Sierra 18-2586 Upper Unit Seal Kit for Volvo Penta - Replaces 3850594

The Sierra 18-2586 Upper Unit Seal Kit is a rubber and silicone seal set engineered for sealing the upper unit on Volvo Penta drive applications. Built to prevent water intrusion and lubricant leakage at critical seal points, this kit is a straightforward way to restore a tight, reliable seal during a rebuild or routine maintenance of the upper drive unit. Each kit ships as a complete set (1 unit count) so you have the seals needed for the job in one package, without having to source individual components separately.

The kit is molded in white rubber and silicone material for durability and a consistent seal under marine operating conditions. It is manufactured in Taiwan and carries the Sierra brand's standard limited warranty. Boat owners and marine technicians use this kit when servicing Volvo Penta lower/upper unit assemblies, replacing worn factory seals that have hardened, cracked, or begun to leak with age.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2586
• Product Type: Upper Unit Seal Kit
• Material: Rubber, Silicone
• Color: White
• Number of Items: 1
• Weight: 0.17 pounds
• Package Dimensions: 17.1 centimeters H x 3.5 centimeters L x 14 centimeters W
• UPC: 808282227661
• Country of Origin: Taiwan

Fitment

Designed for sealing Volvo Penta drive engines.

Replaces (OEM)

• 3850594

Frequently Asked Questions

What does the Sierra 18-2586 Upper Unit Seal Kit include? The kit includes 1 complete set of rubber and silicone seals for the upper unit, part number 18-2586, packaged as a single unit count.

What OEM part number does 18-2586 replace? Sierra 18-2586 replaces Volvo OEM part number 3850594.

What is this seal kit used for? It seals the upper unit on Volvo Penta drive engines, preventing water intrusion and lubricant leakage at the seal points during a rebuild or routine service.

What material are the seals made from? The seals in kit 18-2586 are made from rubber and silicone, colored white.

How much does the 18-2586 seal kit weigh? The Sierra 18-2586 Upper Unit Seal Kit weighs 0.17 pounds.

Where is the Sierra 18-2586 seal kit manufactured? This seal kit is manufactured in Taiwan.

Is the Sierra 18-2586 kit genuine OEM or aftermarket? It is a Sierra-brand aftermarket replacement kit, designed to replace the equivalent Volvo OEM part 3850594.

How many seals come in the 18-2586 kit? The kit ships as a single complete set, listed as 1 unit count, containing the seals needed for the upper unit.

Does the Sierra 18-2586 kit come with a warranty? Yes, the 18-2586 Upper Unit Seal Kit is covered by Sierra's limited warranty.

What are the package dimensions of the 18-2586 seal kit? The package for Sierra 18-2586 measures 17.1 centimeters H x 3.5 centimeters L x 14 centimeters W.