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18-4317 - Gasket, 27-90484A88

List Price
$227.58

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$208.18
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SECURE CHECKOUT
SPEEDY DELIVERY
30-DAY RETURN
FULL WARRANTY

Part Number
18-4317

Manufacturer
Sierra Marine

18-4317 POWERHEAD GASKET SET Replaces: Mercury 27-90484A88

Contains:

  • 18-0182 Thermostat Gasket 27-62386 (2)
  • 18-0858 O-Ring 254029 (1)
  • 18-0860 O-Ring 25-62700 (1)
  • 18-0129 Reed Block Gasket 27-65744-3 (6)
  • 18-0135 Adapter Cover Gasket 27-78246 (1)
  • 18-0936 Relief Valve Plate Gasket 27-78690 (2)
  • 18-0952 Relief Valve Plate Gasket 27-88907 (2)
  • 18-7421 O-Ring 25-20415 (2)
  • 18-7411 O-Ring 25-35480 (1)
  • 18-2501 Reed Block Housing Gasket 27-93536-1 (1)
  • 18-2502 Divider Plate Gasket 27-90484-1 (2)
  • 18-2503 Drive Shaft Hsg. to Exhaust Plate Gasket 27-99177-1 (1)
  • 18-2506 Exhaust Plate Gasket 27-99176-3 (1)
  • 18-2508 Exhaust Plate Gasket 27-99776-1 (2)
  • 18-2509 Carb. Mtg. Gasket 27-67751 (3)
  • 18-2510 Reed Block Housing Gasket 27-96761-1 (1)
  • 18-2511 Drive Shaft Housing to Plate Gasket 27-99173-2 (1)
  • 18-2513 Cyl Block Sealing Gasket 27-11338 (2)
  • 18-2803 Carb. Mounting Gasket 27-90430 (3)
  • 18-2808 Cyl. Cover 27-96278 (2)
  • 18-2826 Water Pump Base to Gear Housing Gasket 27-85610-1 (1)
  • 18-2914 Water Pump Gasket 27-85608-1 (1)
  • 18-2915 Water Pump Gasket 27-85609-1 (1)
  • 18-3110 Bushing 26-38970 (2)
  • 18-7153 O-Ring 25-25439 (1)
  • 18-7157 O-Ring 25-29976 (1)
  • 18-7159 O-Ring 25-31534 (1)
  • 18-7162 O-Ring 25-33145 (1)
  • 18-7164 O-Ring 25-33466 (1)
  • 18-7168 O-Ring 25-48171 (4)
  • 18-7174 O-Ring 25-45711 (2)
  • 18-7176 O-Ring 25-90011 (1)
  • 18-7196 O-Ring 25-38099 (1)
  • 18-7812 Fuel Pump Kit 89031A2 (1)
  • 18-7816 Fuel Pump Diaphragm Kit 21-42990A9 (1)
  • 18-3863 Head Gasket 27-96542-1 (2)
  • 18-0359 Induction Silencer Cover Gasket 27-67275-1 (1)
  • 18-0384 Carburetor Gasket 27-89221-1 (3)
  • 18-2919 Water Pump Gasket 27-42631-1 (1)
  • 18-7406 O-Ring — (1)
Technical information (PDF)
Warranty (PDF)
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Sierra Marine 18-4317 - Gasket, 27-90484a88 is equivalent to parts:

  • 90484A88 Mercury Marine
  • 27 90484A88 Mercury Marine
  • 9-64200 Mallory Marine
Sierra Marine is the market leader for aftermarket marine engine parts. Sierra products cover every major engine brand. Sierra offers a comprehensive product line and an unsurpassed customer satisfaction warranty covering parts and labor.

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