode - Fits Mercury/Mariner 30 - 40 Four Stroke 40 - 50 - 55 - 60‑90 - 75 - 90 Four Stroke - 100 ‑ 125 - 115 - 818298T1

    Mercury

    Mercury – Quicksilver 818298T1 Aluminum Anode Kit | Mercury & Mariner Outboards | V6, OptiMax, and 4.6L V8 Engines | 818298T1

    $23.99 $27.99
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  • Mercury 40/50/60 Complete 300 Hour Service Maintenance Kit 25W-40 - Standard Gearcases Only - For Serial Numbers 1C453840 & Up - 8M0113483

    Mercury

    Mercury 40/50/60 Complete 300 Hour Service Maintenance Kit 25W-40 - Standard Gearcases Only - For Serial Numbers 1C453840 & Up - 8M0113483

    (2)
    $352.06
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  • Mercury 40/50/60 Complete 300 Hour Service Maintenance Kit 10W-30 Synthetic Blend - Standard Gearcases Only - For Serial Numbers 1C453840 & Up - 8M0113483

    Mercury

    Mercury 40/50/60 Complete 300 Hour Service Maintenance Kit 10W-30 Synthetic Blend - Standard Gearcases Only - For Serial Numbers 1C453840 & Up - 8M0113483

    (1)
    $364.06
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  • Mercury 826134T Outboard Aluminum Side Pocket Anode - Fits Mercury/Mariner 30‑300 HP Outboards - Force 90 & 120 HP 1995 and newer Outboards

    Mercury

    Mercury – Quicksilver 826134T Side Pocket Aluminum Anode | Mercury, Mariner & Force Outboards | 826134T

    $15.49 $18.20
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  • Mercury 8M0117413 Outboard Thermostat - Fits 40-60 HP SeaPro EFI Four Stroke

    Mercury

    Mercury 8M0117413 Outboard Thermostat - Fits 40-60 HP SeaPro EFI Four Stroke

    (2)
    $13.73 $19.40
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  • Mercury 40/50/60 Complete 300 Hour Service Maintenance Kit 25W-40 Synthetic Blend - Standard Gearcases Only - For Serial Numbers 1C453840 & Up - 8M0113483

    Mercury

    Mercury 40/50/60 Complete 300 Hour Service Maintenance Kit 25W-40 Synthetic Blend - Standard Gearcases Only - For Serial Numbers 1C453840 & Up - 8M0113483

    (1)
    $364.06
    Learn More
  • Mercury 40/50/60 Complete 300 Hour Service Maintenance Kit 10W-30 - Standard Gearcases Only - For Serial Numbers 1C453840 & Up - 8M0113483

    Mercury

    Mercury 40/50/60 Complete 300 Hour Service Maintenance Kit 10W-30 - Standard Gearcases Only - For Serial Numbers 1C453840 & Up - 8M0113483

    (4)
    $352.06
    Learn More
  • Mercury – Quicksilver Water Pump Impeller | Cooling System Component | Marine-Grade Rubber | 19453T

    Mercury

    Mercury – Quicksilver Water Pump Impeller | Cooling System Component | Marine-Grade Rubber | 19453T

    (1)
    $47.99 $55.99
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  • Mercury 31640T07 Outboard Trim Tab - Fits Most Mercury/Mariner Outboards 35 HP and above - All MerCruiser except Bravo

    Mercury

    Mercury 31640T07 Outboard Trim Tab - Fits Most Mercury/Mariner Outboards 35 HP and above - All MerCruiser except Bravo

    $22.86 $26.99
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  • STAINLESS STEEL NUT (M6) - 11-401386

    Mercury

    STAINLESS STEEL NUT (M6) - 11-401386

    $3.61 $5.10
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  • Mercury 17264T2 Outboard Anode Trim Tab - See Below for Specific Applications

    Mercury

    Mercury 17264T2 Outboard Anode Trim Tab - See Below for Specific Applications

    $27.99 $32.83
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  • Mercury - Screw (M6 x 40) - 10-4000333

    Mercury

    Mercury - Screw (M6 x 40) - 10-4000333

    $2.90 $4.10
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  • Mercury - Stainless Steel Washer - 9/32 in x 1/2 in x 1/16 in - 12-29245

    Mercury

    Mercury - Stainless Steel Washer - 9/32 in x 1/2 in x 1/16 in - 12-29245

    $0.85 $1.20
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A 1999 40 hp Mercury outboard may be a 2-stroke or early 4-stroke model depending on the exact serial number. Maintenance and parts should be matched by serial number, since fuel system, ignition, oil, and lower unit specifications can differ.

Our selection of Mercury outboard parts and service kits includes everything outboard owners need to maintain their Mercury 40HP EFI outboard engines (1999 to 2023 models).

Shop our complete selection of parts and service kits for Mercury 40HP EFI outboard engines. Our selection of certified outboard parts includes gaskets, thermostats, marine engine oil, spark plugs, oil filters, fuel filters, and more. Our service kits also combine everything you need for periodic outboard service into one convenient package. These kits are intended for Mercury 40HP EFI outboard engine models produced from 1999 to 2023.