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Quicksilver 878408A 1 Power Trim O-Ring Repair Kit for Mercury Outboards

Manufacturer

Quicksilver

<h3>Quicksilver: The Marine Enthusiast&apos;s Trusted OEM Brand</h3><p>For boaters who refuse to compromise on quality, <strong>Quicksilver</strong> has been the benchmark for marine parts, accessories, and engine care products since 1950. Based in Fond du Lac, Wisconsin, Quicksilver operates as the parts and accessories brand of Mercury Marine — and that heritage is central to everything it makes. As the only marine aftermarket brand manufactured and recommended by an original-equipment manufacturer, Quicksilver brings factory-level engineering directly to boat owners, professional technicians, and weekend warriors alike.</p><p>What sets Quicksilver apart from generic aftermarket suppliers is its direct lineage to the engineers who designed the engines in the first place. Every component is engineered, tested, and manufactured with the same exacting standards as the original equipment it replaces. The result is a product line that fits right the first time and delivers the reliability boaters depend on — whether they&apos;re navigating calm inland lakes or pushing through demanding saltwater conditions.</p><p>Quicksilver&apos;s catalog spans more than 40,000 parts across 12 product lines, covering outboard and sterndrive engines from Mercury, Mariner, Yamaha, Honda, Evinrude, Johnson, Suzuki, and more. Among the most critical components in that lineup are Quicksilver Fuel Pumps, which are built to deliver factory fit and consistent fuel delivery across a wide range of outboard applications. Reliable fuel delivery is the foundation of engine performance, and Quicksilver&apos;s fuel system components are engineered to handle the demanding conditions of marine use — including compatibility with current fuel formulations.</p><p>Beyond fuel systems, Quicksilver is a go-to source for Propeller Parts &amp; Accessories that help boaters maintain and optimize their propulsion systems. From hub kits that protect both prop and gearcase to installation hardware and prop tools, these components are designed to the same tolerances as the drives they support. Proper propeller maintenance is one of the most impactful things a boat owner can do for performance, efficiency, and engine longevity — and Quicksilver makes that job straightforward.</p><p>The brand&apos;s commitment extends across lubricants, impellers, thermostats, anodes, fuel filters, oil filters, maintenance kits, and complete service packages — all engineered for the marine environment and tested to meet or exceed the standards of major engine manufacturers. Whether you&apos;re performing routine seasonal maintenance or tackling a more involved repair, Quicksilver provides the parts that restore your engine to peak operating condition.</p><ul style="list-style:disc"><li>OEM-backed engineering from Mercury Marine</li><li>Compatible with Mercury, Yamaha, Honda, Evinrude, Johnson, Suzuki, and Mariner engines</li><li>Over 40,000 parts spanning 12 product lines</li><li>Formulated and tested for freshwater and saltwater environments</li><li>Trusted by DIY boaters and professional marine technicians since 1950</li></ul><p>When reliability on the water is non-negotiable, Quicksilver delivers the peace of mind that only a true OEM-backed brand can provide.</p>

Part Number

878408A 1
09/12/2036 11:03 AM
Sale Price

$103.71

4 left at this price

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Quicksilver 878408A 1 is a genuine OEM Power Trim Repair Kit designed to restore proper hydraulic function to Mercury and Mariner outboard power trim and tilt systems. This kit addresses common trim system failures caused by worn or degraded seals and O-rings, including hydraulic fluid leaks and loss of trim pressure.

As an authentic Quicksilver factory part, this kit is manufactured to the same specifications as the original components, ensuring a precise fit and reliable performance. It includes the seals and O-rings necessary to rebuild the power trim cylinder assembly on a wide range of Mercury and Mariner outboard engines.

Key Features:

  • Genuine Quicksilver OEM factory replacement kit — not aftermarket
  • Includes seals and O-rings required to rebuild the power trim/tilt cylinder
  • Restores hydraulic integrity and stops trim fluid leaks
  • Engineered to exact Mercury Marine factory specifications
  • Compatible with Mercury and Mariner outboard engines ranging from 135–300 HP (2.5L and 3.0L), including DFI and select Verado models
  • Sold as a single kit (Quantity = 1)

OEM / Cross-Reference Part Numbers: 878408A1, 878408A 1

This repair kit is the correct OEM solution for restoring a leaking or non-functioning power trim system. Typical repair time ranges from one to four hours depending on experience level.

great prices, great shipping, good site

Would like to see shipping estimate at order entry

GREAT SERVICE

Autoplicity had a part no one else could supply or didn't know they had it!!

Excellent experience A+

EASY

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Although you should receive a 2 star review, I give it 5 stars only because I should have checked out with paypal before and because of your excellent customer service. Fix the glitch in your system so orders can actually be processed on your page instead

So far so good

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