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Sierra 18-4303-1 Powerhead Gasket Set for Johnson/Evinrude V4 Crossflow Outboards

Manufacturer

Picture for manufacturer Sierra

Part Number

18-4303-1
13 reviews
Sale Price

$137.13

4 left at this price

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Usually delivered within 2 days

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Product Details

The Sierra 18-4303-1 Powerhead Gasket Set is a comprehensive engine gasket kit engineered for Johnson and Evinrude V4 Crossflow outboard motors. This complete set provides everything needed for a full powerhead reseal or rebuild, replacing OEM part numbers 391300, 389556, and 0439085. Sierra parts are engineered to meet or exceed original equipment specifications, making this a trusted choice for marine technicians and DIY boaters alike.

Kit Contents:

  • 18-0850 – Fuel Pump Mounting Gasket (OEM 303615) × 1
  • 18-2876 – By-Pass Cover Gaskets (OEM 307133) × 4
  • 18-2866 – Exhaust Cover Gaskets (OEM 317914) × 2
  • 18-0953 – Water Passage Gasket (OEM 317951) × 1
  • 18-0117 – Exhaust Plate Gasket (OEM 317995) × 1
  • 18-2873 – Gaskets (OEM 318335) × 2
  • 18-2956 – Water Jacket Head Gaskets (OEM 318358) × 2
  • 18-2867 – Manifold to Crankcase Gasket (OEM 319174) × 1
  • 18-2857 – Air Silencer to Carb Gaskets (OEM 319771 / 386573) × 2
  • 18-0985 – Air Silencer Gasket (OEM 321722) × 1
  • 18-2864 – Adapter to Powerhead Gasket (OEM 321727) × 1
  • 18-0991 – Leaf Plate Gaskets (OEM 321907) × 4
  • 18-2547 – Water Pass. Cover Gasket (OEM 322858) × 1
  • 18-0102 – Exhaust Manifold Gasket (OEM 323469) × 1
  • 18-0134 – Intake Plate Gasket (OEM 326926) × 1
  • 18-0977 – Thermostat Gaskets (OEM 332369) × 2

OEM Cross-Reference Numbers: 391300, 389556, 0439085, 439085 (OMC) | 39080 (GLM) | 10-4303 (Gasket Tek) | 9-64112 (Mallory) | 802104, 878892 (Mercury)

Sierra is a trusted supplier to OEM engine manufacturers and boat builders, delivering quality marine engine components built to withstand the demanding saltwater and freshwater marine environment.

quick and easy

Good

Only disappointment was tried to use wt10 discount code found at retailmenot and it would not work, but a lesser code for 35 % discount on shipping did work. I amexpecting these to be for the front control arms, not rear...please confirm this.

Great Website.

Smooth

Wow! Super fast delivery, excellent communication, will definitely do business with again.

I have no comment right now. 1st timer

Went to ebay, amazon, and summit racing looking for this part and finally found it here after looking on this site for about 10 seconds.

Searched for a number of days and Autoplicity had the best price by far!! Thanks Autoplicity!!!

Fast shipping, good communication, a pleasure to do business with. I would definitely buy from again.

Best price on internet. Local dealer wanted 325 dollars more for exact item. Great place to do business.

Good selection at good prices

Great product, price and service and FREE delivery. Got my order in only 2 days.

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