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Orders $99 or more ship free within the contiguous U.S.
May not apply to engines or oversized orders.

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Earn up to 1.5 points for every $1 spent. That’s up to 4.5% back that you can redeem and save on future orders. Excludes engine sales.

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Our top priority is your ultimate satisfaction, and to get you back to boating as soon as possible.

Contact a Parts Pro

Mercury 9.9HP 323cc Outboard Parts & Service Kits - 1999 to 2004

(20 products)
  • Mercury FC W 10W 30 Marine Engine Oil - Quart - 92-8M0078625

    Mercury

    Mercury FC W 10W 30 Marine Engine Oil - Quart - 92-8M0078625

    (4)
    $11.99 $14.99
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  • Mercury Synthetic Blend 4 Stroke 10W 30 Marine Engine Oil - Quart - 92-8M0142141

    Mercury

    Mercury – 10W-30 4-Stroke Synthetic Blend Marine Engine Oil | Engine Care | Synthetic Blend | 8M0142141

    (3)
    $16.99 $19.99
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  • Mercury Synthetic Blend 4 Stroke 25W 40 Marine Oil - Quart - 92-8M0078629

    Mercury

    Mercury Synthetic Blend 4 Stroke 25W 40 Marine Oil - Quart - 92-8M0078629

    (3)
    $16.99 $19.99
    Learn More
  • Mercury Phantom Black Enamel Spray Paint - 12oz - 92-8028781

    Mercury

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

    (10)
    $16.99 $19.99
    Learn More
  • Mercury FC W 25W 40 Marine Engine Oil - Quart - 92-8M0078627

    Mercury

    Mercury FC W 25W 40 Marine Engine Oil - Quart - 92-8M0078627

    (1)
    $14.99 $18.99
    Learn More
  • Mercury Outboard Oil Filter 10 15 20 Carbureted 4-Stroke 25 30 EFI 4-Stroke 25 Jet EFI - 35-822626K03

    Mercury

    Mercury Outboard Oil Filter 10 15 20 Carbureted 4-Stroke 25 30 EFI 4-Stroke 25 Jet EFI - 35-822626K03

    (2)
    $13.52 $19.10
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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)
    $16.07 $21.99
    Learn More
  • STANDARD SPARK PLUGS (NGK SPARK PLUGS) - DPR6EA9

    NGK SPARK PLUGS

    STANDARD SPARK PLUGS (NGK SPARK PLUGS) - DPR6EA9

    $3.57 $6.69
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  • Mercury - GASKET - 27-824853

    Mercury

    Mercury - GASKET - 27-824853

    $8.99 $12.69
    Learn More
  • Mercury - Outboard Fuel Filter - Fits 9.9 -15 HP Four Stroke - 35-80365M

    Mercury

    Mercury - Outboard Fuel Filter - Fits 9.9 -15 HP Four Stroke - 35-80365M

    $18.62 $21.99
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  • Mercury 98432T6 Outboard Zinc Anode Trim Tab - Fits Mercury/Mariner 9.9 - 15 HP (323cc) FourStroke Bigfoot - Force 25 HP - Various Mercury/Mariner 2-cycle Outboards

    Mercury

    Mercury – Zinc Trim Tab Anode Plate | Corrosion Protection | Marine Zinc | 98432T6

    (2)
    $23.71 $27.92
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  • Mercury - Water Pump Impeller - Fits Various 15-25 HP - 47-8508910

    Mercury

    Mercury - Water Pump Impeller - Fits Various 15-25 HP - 47-8508910

    $33.20 $38.99
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  • Mercury 825212A1 Outboard Thermostat Kit - Fits Mercury/Mariner 30 - 40 - 45 - 50 HP Four Stroke Outboards.

    Mercury

    Mercury – Quicksilver 825212A1 120°F Thermostat Kit | Mercury & Mariner 30–50HP 4-Stroke Outboards | 825212A1

    $73.49 $85.49
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  • Mercury 35-816296A3 Outboard Fuel Filter 1/4" hose - Fits 8/9.9/15 HP Four Stroke

    Mercury

    Mercury – 816296A3 Fuel Filter Kit | 5–15HP Carbureted FourStroke Outboards | Inline Filter & Hoses | 816296A3

    $13.59 $19.20
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  • Mercury Mariner - Complete Water Pump Kit - Fits 6-15 HP - 46-42089A5

    Mercury

    Mercury – Quicksilver Water Pump Repair Kit | Cooling System Component | Complete OEM Kit | 42089A5

    $126.49 $147.99
    Learn More
  • Mercury - Outboard Water Pump Upper Repair Kit - 46-99157T2

    Mercury

    Mercury – Upper Water Pump Repair Kit | Cooling System | Marine Composite & Rubber | 99157T2

    $103.99 $121.49
    Learn More
  • Mercury - Screw @5 - 10-4000354

    Mercury

    Mercury - Screw (Sold Individually) - 10-4000354

    $3.40 $4.80
    Learn More
  • Mercury Quicksilver - 42121Q02 Outboard Aluminum Anode Kit - Fits 6 - 8 - 9.9 - 13.5 - 15 HP - XR10 - 10 Marathon - 10 Seapro - 10 Viking

    Mercury

    Mercury – Quicksilver Aluminum Square Anode Set | Corrosion Protection Kit | Cast Aluminum | 42121Q02

    $10.62 $14.99
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  • Mercury Washer (.323 x .562 X .063) - 12-8M0042642

    Mercury

    Mercury Washer (.323 x .562 X .063) - 12-8M0042642

    $1.27 $1.80
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  • Mercury - Impeller (Sold Individually) - 47-42038K02

    Mercury

    Mercury – Water Pump Impeller | Cooling System Component | Marine-Grade Elastomer | 42038K02

    $31.99 $37.42
    Learn More

Our selection of Mercury outboard parts and service kits includes everything outboard owners need to maintain their Mercury 9.9HP 323cc outboard engines (1999 to 2004 models).

Shop our complete selection of parts and service kits for Mercury 9.9HP 323cc 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 9.9HP 323cc outboard engine models produced from 1995 to 1998.